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Based on this research paper, what are the key findings regarding the deuterium-hydrogen (D/H) ratios of molecular hydrogen (H2) in soil gases along the Yamasaki fault, and how do these findings relate to the background context of using soil gases to understand tectonic activity and fault movements? Also, explain the i... | This research paper investigates the deuterium-hydrogen (D/H) ratios, expressed as SD values, of molecular hydrogen (H2) in soil gases collected along the Yamasaki fault, an active fault in Southwest Japan. The key finding is that the SD values of H2 in these soil gases range between -770 and -470°/00, which are signif... | (JAPAN) Kita et al 1980 - D-H ratios of H2 in soil gases as an indicator of fault movements.txt
Geochemical Journal, Vol. 14, pp. 317 to 320, 1980317
D/H ratios of H2 in soil gases as an indicator of
fault movements
ITSURO KITA,I SADAO MATSUO,r HIROSHI WAKITA' and Yuji NAKAMURA'
Department o... |
This research paper investigates the hydrogen and methane isotopic compositions in volcanic areas of northeastern Japan. Based on the provided text, what were the key findings regarding the D/H ratios of volcanic condensates, hydrogen, and methane? What do these findings suggest about the origin and behavior of these c... | The research paper's key findings and results revolve around the deuterium to hydrogen (D/H) ratios (expressed as δD values relative to SMOW - Standard Mean Ocean Water) of volcanic condensates, hydrogen, and methane collected from several volcanic areas in northeastern Japan. Specifically:
* **Volcanic Condensates:... | (JAPAN) Kiyosu 1982 - d2H-H2 and d2H-CH4 from volcanic areas in northeastern Japan.txt
Earth and Planetary Science Letters, 62 (1983) 41-52 41
Elsevier Scientific Publishing Company, Amsterdam - Printed in The Netherlands
[31
Hydrogen isotopic compositions of hydrogen and methane from
some volcanic areas in northea... |
Based on the study of the Hakuba Happo hot spring in Japan, what are the key findings regarding the origin of methane in serpentinite-hosted hydrothermal systems? Discuss the background and context of why such systems are important, the key concepts like serpentinization and Fischer-Tropsch-type (FTT) reactions, and th... | This study investigates the origin of methane (CH4) in serpentinite-hosted hydrothermal systems, focusing on the Hakuba Happo hot spring in Japan. These systems are important because they are considered potential sites for abiotic organic synthesis and habitats for early microbial life, especially given the potential a... | (JAPAN) Suda et al 2014 - origin of CH4 in serpentinite-hosted hydrothermal systems, Hakuba Happo hot spring, Japan.txt
Earth and Planetary Science Letters 386 (2014) 112-125 Contents lists available at ScienceDirect EARTH Earth and Planetary Science Letters ELSEVIER www.elsevier.com/locate/epsl Origin of methane in se... |
This research investigates abiogenic hydrocarbon production in the serpentinite-hosted Hakuba Happo hot spring in Japan. Considering this context, what are the key findings and results of the study, what are the important scientific concepts and terms used, and what background or motivation led to this research? | This research paper investigates the production mechanisms of abiogenic hydrocarbons in the Hakuba Happo hot spring, a serpentinite-hosted system in Japan, which is considered an important site for abiotic synthesis of organic compounds and potentially relevant to the origin of life. The background for this study stems... | (JAPAN) Suda et al 2017 - compound-specific carbon isotope signatures of abiogenic HCs from Hakuba Happo hot spring.txt
Available online at www.sciencedirect.com Geochimica et ScienceDirect Cosmochimica Acta ELSEVIER Geochimica et Cosmochimica Acta 206 (2017) 201-215 www.elsevier.com/locate/gca Compound- and position-s... |
Based on the research by Sugisaki et al. (1983), what are the key findings regarding the origin and relationship of H2 and CO2 in fault gases to fault activity, including the background context that motivated this research and the important scientific concepts used? | The research by Sugisaki et al. (1983) investigates the origin of hydrogen (H2) and carbon dioxide (CO2) in gases occluded in fracture zones of active faults in Japan and their relationship to fault activity. The background context is that active faults are associated with earthquakes, and understanding fault activity ... | (JAPAN) Sugisaki et al 1983 - origin of H2 and CO2 in fault gases and its relation to fault activity.txt
VOLUME 91
THE JOURNAL OF GEOLOGY
May 1983
ORIGIN OF HYDROGEN AND CARBON DIOXIDE IN FAULT GASES AND ITS
RELATION TO FAULT ACTIVITY1
RYUICHI SUGISAKI, MASAHIKO IDO, HIROSHI TAKEDA, YUMIKO ISOBE, YOSHIMITSU HAYASH... |
What are the key findings and results, important concepts, and background context of the study on groundwater dynamics in Kikai Island, Southwest Japan, as investigated using radiocarbon and stable isotopes? | This research paper investigates groundwater dynamics on Kikai Island, a small carbonate island in Southwest Japan, focusing on the use of radiocarbon (¹⁴C) and stable isotopes (δ¹⁸O and δD) as tracers.
**Background and Context:** The study is motivated by the increasing global challenges related to groundwater overe... | 1-s2.0-S0048969724011884-main.txt
Science of the Total Environment 921(2024) 171049 Contents lists available at ScienceDirect Science Science of the Total Environment ELSEVIER Groundwater dynamics on small carbonate islands: Insights from radiocarbon and stable isotopes in Kikai Island, Southwest Japan Mana Tsujino a,b... |
What are the key findings and results of Akishiba and Nishio's 2025 research on the hydrogeochemistry of Okayama and Tottori Prefectures, southwest Japan, focusing on slab-derived fluids? Furthermore, what are the key concepts introduced in the study, and what background context motivated this research? | This research investigates the presence and distribution of Arima-type fluids, which originate from the dehydration of the subducting Philippine Sea Plate beneath southwest Japan. The study was motivated by the limited number of reported occurrences of Arima-type fluids, despite the expectation that they should be more... | Akishiba (2025) hydrogeochemistry of okayama and trottori prefectures - slab derived fluids.txt
Akishiba and Nishio Progress in Earth and Progressin Earth and Planetary Science (2025) 12:10 Planetary Science https://doi.org/10.1186/s40645-024-00679-y RESEARCH ARTICLE Open Access Lithium and strontium isotope hydrogeoch... |
Based on the study of Upper Cretaceous to Paleocene forearc basin sediments in Northeast Japan, what are the key findings regarding cyclic sedimentation and basin evolution, and how do they relate to global eustatic changes and tectonic events? Furthermore, what is the context of the Yezo forearc basin within the broad... | This research paper focuses on the stratigraphic correlation of Upper Cretaceous to Paleocene sediments within the Yezo forearc basin of Northeast Japan, aiming to delineate the basin's sedimentary history and evolution.
**Key Findings and Results:**
* The study identified two second-order shallowing-upward cycles ... | Ando (2002) - Stratigraphic correlation of Upper Cretaceous to Paleocene forearc basin sediments.txt
Stratigraphic correlation of Upper Cretaceous to Paleocene forearc basin
sediments in Northeast Japan: cyclic sedimentation and basin evolution
Hisao Ando *
Department of Environmental Sciences, Faculty of Science, Ibar... |
What are the key findings, important concepts, and background context of this research concerning the exotic slices found within the Poroshiri ophiolite in Hokkaido, Japan, in relation to the Hidaka metamorphic belt? | This research investigates exotic rock slices found within the Poroshiri ophiolite in Hokkaido, Japan, and their relationship to the Hidaka metamorphic belt (HMB). The **background and context** are the complex tectonic interactions between the HMB and the Poroshiri ophiolite, separated by the Hidaka Main Thrust (HMT).... | Arai (1995) - Exotic slices derived from the Hidaka metamorphic belt in the Poroshiri ophiolite_translated.txt
Mines
rock
90, 388-402, 1995
Trapped during polosiliophiolite
Anomaly rock mass of Hidaka metamorphic belt originating
Exotic slices derived from the Hidaka metamorphic belt in the
Poroshiri ophiolite, Hokkaid... |
Based on the research paper, what are the key findings regarding the origin and evolution of the Hida belt in Japan, what important concepts and terms are used to explain these findings, and what background context motivated this study? | The research paper investigates the crustal development of the Hida belt in central Japan using chemical and Sr-Nd isotopic analyses of igneous and metamorphic rocks.
**Key Findings and Results:**
* The study identifies three main stages of igneous activity in the Hida belt: late Silurian amphibolites, middle Carbo... | ARAKAW~1.txt
Crustal development of the Hida belt, Japan: Evidence from Nd±Sr
isotopic and chemical characteristics of igneous and metamorphic
rocks
Yoji Arakawaa,*, Yutaka Saitoa, Hiroshi Amakawab
aDepartment of Geology, Faculty of Education, Saitama University, Urawa, Saitama 338-0825, Japan
bOcean Research Institute... |
Based on the provided text, what are the key findings regarding the Sumikawa geothermal reservoir's characteristics and management, including its geological context, thermal and permeability structures, and the strategies employed to optimize energy production? | The research paper focuses on the Sumikawa geothermal reservoir in northeastern Japan, within the Hachimantai volcanic region, known for its active volcanism and geothermal activity. Key findings and concepts include:
* **Background and Context:** The Sumikawa field is located within a north-south oriented regional ... | Ariki (2000) Sumikawa geothermal reservoir.txt
Characteristics and management of the
Sumikawa geothermal reservoir, northeastern
Japan
Kazuharu Arikia,*, Hisao Katoa, Akira Uedaa,
Mitsutaka Bambab
aMitsubishi Materials Corporation, Central Research Institute, 1-297 Kitabukurocho, Saitama 330-8508,
Japan
bMitsubishi Mat... |
Based on this research paper, what are the key findings regarding the K-Ar geochronology of the Hidaka metamorphic belt, how do these findings contribute to our understanding of the belt's tectonics and exhumation, and what are the important concepts and background information necessary to interpret these findings? | This research paper focuses on the K-Ar geochronology of the Hidaka metamorphic belt in Hokkaido, Northern Japan, to understand its tectonics and exhumation history.
**Background and Context:** The Hidaka metamorphic belt is a steeply dipping sequence of metamorphic and igneous rocks, exhibiting a gradient in metamor... | Arita (1993) - K-Ar geochronological constraints on tectonics and exhumation of metamorphic belt_translated.txt
J. Min. Petr. Econ. Geol.
88, 101-113, 1993
K-Ar geochronological constraints on tectonics and
exhumation of the Hidaka metamorphic belt,
Hokkaido, Northern Japan
Kazunori ARITA*, Hirohisa SHINGU* and Tetsuma... |
Based on the research paper, what are the key findings regarding the crustal structure of the Hidaka Collision Zone, what important geological concepts and structures were identified, and what is the background and tectonic context that motivated this study? | This research paper investigates the crustal structure and tectonics of the Hidaka Collision Zone in southern Central Hokkaido, Japan, using vibroseis seismic reflection and gravity surveys. The study was motivated by the complex collisional features observed in the Hidaka Mountains, which offer a unique opportunity to... | Arita (1998) - Crustal structure and tectonics of the Hidaka Collision Zone.txt
ELSEVIER Tectonophysics 290 (1998) 197±210
Crustal structure and tectonics of the Hidaka CollisionZone, Hokkaido
(Japan), revealed by vibroseis seismicre¯ection and gravity surveys
KazunoriAritaa,,Takashi Ikawab,T anioItob,AkihikoYamamotoc... |
Based on the research paper, what are the key findings regarding the Horokanai ophiolitic complex, including its structure, metamorphic conditions, and rock composition? Furthermore, what is the background context of this study, particularly concerning the Kamuikotan tectonic belt and the significance of finding an oph... | The research paper focuses on the Horokanai ophiolitic complex within the Kamuikotan tectonic belt in Hokkaido, Japan, and reveals several key findings. First, the Horokanai ophiolitic complex overlies Kamuikotan blueschists and consists of a sequence of rocks including serpentinite, layered meta-peridotites and gabbro... | Asahina (1979) - The Horokanai ophiolitic complex in the Kamuikotan tectonic belt_translated.txt
JOURNAL OF THE GEOLOGICAL SOCIETY OF JAPAN, Vol. 85, No. 6, p. 317-330, June 1979
THE HOROKANAI OPHIOLITIC COMPLEX IN THE KAMUIKOTAN
TECTONIC BELT, HOKKAIDO, JAPAN
TOSHIHIRO ASAHINA* and MASAYUKI KOMATSU**
Abstract The Horo... |
What are the key findings and results of the research on the Horokanai ophiolitic complex, what are the important geological concepts discussed, and what is the background context and motivation behind this study? | The research paper focuses on the Horokanai ophiolitic complex located in the Kamuikotan tectonic belt of Hokkaido, Japan. The **key findings and results** include the identification and description of a (incomplete) ophiolite sequence consisting of, from bottom to top, serpentinite, layered meta-peridotites and gabbro... | Asahina 1979 - the horokanai ophiolite complex_translated.txt
JOURNAL OF THE GEOLOGICAL SOCIETY OF JAPAN, Vol. 85, No. 6, p. 317-330, June 1979
THE HOROKANAI OPHIOLITIC COMPLEX IN THE KAMUIKOTAN
TECTONIC BELT, HOKKAIDO, JAPAN
TOSHIHIRO ASAHINA* and MASAYUKI KOMATSU**
Abstract The Horokanai ophiolitic complex overlies t... |
Based on this research paper about the tectonic evolution of Southwest Japan, what are the key findings regarding the region's formation, what important geological concepts are discussed, and what is the broader context or motivation that prompted this study? | This research paper re-evaluates existing interpretations of the tectonic evolution of Southwest Japan and proposes a new synthesis. The key finding is that Southwest Japan is an accumulation of allochthonous terrains, originating within the Pacific Basin, which have been accreted to the Asian margin throughout the Mes... | Barber 1982 Interpretation of the tectonic evolution of Southwest Japan.txt
Interpretations of the tectonic evolution ofSouthwest Japan
A.J.Barber
BARBER, A. J., 1982. Interpretat!ons of the tectonic evolution of Southwest Japan. Proc.
Geol. Ass., ~~(2),131-145.~tthe J~nctlOnof three of the Earth's m ajorlithospheric p... |
This paper reviews the tectonic evolution of SW Japan. What are the key findings regarding the tectonic models proposed over the last few decades, including the background and context that led to their development, and what are the important concepts discussed? | This review paper examines the evolving interpretations of SW Japan's tectonic evolution from the Late Paleozoic to Mesozoic. Initially, the dominant 'Pacific-type orogeny' model (1970s) proposed a steady oceanic subduction since the Paleozoic, emphasizing the absence of nappes and contrasting with alpine chains. Key c... | Charvet 2013 late paleozoic tectonic SW Japan.txt
Journal of Asian Earth Sciences 72(2013) 88-101 ContentslistsavailableatSciVerseScienceDirect Journal of Asian Earth Sciences ELSEVIER journal homepage: www.elsevier.com/locate/jseaes Review Late Paleozoic-Mesozoic tectonic evolution of SW Japan: CrossMark A review - Re... |
Based on this research paper, what are the key findings and results regarding the attainment of solution and gas equilibrium in Japanese geothermal systems? Furthermore, what are the important geochemical concepts and mineral assemblages discussed in relation to controlling fluid chemistry, and what background informat... | This research paper investigates the attainment of aqueous and gaseous equilibrium in geothermal fluids from seven Japanese geothermal systems. Key findings and results include:
* **Aqueous Equilibrium:** The pH of geothermal reservoir fluids is buffered by the K-feldspar-K-mica-quartz assemblage. The activity ratio... | Chiba (1990) - Attainment of solution and gas equilibrium in japanese geothermal systems.txt
Geochemical Journal, Vol. 25, pp. 335 to 355, 1991
Attainment of solution and gas equilibrium in
geothermal systemsJapanese
HITOSHI CHIBA
Institute for Study of the Earth's Interior, Okayama Univertity,
Misasa,... |
Based on this research paper, what are the key findings regarding the attainment of aqueous and gaseous equilibrium in Japanese geothermal systems, including the major factors controlling fluid composition, and how does this research build upon prior studies in geothermal geochemistry, particularly concerning the roles... | This research investigates the attainment of aqueous and gaseous equilibrium in seven Japanese geothermal systems, building upon previous studies in Iceland and New Zealand. Key findings indicate that: 1) the pH of reservoir fluids is buffered by the K-feldspar-K-mica-quartz assemblage; 2) activity ratios like (Na+)/(K... | Chiba (1990) Attainment of solution and gas equilibrium in japanese geothermal systems.txt
Geochemical Journal, Vol. 25, pp. 335 to 355, 1991
Attainment of solution and gas equilibrium in
geothermal systemsJapanese
HITOSHI CHIBA
Institute for Study of the Earth's Interior, Okayama Univertity,
Misasa, T... |
Based on this chapter, what are the key findings regarding the Palaeozoic basement and associated cover in Japan, focusing on the Hida Belt, and how does the Hida Belt's geological history contrast with other geotectonic units in Japan? In your answer, include a description of the Hida Gneiss Complex, its metamorphic s... | This chapter focuses on describing the Palaeozoic basement inliers and their associated cover in Japan, specifically within the Hida, Oeyama, Hida Gaien, Kurosegawa, and South Kitakami Belts. A key finding is the identification and characterization of these older rocks, which are largely overlain by Late Palaeozoic to ... | Ehiro (2016) palaeozoic basement and associated cover in japan book chapter_translated.txt
2a
Palaeozoic basement
and associated cover
MASAYUKI EHIRO (COORDINATOR), TATSUKI TSUJIMORI,
KAZUHIRO TSUKADA & MANCHUK NURAMKHAAN
Pre-Cenozoic rocks of the Japanese islands are largely composed of
Latest Palaeozoic to Cretaceous... |
Based on the research paper, what are the key findings regarding the Palaeozoic basement and associated cover in Japan, including the geological context that led to this study, the important concepts used to describe the different belts, and the specific results obtained from studying the Hida Belt? | This research paper focuses on the Palaeozoic basement rocks and their associated cover sequences found in limited terranes within the Japanese islands, specifically the Hida, Oeyama, Hida Gaien, Kurosegawa, and South Kitakami Belts. The study is motivated by the fact that the pre-Cenozoic rocks of Japan are primarily ... | Ehiro et al., (2016) - Palaeozoic basement and associated cover_translated.txt
2a
Palaeozoic basement
and associated cover
MASAYUKI EHIRO (COORDINATOR), TATSUKI TSUJIMORI,
KAZUHIRO TSUKADA & MANCHUK NURAMKHAAN
Pre-Cenozoic rocks of the Japanese islands are largely composed of
Latest Palaeozoic to Cretaceous accretionar... |
Based on the aeromagnetic data and other geological evidence, what are the key findings regarding the Early Cretaceous Kitakami magmatic arc in northeast Japan, including its structure, relationship to the modern forearc, and the broader tectonic context? Also, explain the key scientific concepts like 'magmatic arc,' '... | The research paper by Finn (1994) presents aeromagnetic evidence revealing the buried roots of the Early Cretaceous Kitakami magmatic arc in northeast Japan. The key findings are:
* **Identification of a Buried Batholith:** Positive aeromagnetic anomalies, supported by drilling data and models, indicate the presence... | Finn (1994) - Aeromagnetic evidence for a buried Early Cretaceous magamtic arc.txt
JOURNAL OF GEOPHYSICAL RESEARCH, VOL. 99, NO. Bll, PAGES 22,165-22,185, NOVEMBER 10, 1994
Aeromagnetic evidence for a buried Early Cretaceous
magmatic arc, northeast Japan
Carol Finn
U.S. Geological Survey, Denver, Colorado
Abstract... |
Based on this study, what are the key findings regarding the thermal and denudation histories across the northeast Japan Arc, what are the important concepts and methodologies used to derive these findings, and what is the background and motivation for conducting this research in the context of island arc tectonics? | This study investigates the thermal and denudation histories across the northern part of the northeast (NE) Japan Arc using (U-Th)/He thermochronometry on apatite (AHe) and zircon (ZHe). The key findings reveal a distinct contrast in thermal and denudation histories between different tectonic units. Specifically, the f... | Fukuda (2020) thermocvhronometric mapping across NE japan arc.txt
Fukudaetal.Earth,PlanetsandSpace (2020) 72:24 Earth, Planets and Space https://doi.org/10.1186/s40623-020-01151-z FULL PAPER Open Access (U-Th)/He thermochronometric mapping across the northeast Japan Arc: towards understanding mountain building in an i... |
Based on this research paper, what are the key findings and results concerning the geochemistry of dacite chlorine in the Hishikari gold deposit area, and how does this relate to the formation of the gold deposits? Additionally, what are the important concepts and background context that motivate this research? | This research paper investigates the geochemistry of chlorine in dacites within the Hishikari gold mining area in Kyushu, Japan, focusing on its role in the formation of the epithermal gold deposits.
**Key Findings and Results:**
* The study highlights that the dacites associated with mineralization, particularly K... | Furusawa 2012 Cl in dacite_translated.txt
Resource Geology,62(1),1~16,2012
Editorials and Reports
Geochemistry of dacite chlorine in the Hishikari gold deposit area.
Furusawa Miyuki*・Nego-building equipment
**
Chlorine Geochemistry of Dacites in the Hishikari Gold Mining Area, Kyushu, Japan
By Miyuki FURUSAWA" and Mune... |
Based on Furuyama's 1989 paper, what are the key findings regarding the volcanostratigraphy of the Terada Volcanics within the Pliocene Teragi Group in Southwest Japan, and how does this research build upon or differ from previous studies? In your answer, discuss the geological context of the Teragi Group, including it... | Furuyama's 1989 paper focuses on the volcanostratigraphy of the Terada Volcanics, which form the upper part of the Pliocene Teragi Group in eastern Tottori and northwestern Hyogo Prefectures, Southwest Japan. The research builds upon earlier work by Wadatsumi and Matsumoto (1958) and Matsubara et al. (1966), who initia... | Furuyama (1989) Geology of the Teragi Group, southwest japan.txt
March,1989 Geology of the Teragi Group, Southwest Japan -withspecialreferencetotheTeradaVolcanics- KatsuhikoFURUYAMA (with4Figures,1Tableand12Plates) Introduction The Pliocene Teragi Group is distributed in eastern Tottori and northwestern Hyogo Prefectur... |
What is the background and motivation for this research on magnetic dipole anomalies in southwest Japan, and what are the key findings and results related to mantle wedge serpentinization and serpentine diapirs, including important concepts and terms used in the study? | This research is motivated by the observation of seafloor outcrops of serpentinized material in forearc regions, specifically between trenches and volcanic fronts. These materials are believed to originate from the mantle wedge, hydrated by fluids released from the subducting slab, and ascend as diapirs due to their lo... | Geochem Geophys Geosyst - 2004 - Kido - Magnetic dipole anomalies as indicators of mantle wedge serpentinization.txt
Magnetic dipole anomalies as indicators of mantle wedge
serpentinization
Yukari Kido
Institute for Research on Earth Evolution, Independent Administrative Institution, Japan Agency for Marine-Earth
Scien... |
Based on the provided text, what are the key findings and results of the geochemical analysis of Neogene Nansatsu volcanic rocks in South Kyushu, Japan, and how does this relate to the background context of igneous activity in the region, including important concepts like island-arc signatures and the Shimanto Supergro... | The research paper focuses on the geochemistry of Neogene Nansatsu volcanic rocks in South Kyushu, Japan, analyzing the whole-rock major and trace element, and Sr-Nd-Pb isotopic compositions.
**Key Findings and Results:**
* The study analyzed volcanic rocks from the Oldest (middle Miocene), Older (late Miocene), an... | Geochemistry of Neogene Nansatsu volcanic rocks in South Kyushu Japan.txt
Taylor & Francis Geology International Geology Review Review ISSN: (Print) (Online)Journal homepage: www.tandfonline.com/journals/tigr20 Geochemistry of Neogene Nansatsu volcanic rocks in South Kyushu, Japan Mizuki Ishida, Shumpei Murakami, Shik... |
Based on the seismic refraction/wide-angle reflection profiling conducted in Northern Honshu Arc, Japan, what are the key findings regarding crustal structure and deformation, what important concepts underpin these findings, and what is the background context that motivated this research? | This research paper presents a new crustal structure model of the Northern Honshu Arc, Japan, derived from an extensive onshore-offshore wide-angle seismic experiment conducted in 1997. The key findings reveal significant differences in crustal structure and deformation between the western and eastern parts of the arc,... | Geophysical Research Letters - 2001 - Iwasaki - Extensional structure in Northern Honshu Arc as inferred from seismic.txt
GEOPHYSICAL RESEARCH LETTERS, VOL. 28, NO. 12, PAGES 2329-2332, JUNE 15, 2001
Extensional structure in northern Honshu Arc as inferred from
seismic refraction/wide-angle reflection profiling
Taka... |
What are the key findings, important concepts, and background context of the research on the Kurosegawa Terrane presented in this paper? | This paper provides an overview of the Kurosegawa Terrane, focusing on its geotectonic evolution and constituent rocks, particularly in Shikoku.
**Background and Context:** The research stems from observations dating back to the 1930s, noting unique lithologies (granitic rocks, high-grade metamorphic rocks, serpentin... | Hada (1990) Kurosegawa Terrane.txt
ResearchGate Kurosegawa Terrane Chapter· April 1990 CITATIONS READS 22 224 Shigeki Hada Yukio Isozaki Kobe University(retired) The Univeristy of Tokyo 53 PUBLICATIONS761 CITATIONS 268 PUBLICATIONS 11,360 CITATIONS SEE PROFILE SEE PROFILE All content following this page was uploaded by... |
Based on this research, what are the key findings regarding the Kurosegawa Terrane's origin and current location, including its geological composition, important concepts used to determine its origin, and the broader context of its significance in understanding continental margin development? | This research paper focuses on the Kurosegawa Terrane in Southwest Japan, presenting it as a disrupted remnant of a Gondwana-derived terrane.
**Key Findings and Results:** The primary finding is that the Kurosegawa Terrane, now located between two Mesozoic subduction complexes in Southwest Japan, is an exotic, far-tr... | Hada et al. 2001 Kurosegawa Terrane in Southwest Japan, Disrupted remnants of a Gondwana-Derived Terrane.txt
Gondwana Research, K 4, No. I, pp. 27-38. 0 2001 International Association for Gondwana Research, Japan.
ISSN: 1342-937X
Kurosegawa Terrane in Southwest Japan: Disrupted
Remnants of a Gondwana-Derived Terrane... |
This research paper focuses on the Miocene syn-rift succession in the Kinbusan area of eastern Tottori Prefecture, Japan. Considering the paper's background, key findings, and significant concepts, what did the study reveal about the formation of the Kinbusan Graben, its relationship to the opening of the Japan Sea, an... | This research paper investigates the Miocene geology of the Kinbusan area in eastern Tottori Prefecture, Japan, to better understand the tectonics of the southwest Japan Arc and the opening of the Japan Sea. The background to this study lies in the limited understanding of the stratigraphy and basin development of the ... | Haji (2023) Small half_graben inferred from a Miocene syn_rift succession in the Kinbusan area eastern.txt
RESEARCH ARTICLE
Small half-graben inferred from a Miocene syn-rift succession
in the Kinbusan area, eastern Tottori Prefecture, Japan
Toshiki Haji
Research Institute of Geology and
Geoinformation, Geological Sur... |
Based on this research paper, what are the key findings regarding the deep structure of northeastern Japan, including its relationship to seismic and volcanic activity? Explain the background context and important concepts related to subduction zones, seismic zones, and magma reservoirs that are essential for understan... | This research paper by Hasegawa et al. (1991) investigates the deep structure of northeastern Japan and its connection to seismic and volcanic activity. The key findings include:
* **Low-velocity zones:** Tomographic inversions of P-wave velocity data reveal low-velocity zones in the crust and upper mantle beneath a... | Hasegawa (1991) deep structure of northeastern japan.txt
96. Collinge, J. eta/. Lancet ii, 15-17 (19891.
97. Collinge, J. eta/. Lancet 336, 7-9 (1990).
98. McKinley. M. P .. DeArmond, S. J .. Torchia, M .. Mobley, W. C. & Prusiner, S. B .. Neurology 39,
1319-1324 (1989).
99. Hsiao, K. K. et al. Science 250, 1587-15... |
Based on this research, what are the key findings regarding the deep structure of the northeastern Japan arc, how do these findings explain crustal deformation and shallow seismic activity, and what are the important concepts and background context that led to this investigation? | This research paper investigates the deep structure of the northeastern Japan arc to understand the mechanisms behind crustal deformation and shallow seismic activity. The background context is the location of northeastern Japan within a subduction zone where the Pacific plate subducts beneath the North American plate,... | Hasegawa (2005) deep structure of northeastern japan.txt
Available online at www.sciencedirect.com TECTONOPHYSICS SCIENC DIRECT ELSEVIER Tectonophysics 403 (2005) 59-75 www.elsevier.com/locate/tecto Deep structure of the northeastern Japan arc and its implications for crustal deformation and shallow seismic activity Ak... |
Based on this research paper, what are the key findings regarding the geologic composition and tectonic history of Hokkaido, including its relationship to surrounding regions and major geological events? Please detail the different tectonic belts present in Hokkaido, their affiliation with the Honshu and Kuril arcs, an... | The research paper focuses on the geologic composition and tectonic history of Hokkaido, emphasizing its complex relationship with the Honshu and Kuril arcs and the surrounding regions. Key findings include:
* **Tectonic Setting:** Hokkaido is uniquely situated at the junction of the Honshu and Kuril arcs. Eastern H... | Hayato (2016) - Hokkaido_translated.txt
2g
Hokkaido
HAYATO UEDA
Hokkaido is the northmost of the four main islands of Japan
and lies between Honshu Island to the SW, the neighboring
far-east Russian territories such as Sakhalin Island to the north,
Primorye (Sikhote-Alin) to the west and the Kuril islands to the
east. ... |
Based on this research, what are the key findings regarding the composition of Kurile arc magmas in NE Hokkaido, Japan, how do these findings relate to subduction processes, and what is the broader geological context that motivated this study, including relevant concepts and terms? | This research paper investigates the composition of Pleistocene to recent Kurile arc magmas in NE Hokkaido, Japan, to understand the subduction components involved in their genesis.
**Key Findings and Results:**
* The study found that the Kurile arc lavas, including rhyolitic pumice, rhyolite, dacite, andesite, and... | Hoang (2011) - Subduction components in Pleistocene to recent Kurile arc magmas in NE Hokkaido, Japan_translated.txt
Journal of Volcanology and Geothermal Research 200 (2011) 255-266
ELSEVIER
Contents lists available at ScienceDirect
Journal of Volcanology and Geothermal Research
journal homepage: www.elsevier.com/loca... |
This research paper investigates the distribution of Helium isotope ratios in North Kyushu, Japan. Considering the region's complex tectonic setting, what are the key findings regarding the spatial distribution of 3He/4He ratios, what important concepts and definitions are relevant to interpreting these findings, and w... | This study investigates the geographical distribution of 3He/4He ratios in hot spring gases from North Kyushu, Japan, a region with a complex tectonic setting at the intersection of the SW Japan arc and the Ryukyu arc. The key findings reveal a heterogeneous distribution of 3He/4He ratios: relatively high ratios (4-8 R... | Horiguchai He ratios in Kyushu.txt
Geographical distribution of3He/4He ratios in north Kyushu, Japan:
Geophysical implications for the occurrence of mantle-derived fluids
at deep crustal levels
Keika Horiguchi ⁎, Jun-ichi Matsuda
Department of Earth and Space Science, Graduate School of Science, Osaka University, Toyon... |
Based on the Sr-Nd-Pb isotopic compositions of volcanic rocks around the Hishikari gold deposit, what are the key findings and results regarding the source characteristics and evolution of these volcanic rocks, particularly in relation to gold mineralization? What key concepts like 'Dupal anomaly,' 'assimilation,' and ... | This research investigates the Sr-Nd-Pb isotope compositions of Late Pliocene to Pleistocene volcanic rocks (HVR) around the Hishikari gold deposit in southern Kyushu, Japan, to understand their source characteristics, evolution, and relationship to gold mineralization. The study's key findings are:
1. **Two Distinct... | Hosono 2003 SrNd isotopes of volcanic rocks around Hishikari gold deposit SW Japan.txt
CHEMICAL GEOLOGY ISOTOPEGEOSCIENCE ELSEVIER Chemical Geology 201 (2003) 19-36 www.elsevier.com/locate/chemgeo Sr-Nd-Pb isotopic compositions of volcanic rocks around the Hishikari gold deposit, southwest Japan: implications for the c... |
Based on this research, what are the key findings regarding fluoride enrichment in groundwater in the western Kumamoto area of Japan, what are the important geochemical concepts and processes involved, and what background and context motivated this study? | This research paper investigates the geochemical processes controlling fluoride enrichment in groundwater in the western Kumamoto area, Japan, a region where groundwater is the sole source of drinking water for about 1 million people. The study was motivated by the detection of high fluoride concentrations (up to 4.5 m... | Hossain 2016 geochemistry of F Kumanoto.txt
Water Air Soil Pollut (2016) 227: 385 ssMarl DOI 10.1007/s11270-016-3089-3 Geochemical Processes Controlling Fluoride Enrichment in Groundwater at the Western Part of Kumamoto Area, Japan Shahadat Hossain · Takahiro Hosono · Heejun Yang · Jun Shimada Received: 14 December 201... |
Based on the research paper, what are the key findings regarding the origin of the Yakuno ophiolite, considering its petrochemistry and geological context? What key concepts, such as back-arc basin basalts (BABB), mid-ocean ridge basalts (MORB), and ophiolites are essential to understanding these findings? Also, what b... | This research paper investigates the origin of the Permian Yakuno ophiolite in Japan, focusing on its petrochemistry. The key finding is that the Yakuno ophiolite likely originated from an early-stage back-arc basin setting rather than an oceanic plateau, as previously suggested. This conclusion is supported by several... | Ichiyama (2004) Petrochemical evidence for off_ridge magmatism in a back_arc setting from the Yakuno.txt
The Island Arc
(2004)
13,
157–177
Blackwell Science, LtdOxford, UKIAR
The Island Arc
1440-17382004 Blackwell Publishing Asia Pty LtdMarch 2004131157177Research Article
Off-ridge, back-arc magmatism of Y ... |
Based on this research paper, what were the key findings regarding the Permian ferropicritic rocks from the Mino-Tamba belt in SW Japan, and how do these findings relate to important concepts such as HIMU magma, recycled oceanic crust, and Permian mantle plumes, especially considering the geological context and motivat... | This research paper focuses on the geochemistry and isotopic characteristics of Permian ferropicritic and picritic ferrobasalt rocks found as dikes within the Jurassic accretionary complexes of the Mino-Tamba belt in SW Japan. The key findings are:
* **High MgO and FeO* Content:** The rocks are characterized by high... | Ichiyama (2006) geochemistry of ferropictritic rocks from the Tmba belt.txt
Available online at www.sciencedirect.com SCIENCE Cdirect? LITHOS ELSEVIER Lithos 89 (2006) 47-65 www.elsevier.com/locate/lithos Geochemical and isotopic constraints on the genesis of the Permian ferropicritic rocks from the Mino-Tamba belt, SW... |
This research paper investigates amphibolite blocks within the Omi serpentinite mélange in Japan. Considering the background of Early Paleozoic high-pressure metamorphic rocks in Japan, the key concepts of serpentinite mélanges and U-Pb dating, and the study's focus on understanding the tectonic regime during subductio... | This research paper investigates amphibolite blocks within the Omi serpentinite mélange in central Japan to understand the tectonic regime during the subduction initiation of the proto-Japan continent. The key findings are:
* **Key Findings and Results:**
* The studied amphibolites, collected from two location... | Ichiyama (2020) Geochemistry and magmatic U-Pb dating in Omi serpentinite melange.txt
Journal of Mineralogical and Petrological Sciences,Volume 115, page 313-321, 2020 Geochemistry and magmatic zircon U-Pb dating of amphibolite 0.703827 0.703374 Yuji ICHIYAMA*, Takahito KOSHIBA*f, Hisatoshi ITO** and Akihiro TAMURA*** ... |
Based on this research paper about the Takadomari Serpentinites in the Kamuikotan Ophiolite Belt, Hokkaido, Japan, what are the key findings regarding the structure, composition, and serpentinization process of the Takadomari serpentinite mass? Also, what is the geological background and context of this research, inclu... | This research paper focuses on the Takadomari serpentinite mass within the Kamuikotan Ophiolite Belt in Hokkaido, Japan. The **key findings and results** are as follows:
* The Takadomari serpentinite mass is a large (over 10x12 km) tectonic unit representing a dismembered ophiolite.
* It exhibits an east-facing la... | Igarashi (1985) - The Takadomari Serpentinites in the Kamuikotan Ophiolite Belt, Hokkaido, Japan_translated.txt
HOKKAIDO UNIVERSITY
Q
Title
The Takadomari Serpentinites in the Kamuikotan Ophiolite Belt, Hokkaido, Japan
Author(s)
Igarashi, Toshihiko; Katoh, Takayuki; Niida, Kiyoaki
Citation
Bulletin of the Faculty of Sc... |
Based on this research paper, what are the key findings and results regarding the magmatism in the Kinki district of SW Japan around 105 Ma? What are the important concepts discussed, such as adakites, lamprophyres, and mantle metasomatism? Finally, what is the background context and motivation for this study, includin... | This research paper focuses on the Early Cretaceous magmatism (around 105 Ma) in the Kinki district of SW Japan, specifically examining lamprophyres, adakitic granitoids, and hornblende peridotite xenoliths. Key findings include:
* **Episodic Magmatism:** The research confirms a short-lived episode of magmatism betw... | Imaokka 2014 Magmatism 105Ma Kinki SW Japan.txt
tigorite is relatively rich in Fe resulting in low Xmg (Figs. Contents lists available at ScienceDirect Lithos ELSEVIER journal homepage: www.elsevier.com/locate/lithos textural and chemical equilibration with retrograde oliv- ossMark pentinized peridotites of ophiolites:... |
Based on this research paper, what are the key findings regarding the marine shallow-water hydrothermal activity in the Wakamiko crater, including the important concepts used to understand the system, and what background context motivated this research? | This research paper investigates the marine shallow-water hydrothermal system in the Wakamiko crater in Kagoshima Bay, southern Kyushu, Japan. The key findings and results are as follows:
* **Hydrothermal Fluid Emanation:** Submarine hydrothermal fluid emanates from a small sediment mound within the Wakamiko crater,... | Ishibashi 2008 marine hydrothermal Kyushu.txt
Available online at www.sciencedirect.com ScienceDirect Journal of volcanology and geothermal research ELSEVIER Journal of Volcanology and Geothermal Research 173 (2008) 84-98 www.elsevier.com/locate/jvolgeores Research paper Marine shallow-water hydrothermal activity and ... |
Based on the Ishibashi (2022) paper on the Hatchobaru geothermal field, what are the key findings and results regarding the fluid chemistry, estimated reservoir temperature, isotopic ratios, and fluid types? What important concepts like chemical geothermometry and magmatic volatiles are used? Finally, describe the back... | The Ishibashi (2022) paper presents a geochemical analysis of geothermal fluids from the Hatchobaru geothermal field in Kyushu, Japan.
**Key Findings and Results:**
* **Fluid Chemistry:** The fluid chemistry is similar to that reported in earlier studies. The study confirms the presence of two types of geothermal f... | Ishibasi (2022) Gas geochemistry of geothermal fluids from the Hatchobaru geothermal field.txt
Geothermics 102 (2022) 102379 Contents lists available at ScienceDirect GEOTHERMICS Geothermics ELSEVIER journalhomepage:wv ate/geothermics Gas geochemistry of geothermal fluids from the Hatchobaru geothermal field, Japan Jun... |
What are the key findings regarding the geochemistry of Neogene Nansatsu volcanic rocks in South Kyushu, Japan, as presented in this research, including the background context of the study and the important concepts used to interpret the data? | This research focuses on the geochemistry of Neogene Nansatsu volcanic rocks in South Kyushu, Japan, to understand their origin and relationship to other igneous activities in the region. The background context is that South Kyushu is located at the junction of the southwest Japan and Ryukyu arcs, a zone of intense ign... | Ishida 2024Geochemistry of Neogene Nansatsu volcanic rocks in South Kyushu Japan.txt
Taylor & Francis Geology International Geology Review Review ISSN: (Print) (Online)Journal homepage: www.tandfonline.com/journals/tigr20 Geochemistry of Neogene Nansatsu volcanic rocks in South Kyushu, Japan Mizuki Ishida, Shumpei Mur... |
Based on Ishiwatari (2003), what are the key findings regarding the petrological diversity and origin of ophiolites in Japan and Far East Russia, including the newly defined DH-type ophiolite, and how does this diversity relate to the tectonic setting and processes in the northwestern Pacific margin? | This research paper by Ishiwatari (2003) focuses on the petrological diversity and origin of ophiolites in Japan and Far East Russia. The key findings and results are centered around the classification and characterization of ophiolites, particularly the introduction of a new type: depleted harzburgite-type (DH-type) o... | Ishiwatari (2003) - Petrological diversity and origin of ophiolites in Japan.txt
Petrological diversity and origin of ophiolites in Japan and Far East
Russia with emphasis on depleted harzburgite
AKIRA ISHIWATARI 1, SERGEI D. SOKOLOV 2 & SERGEI V. VYSOTSKIY 3
1Department of Earth Sciences, Faculty of Science, Kanaza... |
Based on this research paper, what are the key findings regarding Paleozoic ophiolites and blueschists in Japan and Russian Primorye, what important concepts are used to interpret these findings, and what is the background and motivation behind this study? | This research paper investigates the geological continuity between Japan and Russian Primorye by studying Paleozoic ophiolites and high-pressure (HP) metamorphic rocks (blueschists) on both sides of the Japan Sea. The key findings are:
* **Presence of Early Paleozoic Ophiolites:** The authors confirm the existence o... | Ishiwatari (2003) Paleozoic ophiolites and blueschists in Japan and Russian Primorye in the tectonic.txt
The Island Arc
(2003)
12,
190–206
Blackwell Science, LtdOxford, UK
IARThe Island Arc1038-48712003 Blackwell Science Asia
122June 2003
390
Paleozoic ophiolites and blueschists
A. Ishiwatari and T . Tsujimori... |
Based on this chapter, what are the key findings regarding the distribution and characteristics of ophiolites and ultramafic rocks in Japan, what fundamental concepts related to ophiolites are discussed, and what is the broader geological context that motivates this research? | This chapter focuses on the distribution, mineralogical diversity, geochemical characteristics, and petrogenetic importance of mafic and ultramafic igneous rocks, particularly ophiolites and ultramafic xenoliths, in Japan. The key findings are that ophiolites and ultramafic rocks are distributed throughout Japan, with ... | Ishiwatari (2016) - Ophiolite and ultramafic rocks_translated.txt
3
Ophiolites and
Ultramafic rocks
AKIRA ISHIWATARI, KAZUHITO OZAWA, SHOJI ARAI,
SATOKO ISHIMARU, NATSUE ABE & MIYUKI TAKEUCHI
This chapter describes the geologic occurrences, mineralogical and
geochemical diversity and petrogenetic importance of the mafi... |
Based on this research paper, what are the key findings regarding the distribution and characteristics of ophiolites and ultramafic rocks in Japan, what important concepts are defined and explained in relation to these rocks, and what is the broader background and context that motivates the study of these geological fe... | This research paper focuses on the geological occurrences, mineralogical and geochemical diversity, and petrogenetic importance of mafic and ultramafic igneous rocks (mainly plutonic) in Japan.
**Key Findings and Results:** The paper highlights that ophiolites and ultramafic rocks are distributed throughout Japan, wi... | Ishiwatari (2016) - Ophiolites and ultramafic rocks_translated.txt
3
Ophiolites and
Ultramafic rocks
AKIRA ISHIWATARI, KAZUHITO OZAWA, SHOJI ARAI,
SATOKO ISHIMARU, NATSUE ABE & MIYUKI TAKEUCHI
This chapter describes the geologic occurrences, mineralogical and
geochemical diversity and petrogenetic importance of the maf... |
Considering the research on ophiolites and ultramafic rocks in Japan, what are the key findings regarding their distribution, age relationships, and structural context across Japan, and how do these findings relate to the broader understanding of ophiolites as remnants of oceanic lithosphere and their tectonic emplacem... | This research paper focuses on the distribution, characteristics, and significance of ophiolites and ultramafic rocks in Japan. Key findings and results include:
* **Distribution:** Ophiolites and ultramafic rocks are found throughout Japan, with well-developed examples as large thrust slices (nappes) in Yakuno (SW ... | Ishiwatari (2016) Ophiolites and ultramafic rocks in Japan book chapter_translated.txt
3
Ophiolites and
Ultramafic rocks
AKIRA ISHIWATARI, KAZUHITO OZAWA, SHOJI ARAI,
SATOKO ISHIMARU, NATSUE ABE & MIYUKI TAKEUCHI
This chapter describes the geologic occurrences, mineralogical and
geochemical diversity and petrogenetic i... |
What are the key findings and results of the research on Paleozoic ophiolites and blueschists in Japan and Russian Primorye, what important concepts are discussed, and what is the background context motivating this study? | This research investigates the geological continuity between Japan and Russian Primorye by studying Paleozoic ophiolites and high-pressure (HP) metamorphic rocks (blueschists) on both sides of the Japan Sea. The key finding is the presence of early Paleozoic ophiolites on both sides, suggesting a possible connection. T... | Ishiwatari 2003 - Paleozoic ophiolites and blueschists in Japan.txt
The Island Arc
(2003)
12,
190–206
Blackwell Science, LtdOxford, UK
IARThe Island Arc1038-48712003 Blackwell Science Asia
122June 2003
390
Paleozoic ophiolites and blueschists
A. Ishiwatari and T . Tsujimori
10.1046/j.1038-4871.2003.00390.x
Ori... |
What are the key findings and results regarding the crustal structures and active tectonics of compressionally reactivated back-arc failed rifts in the Toyama trough, as revealed by the multiscale seismic profiling, and how do these findings relate to the background context of the Sea of Japan's formation and seismic h... | This research paper investigates the compressional reactivation of back-arc failed rifts in the Sea of Japan, specifically focusing on the Toyama trough and its southern extension. The background context is the formation of the Sea of Japan as a back-arc basin due to the subduction of the Pacific plate under the Eurasi... | ISHIYA~1.txt
Tectonophysics 710-711 (2017) 21-36 Contents lists available at ScienceDirect Tectonophysics ELSEVIER journal homepage: www.elsevier.com/locate/tecto Structures and active tectonics of compressionally reactivated back-arc ossMark failed rift across the Toyama trough in the Sea of Japan, revealed by multisc... |
Based on Ishizuka's research on the Horokanai Ophiolite, what are the key findings regarding its geochemistry and formation, including the background context of the study, the major rock types analyzed, and the important concepts used to interpret the results? | Ishizuka's 1981 study focused on the geochemistry of the Horokanai Ophiolite, located within the Kamuikotan tectonic belt in Hokkaido, Japan. The research aimed to understand the ophiolite's origin and tectonic setting by analyzing the bulk rock chemistry of representative rock types (basaltic rocks, gabbroic rocks, an... | Ishizuka (1981) - Geochemistry of the Horokanai Ophiolite_translated.txt
JOURNAL OF THE GEOLOGICAL SOCIETY OF JAPAN, Vol. 87, No. 1, p. 17-34, January, 1981
GEOCHEMISTRY OF THE HOROKANAI OPHIOLITE IN THE
KAMUIKOTAN TECTONIC BELT, HOKKAIDO, JAPAN
HIDEO ISHIZUKA*
Abstract The Horokanai ophiolite is situated within the Ka... |
Based on the research presented, what are the key findings regarding the age and composition of the chert member within the Horokanai ophiolite, what important radiolarian species were identified and what is the significance of these findings in the context of the Kamuikotan zone in Hokkaido, Japan, and what is the geo... | The research paper focuses on the Horokanai ophiolite within the Kamuikotan zone in Hokkaido, Japan. The key finding is the identification of radiolarians within the chert member of the ophiolite, which allows for age determination. Specifically, the identified radiolarian assemblage suggests that the chert member is o... | Ishizuka (1983) - Latest Jurassic radiolarians from the Horokanai ophiolite.txt
JOURNAL OF THE GEOLOGICAL SOCIETY OF JAPAN, Vol. 89, No.12, p. 731-732, December, 1963 OPHIOLITE INTHE KAMUIKOTANZONE HOKKAIDO,JAPAN HIDEO ISHIZUKA*,MAKOTo OKAMURA*and YAsUJ1 SAITO** The Horokanai ophiolite,occurring within the Kamuikotan z... |
Based on Ishizuka's study of the Horokanai Ophiolite, what are the key findings regarding its metamorphism, what are the important concepts related to the metamorphic facies observed, and what is the geological background and context that makes this ophiolite significant? | Ishizuka's 1984 study of the Horokanai Ophiolite in the Kamuikotan Zone of Hokkaido, Japan, reveals several key findings about its prograde metamorphism. The most important result is the identification of a progressive increase in metamorphic grade downwards through the ophiolite pseudostratigraphy. This progression ra... | Ishizuka (1984) - Prograde metamorphism of the Horokanai Ophiolite.txt
Prograde Metamorphism of the Horokanai Ophiolite
in the Kamuikotan Zone, Hokkaido, Japan
by HIDEO ISHIZUKA
Department of Geology, Kochi University, Kochi 780, Japan
(Received 27 April 1984; in revised form 15 October 1984)
ABSTRACT
The Horokanai oph... |
Based on Ishizuka's 1987 paper on the Horokanai Ophiolite, what are the key findings regarding its igneous and metamorphic petrology, including its geological context, major rock types, geochemical characteristics, metamorphic zones, and the interpretation of its metamorphic history? | Ishizuka's 1987 paper presents a detailed petrological study of the Horokanai Ophiolite, which is part of the Kamuikotan subduction complex in Hokkaido, Japan, and was emplaced as a nappe during the late Mesozoic. The research aims to understand the ophiolite's origin and metamorphic history in the context of plate tec... | Ishizuka (1987) - Igneous and metamorphoc petrology of the Horokanai Ophiolite.txt
Memoirs of the Faculty of Science, Kochi University Series E, Geology. Vol. 8. p. 1-70, pls. 1-6, March, 1987. <0.01 IGNEOUS AND METAMORPHIC PETROLOGY OF THE HOROKANAI OPHIOLITE IN THE KAMUIKOTAN ZONE. <0.01 0.221 <0.01 ly emplaced as a ... |
What are the key findings and results of the study on the Kagura Igneous Rocks (KIR) in the South Kitakami Terrane, Northeast Japan, and how do these findings support the proposed Ordovician-Early Silurian backarc setting for these rocks? Furthermore, describe the background and context of the research, including the p... | The study on the Kagura Igneous Rocks (KIR) in the South Kitakami Terrane, Northeast Japan, reveals key geochemical signatures indicative of a supra-subduction zone tectonic setting and a backarc origin. The most important findings are that the metadolerite and metabasalt of the KIR exhibit a tholeiite trend, low TiO2 ... | Island Arc - 2016 - Uchino - Ordovician backarc_basin metadolerite and metabasalt of the South Kitakami Terrane Northeast.txt
Research Article
Ordovician backarc-basin metadolerite and metabasalt of the South
Kitakami Terrane, Northeast Japan
TAKAYUKI UCHINO ,1,*AND MAKOTO KAWAMURA2
1Geological Survey of Japan, AIST ,... |
Based on this research paper, what are the key U-Pb zircon geochronological and oxygen isotope findings in the Kamioka area of the Hida Belt, and how do these findings contribute to understanding the timing of mylonitization in the Funatsu Shear Zone, the relationship between the Hida Belt and regional metamorphism, an... | This research paper focuses on U-Pb zircon geochronology and oxygen isotope analysis of rocks in the Kamioka area of the Hida Belt, Southwest Japan, to understand the timing of mylonitization in the Funatsu Shear Zone and the broader tectonic context of the region.
**Key Findings and Results:**
* The granitic mylon... | Island Arc - 2019 - Takehara - U Pb zircon geochronology of the Hida gneiss and granites in the Kamioka area Hida Belt.txt
RESEARCH ARTICLE
U–Pb zircon geochronology of the Hida gneiss and granites
in the Kamioka area, Hida Belt
Mami Takehara1| Kenji Horie1,2
1Geoscience Research Group, National
Institute of Polar Res... |
This research paper investigates blueschist-facies metamorphism in southwestern Japan. Considering the Paleozoic orogeny, what are the key findings regarding the Osayama blueschists within the serpentinite melange beneath the Oeyama ophiolite, what important concepts like serpentinite melange, blueschist facies, and K-... | This research paper focuses on the Osayama blueschists found within a serpentinite melange beneath the Oeyama ophiolite in southwestern Japan to understand the Paleozoic orogeny. The key findings are:
* **Blueschist-facies Metamorphism and Petrology:** The Osayama serpentinite melange contains blueschist-facies tect... | Island Arc - June 1999 - Tsujimori - Blueschist_facies metamorphism during Paleozoic orogeny in southwestern Japan.txt
Research Article
Blueschist-facies metamorphism during Paleozoic orogeny in
southwestern Japan: Phengite K–Ar ages of blueschist-facies tectonic
blocks in a serpentinite melange beneath early Paleozoic... |
Based on this research, what are the key findings regarding the geotectonic subdivision and evolution of the Japanese Islands as a subduction-related orogen, including the background that motivated this research, the major concepts used, and the resulting understanding of orogenic growth? | This research paper presents a revised geotectonic subdivision of the Japanese Islands based on accretion tectonics, contrasting with previous models based on geosynclines, continent-continent collision, or terrane tectonics. The research was motivated by advancements in microfossil and chronometric mapping of ancient ... | Island Arc - September 1996 - Isozaki - Anatomy and genesis of a subduction_related orogen A new view of geotectonic.txt
The Islaizd Arc (1996) 5, 289-320
Thematic Article
Anatomy and genesis of a subduction-related orogen:
A new view of geotectonic subdivision and
evolution of the Japanese Islands
YUKIO ISOZAKI ... |
Based on this research paper, what are the key findings regarding the geotectonic subdivision and evolution of the Japanese Islands, including the important concepts used in the analysis, and what background context motivated this new understanding? | This research paper presents a revised geotectonic subdivision of the Japanese Islands based on accretion tectonics, contrasting with previous models based on geosyncline, continent-continent collision, or terrane tectonics. The key findings are that the Japanese Islands are primarily composed of Late Paleozoic to Ceno... | Isozaki (1996) Anatomy and genesis of a subduction_related orogen A new view of geotectonic.txt
The Islaizd Arc (1996) 5, 289-320
Thematic Article
Anatomy and genesis of a subduction-related orogen:
A new view of geotectonic subdivision and
evolution of the Japanese Islands
YUKIO ISOZAKI
Department of Earth and ... |
Based on this research paper, what are the key findings and results regarding the geotectonic framework and evolution of the Japanese Islands, what important geological concepts are used to support these findings, and what is the historical background and motivation that led to this reappraisal? | This research paper presents a reappraisal of the geotectonic framework and evolution of the Japanese Islands, focusing on the subduction-related orogen. The key findings and results include:
* **Detection of a large mass of slab around the mantle boundary layer:** This suggests long-term oceanic subduction beneath ... | Isozaki (2010) New insight into a subduction-related orogen.txt
Gondwana Research 18(2010) 82-105 Contents lists available at ScienceDirect GRNSEAANA Gondwana Research ELSEVIER journal homepage: www.elsevier.com/locate/gr New insight into a subduction-related orogen: A reappraisal of the geotectonic framework and evolu... |
Based on this research paper, what were the key findings and results regarding the Permo-Triassic tectonics of Japan, including the important concepts involved, and what was the background and motivation for studying this period in Japanese geological history? | This research paper focuses on the Permo-Triassic tectonics of Japan, highlighting the unique setting where two distinct types of orogenic belts, accretionary and collisional, developed side-by-side.
**Background and Context:** The study is motivated by the importance of the Permo-Triassic period in establishing the ... | Isozaki 1997 Island Arc - March 1997 - Isozaki - Contrasting two types of orogen in Permo_Triassic Japan Accretionary versus (1).txt
The Island Arc (1997) 6, 2-24
Thematic Article
Contrasting two types of orogen in Permo-Triassic Japan:
Accretionary versus collisional
YUKIO ISOZAKI
Department of Earth and Planeta... |
What are the key findings regarding the petrogenesis of amphibole-rich ultramafic rocks in the Hida metamorphic complex, Japan, and how do these findings contribute to our understanding of arc crust differentiation, considering the background context of arc magmatism and the role of amphibole? | This research paper investigates the petrogenesis of amphibole-rich ultramafic rocks (specifically hornblende peridotite) within the Hida metamorphic complex in Japan, aiming to understand their role in arc crust differentiation. The background context is that arc magmatism is a fundamental process in creating continen... | Itano et al. 2021 Petrogenesis of amphibole-rich ultramafic rocks in the Hida metamorphic complex, Japan, Its role in arc crust differentiation.txt
LITHOS 404-405(2021)106440 Contents lists available at ScienceDirect OHL LITHOS ELSEVIER journal homepage: wv .com/locate/lithos Research Article Petrogenesis of amphibole-... |
Based on the 'Southwest Japan 2002' seismic experiment, what are the key findings regarding the crustal structure of southwest Japan, particularly concerning the Median Tectonic Line (MTL) and the composition of the island arc? How does this experiment build upon previous research, and what background information is es... | The 'Southwest Japan 2002' seismic experiment provides a crustal-scale cross-section of southwest Japan, revealing two key findings. First, the Japanese island arc is composed of two distinct crustal blocks juxtaposed by the Median Tectonic Line (MTL). Second, the MTL's activity began during the Late Cretaceous, associ... | Ito (2009) crustal structure of SW Japan by seismic experiment.txt
Tectonophysics 472 (2009) 124-134 Contents lists available at ScienceDirect Tectonophysics ELSEVIER journalhomepage: Crustal structure of southwest Japan, revealed by the integrated seismic experiment SouthwestJapan 2002 Tanio Ito a*, Yuji Kojima b, Shu... |
Based on the 'Southwest Japan 2002' integrated seismic experiment, what are the key findings regarding the crustal structure of southwest Japan, and how do these findings build upon previous understanding of the Median Tectonic Line (MTL)? Furthermore, explain the background and motivation for conducting this experimen... | The 'Southwest Japan 2002' integrated seismic experiment revealed several key findings about the crustal structure of southwest Japan. Firstly, it demonstrated that the Japanese island arc is composed of two distinct crustal blocks juxtaposed by the Median Tectonic Line (MTL). Secondly, the study suggested that the MTL... | Ito et al. 2009 Crustal structure of southwest Japan, revealed by the integrated seismic experiment Southwest Japan 2002.txt
Tectonophysics 472 (2009) 124-134 Contents lists available at ScienceDirect Tectonophysics ELSEVIER journalhomepage: Crustal structure of southwest Japan, revealed by the integrated seismic exper... |
Based on this research paper, what are the key findings regarding the basin formation and tectonic evolution of central Kyushu, Japan, focusing on the role of transcurrent faults and the Philippine Sea plate? Furthermore, what are the important geological concepts and tectonic features (like the Kokura-Tagawa Tectonic ... | The research paper investigates the basin formation and tectonic evolution of central Kyushu Island, Japan, specifically focusing on the influence of transcurrent fault systems and the subduction of the Philippine Sea plate.
**Key Findings and Results:**
* The central part of Kyushu is an active arc-volcanic regio... | Itoh (1997) History of basin formation and tectonic evolution central Kyushu island.txt
ELSEVIER Tectonophysics 284 (1998) 135-150 TECTONOPHYSICS
History of basin formation and tectonic evolution at the termination of
a large transcurrent fault system: deformation mode of central Kyushu,
Japan
Yasuto Itoh a,*, Kei... |
Based on the research paper, what are the key findings regarding the deformation mode in the frontal edge of the arc-arc collision zone in southern central Hokkaido, Japan? Elaborate on the subsurface geology revealed by seismic and drilling surveys, the activity and propagation of thrust faults, and the rotational mot... | The research paper by Itoh et al. (2005) investigates the deformation mode in the frontal edge of a Cenozoic arc-arc collision zone in southern central Hokkaido, Japan. The key findings and results are as follows:
* **Subsurface Geology and Thrust Faults:** Reflection seismic and drilling surveys revealed the geolog... | Itoh (2005) - Deformation mode in the frontal edge of an arc-arc collision zone.txt
Available online at www.sciencedirect.com TECTONOPHYSICS SCIENC DIRECT ELSEVIER Tectonophysics 395 (2005) 81-97 www.elsevier.com/locate/tecto Deformation mode in the frontal edge of an arc-arc collision zone: subsurface geology, active ... |
Based on this research, what are the key findings regarding groundwater circulation around the Aso and Kuju Volcanoes, what important concepts and methods were used to arrive at these findings, and what background motivated this research? | This research paper investigates groundwater circulation around the Aso and Kuju Volcanoes in Southwest Japan using geochemical data and multivariate statistical analysis. The key findings are:
* **Key Findings and Results:**
* The application of whitened data-based k-means cluster analysis (KCA) to the geoche... | Iwamori 2023 groundwater Aso Volcano SW japan.txt
Journal of Volcanology and Geothermal Research 433 (2023) 107739 Contents lists available at ScienceDirect 二 VOLCANOLOGY Journal of Volcanology and Geothermal Research ELSEVIER journal homepage: www.journals.elsevier.com/journal-of-volcanology-and-geothermal-research Gr... |
Based on this research paper, what are the key findings regarding the seismological features of the island arc crust in Japan, including the observed crustal structure, velocity variations, seismic activity distribution, and deformation styles? How do these findings relate to the background context of plate tectonics a... | This research paper by Iwasaki et al. (2002) investigates the seismological features of the island arc crust in Japan based on recent seismic expeditions. The study's key findings and results include:
* **Crustal Heterogeneity:** The upper crust in the Japanese islands exhibits significant heterogeneity, characteriz... | Iwasaki (2002) - Seismological geatures of island arc crust.txt
Seismological features of island arc crust as inferred from
recent seismic expeditions in Japan
Takaya Iwasakia,*, Toshikatsu Yoshiia, Tanio Itob, Hiroshi Satoa, Naoshi Hirataa
aEarthquake Research Institute, University of Tokyo, Yayoi 1-1-1, Bunkyo, Tokyo... |
Based on the seismic refraction/wide-angle reflection experiments conducted across Hokkaido, Japan, what are the key findings regarding the upper and middle crustal deformation resulting from the arc-arc collision, what are the important geological and geophysical concepts used in the study, and what is the background ... | This research paper investigates the upper and middle crustal deformation in the Hidaka Collision Zone (HCZ) in central Hokkaido, Japan, a region formed by the collision of the Kuril Arc (KA) with the Northeast Japan Arc (NJA) since the middle Miocene. The motivation behind the study is to understand the crustal evolut... | Iwasaki (2004) - Upper and middle crust deformation of an arc-arc collision.txt
Availableonline at www.sciencedirect.com TECTONOPHYSICS SCIENC DIRECT ELSEVIER Tectonophysics 388(2004)59-73 www.elsevier.com/locate/tecto Upper and middle crustal deformation of an arc-arc collision across Hokkaido, Japan, inferred from se... |
Based on the seismic refraction study conducted in the Kitakami region of Northern Honshu, Japan, what are the key findings regarding crustal structure, particularly concerning velocity variations, Moho depth, and the VP/VS ratio? Furthermore, what background information and geological context motivated this study, and... | This research paper presents the results of a seismic refraction experiment conducted in the Kitakami region of Northern Honshu, Japan, with the primary goal of revealing the detailed structure of the lower crust and upper mantle. The study was motivated by the Japanese Earthquake Prediction Program, specifically the 6... | Iwaskai et al. 1993 Seismic Refraction Study in the Kitakami Region, Northern Honshu, Japan.txt
J. Phys. Earth, 41, 165-188, 1993
Seismic Refraction Study in the Kitakami Region,
Northern Honshu, Japan
Takaya Iwasaki,1,õ Toshikatsu Yoshii,1 Takeo Moriya,2
Akio Kobayashi,3 Makoto Nishiwaki,4 Tomoki Tsutsui,5,*
Ta... |
Based on zircon geochronology, Sr-Nd-Hf isotopic and geochemical analyses, what are the key findings regarding the generation of Cenozoic granitoids in Hokkaido, Japan, how do these findings relate to the broader context of crustal growth and the tectonic evolution of the Japanese Islands, and what are the important co... | This research paper investigates the generation and source characteristics of Paleogene and Neogene granitoids in central Hokkaido (Hidaka Belt), Japan, to assess the crustal composition of Hokkaido and examine the general problem of continental growth. The key findings are:
* **Zircon Geochronology:** New zircon da... | Jahn (2014) - Generation of Cenozoic granitoids in Hokkaido.txt
GENERATION OF CENOZOIC GRANITOIDS IN HOKKAIDO (JAPAN):
CONSTRAINTS FROM ZIRCON GEOCHRONOLOGY, Sr-Nd-Hf
ISOTOPIC AND GEOCHEMICAL ANALYSES, AND IMPLICATIONS FOR
CRUSTAL GROWTH
BOR-MING JAHN*,†, MASAKO USUKI*, TADASHI USUKI**,
and SUN-LIN CHUNG*
ABSTRACT. The... |
Based on this research, what are the key findings regarding the geotectonic subdivision of the Sangun belt, including the identification of the Renge and Suo belts, their distinct characteristics (age, metamorphic facies, associated rocks), and their spatial distribution within the Inner Zone of Southwest Japan? Additi... | This research paper challenges the long-held view of the Sangun belt as a single, coherent glaucophanitic terrane of Permian to Triassic age paired with the low-P/T Hida belt. The key finding is that the Sangun belt is actually composed of two distinct geologic units: the older Renge belt and the younger Suo belt.
**... | Journal Metamorphic Geology - 2004 - NISHIMURA - Geotectonic subdivision and areal extent of the Sangun belt Inner Zone of.txt
J. metamorphic Geol., 1998, 16,129–140
Geotectonic subdivision and areal extent of the Sangun belt, Inner
Zone of Southwest Japan
Y. NISHIMURA
Department of Earth Sciences, Faculty of Science,... |
Based on aeromagnetic data and other geological evidence, what are the key findings regarding the Early Cretaceous Kitakami magmatic arc in northeast Japan, including its subsurface structure, the tectonic context of its formation and subsequent modification, and what implications does this have for understanding the m... | This research paper uses aeromagnetic anomalies, supported by drilling data and modeling, to delineate the buried plutonic roots of the Early Cretaceous Kitakami magmatic arc in northeast Japan. The key finding is the identification of a large, previously unmapped batholith underlying the region, which is interpreted a... | Journal of Geophysical Research Solid Earth - 10 November 1994 - Finn - Aeromagnetic evidence for a buried Early.txt
JOURNAL OF GEOPHYSICAL RESEARCH, VOL. 99, NO. Bll, PAGES 22,165-22,185, NOVEMBER 10, 1994
Aeromagnetic evidence for a buried Early Cretaceous
magmatic arc, northeast Japan
Carol Finn
U.S. Geological... |
Based on this research, what are the key findings regarding the metamorphic history of the Wakasa blueschist in the Renge belt, SW Japan, including the P-T conditions for each metamorphic stage? Additionally, explain the essential concepts like pseudosection modeling, clockwise P-T paths, and isothermal decompression, ... | This research paper investigates the metamorphic history of blueschists exposed in the Wakasa area of the Renge metamorphic belt in SW Japan. The key findings reveal a three-stage metamorphic evolution: prograde, peak, and retrograde. The prograde stage is characterized by minerals like chlorite, epidote, phengite, alb... | Kabir 2021 Metamorphism Wakasa blueschist Renge SW Japan75_19_translated.txt
Earth Science (Chikyu Kagaku) vol. 75, 19-32. 2021
Metamorphism of the Wakasa blueschist, Renge belt, SW Japan: metamorphic phase
Equilibria and P-T path
KABIR Md. Fazle* and TAKASU Akira**, ***
Abstract Blueschists exposed in the Wakasa are... |
What are the key findings and results, important concepts and background context of the research in 'Kagami 2006 Paleo Mes seds SW Japan'? | Based on the research paper 'Kagami 2006 Paleo Mes seds SW Japan', the key findings and results include Kagami 2006 Paleo Mes seds SW Japan.txt
Available online at www.sciencedirect.com SCIENCE DIRECT? ELSEVIER Gondwana Research 9 (2006) 142 - 151 Provenance of Paleozoic-Mesozoic sedimentary rocks in the Inner Zone of ... | Kagami 2006 Paleo Mes seds SW Japan.txt
Available online at www.sciencedirect.com SCIENCE DIRECT? ELSEVIER Gondwana Research 9 (2006) 142 - 151 Provenance of Paleozoic-Mesozoic sedimentary rocks in the Inner Zone of Southwest Japan: An evaluation based on Nd model ages 1 1e 1 11 1 q o *e T. Hamamoto f, Y. ... |
Based on this research paper, what are the key findings and results regarding the tectonic activity on Kyushu Island, including the important concepts like the Median Tectonic Line and the Hohi volcanic zone, and what background context and motivation led to this investigation? | This research paper focuses on the tectonics of Kyushu Island, located at the junction of the Southwest Japan Arc and the Ryukyu Arc, and investigates three synchronous geologic events that occurred during the last 6 million years. The key findings are: (1) resumed dextral displacement along a 100 km section of the Med... | Kamata 1994 tectonic arc arc junction Kyushu Island.txt
TECTONOPHYSICS ELSEVIER Tectonophysics 233 (1994) 69-81 Tectonics of an arc--arc junction: an example from Kyushu Island at the junction of the Southwest Japan Arc and the Ryukyu Arc Hiroki Kamata a, Kazuto Kodama b Osaka Offce, Geological Survey of Japan, Govern... |
Based on this research, what are the key findings regarding the Quaternary volcanic front at the junction of the South-west Japan Arc and the Ryukyu Arc, specifically addressing the background context of the Hohi volcanic zone (HVZ), important concepts related to volcanic front formation, and the results linking volcan... | This research investigates the Quaternary volcanic front at the junction of the South-west Japan Arc and the Ryukyu Arc, focusing on the Hohi volcanic zone (HVZ) on Kyushu Island. The background context is that the volcanic front, defined as the trenchward limit of volcanoes in a subduction zone, typically lies about 1... | kamata 1998 quaternary volcanic front ajapan Arc and Ryukyu Arc 1998.txt
Quaternary volcanic front at the junction of the South-west
Japan Arc and the Ryukyu Arc
Hiroki Kamata*
Osaka Center, Geological Survey of Japan, Gov. Bldg. No. 2, 4-1-67, Otemae, Chuo-ku,
Osaka 540, Japan
(Received 6November 1996; Accepted 5June ... |
Based on this research paper, what are the key findings regarding the Shiraishino granodiorite on Kyushu Island, how does it relate to the broader understanding of Cretaceous granitic rocks in southwestern Japan, and what are the key concepts and background that motivate this research? | This research paper focuses on the Shiraishino granodiorite, an adakitic pluton on Kyushu Island in southwestern Japan. The key findings are that the Shiraishino granodiorite, with an outcrop area of approximately 15 km², exhibits geochemical characteristics (Sr, Y, and rare earth element concentrations) and crystalliz... | Kamei 2004 adakiti pluton kyushu.txt
An adakitic pluton on Kyushu Island, southwest Japan arc
Atsushi Kamei *
Research Center for Deep Geological Environments, Geological Survey of Japan, National Institute of Advanced Industrial Science and Technology,
Tsukuba Central 7, Tsukuba 305-8567, Japan
Received 20 December 20... |
What are the key findings and results of this research on the Kurosegawa belt in the Yatsushiro area, Kyushu, Japan, including the important concepts related to metamorphic facies and the background context that motivated the study? | This research paper focuses on the Kurosegawa belt in the Yatsushiro area, Kyushu, Japan, and presents the key finding of the common occurrence of prehnite and pumpellyite in metabasites of the Tobiishi sub-unit. This is significant because previous mapping by Ueta (1961) had identified this area as belonging to the gr... | kamimura 2012 prehnite pumpellyite Kurosegawa bely Yatsushiro.txt
77 LETTER 42 the Kurosegawa belt in Yatsushiro area, Kyushu, Japan 54 162 Kitashirakawa Oiwakecho, Kyoto 606-8502, Japan **Nittetsu-Kogyo Co., Ltd, 2-3-2 Marunouchi, Chiyoda, Tokyo 100-8377, Japan. Common occurrence of prehnite and pumpellyite is newly i... |
What are the key findings and results of the study on the Tottabetsu plutonic complex (TPC), what are the key scientific concepts used in this study, and what is the background and context that motivated this research? | This study investigates the Tottabetsu plutonic complex (TPC) in Hokkaido, northern Japan, which offers a rare exposed cross-section of a tilted pluton. The **background** is that most plutons are only exposed horizontally, limiting information on their vertical structure, lithology, and internal variations. Geophysica... | Kamiyama (2005) - Gravity and density variations of the tilted Tottabetsu plutonic complex.txt
E-LETTER Earth Planets Space ,57, e21–e24, 2005
Gravity and density variations of the tilted Tottabetsu plutonic complex,
Hokkaido, northern Japan: implications for subsurface intrusive
structure and pluton development
Hiroyu... |
What were the key findings regarding the origin and composition of the hypersaline liquid sampled from well WD-0a in the Kakkonda geothermal system, and how did the background context of geothermal exploration and drilling in the Kakkonda field influence this research? | This research paper investigates the origin of a hypersaline, metal-rich liquid found at a depth of 2697m in the Kakkonda geothermal system, Japan, sampled from well WD-0a.
**Key Findings and Results:**
* **Hypersaline Liquid Composition:** The study found that the sampled liquid was a hypersaline brine, containin... | Kasai (1998) origin of hypersaline liquid from kakkonda gethermal system.txt
Geothermics Vol[ 16\ No[ 4:5\ pp[ 520534\ 0887
0887 CNR\Pergamon Elsevier Science Ltd
Printed in Great Britain[ All rights reserved
92645494:87 ,08[999[99
PII] S9264!5494"87#99926!5
THE ORIGIN OF HYPERSALINE LIQUID IN THE
QUATERNARY KAKKON... |
Based on the research by Kato et al. (2016) on the Poroshiri ophiolite, what are the key findings regarding the sinistral shear zones, including their characteristics, the metamorphic processes involved, and how they relate to the broader tectonic context of the Hidaka metamorphic belt? What are the important geologica... | The research by Kato et al. (2016) focuses on the discovery and characterization of meter-wide, NNW-trending sinistral shear zones within the Poroshiri ophiolite in southern central Hokkaido, Japan. The study's key findings are:
* **Discovery of Sinistral Shear Zones:** The primary finding is the identification of t... | Kato (2016) - Metamorphism and mylonization in sinistral shear zones found in the Poroshiri ophiolite_translated.txt
Jour. Geol. Soc. Japan, Vol. 122, No. 9, p. 461–475, September 2016
doi: 10.5575/geosoc.2016.0017
Metamorphism and mylonization in sinistral shear zones found in
The Poroshiri ophiolite
Akiyuki Kato**, K... |
This research paper investigates chromian spinel-bearing serpentinites in the Ise area of the Hida Marginal Belt (Japan). Considering this context, what are the key findings regarding the protoliths of these serpentinites, including their composition, degree of melting, and the behavior of certain elements during serpe... | The key findings of the research paper are as follows:
* **Protolith Composition:** The serpentinites in the Ise area are interpreted to have harzburgite protoliths. This is primarily based on the abundance of bastite (pseudomorphs after orthopyroxene) within the serpentinites. The chemical composition of bastite-te... | KHEDER~1.txt
Journal of Mineralogical and Petrological Sciences,Volume 106, page 255-260, 2011 LETTER Petrology and geochemistry of chromian spinel-bearing serpentinites in the Hida Marginal Belt (Ise area, Japan): characteristics of their protoliths Mohamed ZAKI KHEDR*** and Shoji ARAI *Department of Earth Sciences, G... |
What are the key findings and results, important concepts and background context of the research in 'Kimura (2019) - Zircon U-Pb age and Nd isotope geochemistry of Oeyama ophiolite'? | Based on the research paper 'Kimura (2019) - Zircon U-Pb age and Nd isotope geochemistry of Oeyama ophiolite', the key findings and results include Kimura (2019) - Zircon U-Pb age and Nd isotope geochemistry of Oeyama ophiolite.txt
Lithos 342-343 (2019) 345-360 Contents lists available at ScienceDirect Lithos ELSEVIER ... | Kimura (2019) - Zircon U-Pb age and Nd isotope geochemistry of Oeyama ophiolite.txt
Lithos 342-343 (2019) 345-360 Contents lists available at ScienceDirect Lithos ELSEVIER Zircon U-Pb age and Nd isotope geochemistry of latest Neoproterozoic to early Paleozoic Oeyama ophiolite: Evidence for oldest MORB-type oceanic crus... |
Based on the provided research paper, what are the key findings regarding the petrogenesis and U-Pb zircon geochronology of alkali volcanic rocks in the Akiyoshi Terrane, SW Japan, and how do these findings relate to the background context of understanding the origin and tectonic history of Phanerozoic oceanic crust in... | The research paper focuses on the petrogenesis and U-Pb zircon geochronology of alkali volcanic rocks within the Akiyoshi Terrane in Southwest Japan. The key findings and results include:
* **Age Determination:** The U-Pb zircon dating of a trachytic sample from the Yakawa area yielded a crystallization age of 335.8... | Kimura (2024) alkali volcanic rocks in the Akiyoshi terrane.txt
Journal of Mineralogical and Petrological Sciences (2024) 119:029 Petrogenesis and U-Pb zircon geochronology of alkali volcanic rocks in the Akiyoshi Terrane, SW Japan and their origin Kosuke KIMURA*t, Yasutaka HAYASAKA**, and Kaushik DAs***, *Department o... |
Based on this research, what are the key findings regarding the seismic attenuation structure beneath Hokkaido, and how do these findings relate to the arc-arc collision process, magmatism, seismotectonics, and the location of major earthquakes? Also, explain the background context and motivation for this research, inc... | This research paper focuses on imaging the detailed seismic attenuation structure (Qp) beneath Hokkaido, northeastern Japan, to understand the arc-arc collision process, magmatism, and seismotectonics in the region.
**Key Findings and Results:**
* The study successfully imaged the seismic attenuation structure (Qp)... | Kita (2014) - Detailed seismic attenuation structure beneath Hokkaido northeastern Japan Arc_arc.txt
Detailed seismic attenuation structure beneath
Hokkaido, northeastern Japan: Arc-arc
collision process, arc magmatism,
and seismotectonics
Saeko Kita1, Junichi Nakajima2, Akira Hasegawa2, Tomomi Okada2, Kei Katsumata3... |
Summarize the key findings regarding the origin of gases in the Takinoue geothermal area, including the methodology used to determine this origin, the crucial concepts related to geothermal systems discussed, and the background and motivation for conducting this research. | This research investigates the origin of gases in the Takinoue geothermal area in Japan, motivated by the need to better understand the sources of carbon and sulfur species in geothermal fluids, an area previously under-explored compared to water origin studies. The study builds upon previous work showing the presence ... | Kiyosu (1988) origin of some gases from Takinoue geothermal area.txt
Geochemical Journal, Vol. 22, pp. 183 to 193, 1988
Origin of some gases from
area inthe Takinoue geothermal
Japan
YASUHIRO Kiyosu' and YUTAKA YOSHIDA2
Department of Earth Sciences, School of Science, Nagoya University, Chikusa, Nagoy... |
Based on this paper, what are the key geological and structural differences between the north-central and south Ryukyu islands from the Late Mesozoic to the Quaternary, what important geological concepts and formations are discussed in relation to these differences, and what background context or motivation led to this... | This paper investigates the tectonic evolution of the Ryukyu Island arc, focusing on the geological and structural contrasts between the north-central and south Ryukyu islands. The background context is the existing debate and differing interpretations of the Ryukyu Island arc's formation, with previous studies linking... | kizaki 1978 tectonics of the ryukyu isaland arc.txt
J. Phys. Earth, 26, Suppl., S 301-S 307, 1978
TECTONICS OF THE RYUKYU ISLAND ARC
Koshiro KIZAKI
Geological Laboratory, University of the Ryukyus, Naha, Japan
(Received June 14, 1978; Revised August 26, 1978)
The geological and structural contrast between the north and... |
Based on this research paper, what are the key findings regarding the geochemistry of the Yakuno Ophiolite in Southwest Japan, including its relationship to MORB and oceanic island basalts? Also, describe the relevant geological context and the important concepts used to characterize the ophiolite. | The research paper investigates the geochemistry of the Yakuno Ophiolite in Southwest Japan, focusing on major element analyses and Sr isotope ratios of representative rocks. The key findings indicate that the Yakuno Ophiolite, part of the Maizuru Tectonic Belt, is composed of ultramafic, mafic, intermediate, and felsi... | Koide (1987) geochemistry of yakuno ophiolite in SW japan_translated.txt
Q
HOKKAIDO UNIVERSITY
Title
Geochemistry of the Y akuno Ophiolite in Southwest Japan
Author(s)
Citation
Koide, Yoshiyuki; Sano, Sakae; Ishiwatari, Akira; Kagami,
Hiroo
Bulletin of the Faculty of Science, Hokkaido University = Journal of the Facult... |
This research investigates long-term changes in volcanism in the Chokai-Kurikoma area of the Northeast Japan Arc. What were the key findings regarding the spatial and temporal distribution and chemistry of volcanism from the middle Miocene to Quaternary, what important concepts and terms are used to describe these chan... | This research paper focuses on the long-term spatial and temporal variations in volcanism within the Chokai-Kurikoma area of the Northeast Japan Arc, aiming to understand the evolution of subduction zone magmatism under constant subduction conditions. The background is that the Northeast Japan Arc has experienced stabl... | Kondo (2004) Long_term changes in distribution and chemistry of middle Miocene to Quaternary volcanism in.txt
The Island Arc
(2004)
13,
18–46
Blackwell Science, LtdOxford, UKIAR
The Island Arc
1440-17382004 Blackwell Publishing Asia Pty LtdMarch 20041311846Research Article
Volcanism in the Chokai-Kurikoma a... |
Based on this research, what are the key findings regarding the identification of a calcic analog of clinojimthompsonite in the Oeyama Ophiolite, including its geological context, methods used for identification, chemical composition, and structural characteristics? Also, what is the significance of this discovery in t... | This research paper reports the first discovery of a Ca-rich triple chain silicate, a calcic analog of clinojimthompsonite, of optical microscopic size, and a Ca-rich double/triple mixed chain structure, from the Oeyama Ophiolite in Southwest Japan.
**Background and Context:** The research builds upon the earlier dis... | Konishi (1993) calcic analog of clinojimthopsonite from Oeyama ophiolite_translated.txt
JOURNAL OF THE GEOLOGICAL SOCIETY OF JAPAN, Vol. 99, No. 8, p. 679-682, August 1993
Calcic analog of clinojimthompsonite from the
Oeyama Ophiolite, Southwest Japan
Hiromi Konishi*, Junji Akai** and Katsuki Kurokawa***
Key words: cli... |
This research investigates the crustal structure of the southwestern margin of the Kuril arc in eastern Hokkaido, Japan. Could you summarize the background and motivation for this study, the key findings and results regarding the crustal structure, and the important concepts that help interpret these findings, such as ... | This study aimed to clarify the crustal structure of the southwestern margin of the Kuril arc, located in eastern Hokkaido, Japan, which was previously not well understood. Hokkaido sits at the intersection of the Kuril and Northeast Japan arcs, and understanding the crustal structure of its eastern part, representing ... | Kurashimo (2007) - Crustal structure of the southwestern margin of the Kuril arc.txt
Earth Planets Space, 59, 375–380, 2007
Crustal structure of the southwestern margin of the Kuril arc sited in the
eastern part of Hokkaido, Japan, inferred from seismic
refraction/reflection experiments
Eiji Kurashimo1, Takaya Iwasaki1,... |
This research paper focuses on seismic imaging of the Southwest Japan arc. Can you describe the background and motivation for this study, outlining the key scientific concepts used, and summarize the most important findings and results regarding the velocity structure and its implications for megathrust earthquakes in ... | This research paper addresses the need for detailed three-dimensional (3-D) P- and S-wave velocity (Vp and Vs) models of the entire Southwest Japan arc, extending from the Nankai trough to the Japan Sea. The motivation stems from the complex tectonics of the region, where the Philippine Sea plate subducts beneath the E... | Liu (2013) Seismic imaging of southwest japan through nankai trough.txt
Physics of the Earth and Planetary Interiors 216 (2013) 59-73 Contents lists available at SciVerse ScienceDirect Physics of the Earth and Planetary Interiors ELSEVIER Seismic imaging of the Southwest Japan arc from the Nankai trough to the Japan Se... |
This research paper investigates the interaction of a spreading ridge and an accretionary prism in the Hidaka magmatic zone of Hokkaido, Japan. Considering this background, what are the key findings and results regarding the magmatism and crustal evolution in this zone? Furthermore, what are the important geological co... | This paper examines the Hidaka magmatic zone in Hokkaido, Japan, focusing on the interaction between a spreading ridge and an accretionary prism. The key findings and results are as follows:
* **Ridge-Trench Collision:** The Paleogene mafic plutons, which intruded a Late Cretaceous to early Paleogene accretionary pr... | Maeda (1996) - Interaction of a spreading ridge and an accretionary prism.txt
Interaction of a spreading ridge and an accretionary prism:
Implications from MORB magmatism in the Hidaka magmaticzone, Hokkaido, Japan
Jin’ichirou Maeda DepartmentofEarthandPlanetarySciences,GraduateSchoolofScience,HokkaidoUniversity,Sappor... |
This research investigates helium isotopes in groundwater near the Beppu-Shimabara graben in Kyushu, Japan, specifically focusing on the Saga Plain and the Shiroishi district. Considering this background, what were the key findings and results of the study regarding helium isotope ratios in the groundwater of the Saga ... | This research aimed to understand the origin and behavior of helium isotopes in groundwater within and near the Beppu-Shimabara graben, Kyushu, Japan, with a specific focus on the Saga Plain, an area experiencing land subsidence. The background context is that the Saga Plain is near an active graben with volcanism, sug... | mahara 2009 He isotopes Saga plain Beppu Shimabara Kyushu.txt
Applied Ge0chemistry 24(2009) 438-446 Contents lists available at ScienceDirect Applied Geochemistry ELSEVIER journal homepage: www.elsevier.com/locate/apgeochem Helium isotopic fingerprints of the heavy land subsidence left in groundwater of the Saga Plain,... |
Based on this research, what are the key findings regarding groundwater flow in the Kumamoto Plain, what important concepts and techniques were used to arrive at these findings, and what was the motivation behind this study? | This research investigates groundwater flow in the Kumamoto Plain, Japan, a volcanic aquifer system, using dissolved noble gases (specifically helium isotopes) as natural tracers. The key findings include the identification of two major groundwater flow paths: one buried by Aso pyroclastic flow along the old Kase River... | Maharara 1995 nobele gas in ground water BF00766749.txt
Environmental Geology (1995) 25:215 224 9 Springer-Verlag 1995
Y. Mahara
Noble gases dissolved in groundwater in a volcanic aquifer:
Helium Isotopes in the Kumamoto Plain
Received: 25 July 1994 / Accepted: 21 October 1994
Abstract This study Investigates a t... |
Based on the research paper, what are the key findings regarding the volcano-tectonic evolution of the Kyushu region in SW Japan over the past 15 Ma, what role did Philippine Sea Plate subduction play, and how does the paper's interpretation of the Izu arc collision timing differ from widely accepted dates? | This research paper investigates the volcano-tectonic interactions in the Kyushu region of SW Japan, focusing on the past 15 million years. The study's key findings revolve around the evolving relationship between plate tectonics and volcanic activity, particularly in response to changes in Philippine Sea plate subduct... | mahony 2011.txt
For permission to copy, contact editing@geosociety.org
© 2011 Geological Society of AmericaV olcano-tectonic interactions during rapid plate-boundary evolution in
the Kyushu region, SW Japan
S.H. Mahony1,†, L.M. Wallace2, M. Miyoshi3, P. Villamor2, R.S.J. Sparks1, and T. Hasenaka4
1Department of Earth ... |
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