image imagewidth (px) 200 19k | text stringlengths 9 3.52k |
|---|---|
Small phlogopite laths in highly deformed sample from Siilinjärvi apatite ore. Photomicrograph from thin section in cross and plane polarised light. | |
Amphibole fragments in mica groundmass in a thin sample from Siilinjärvi apatite ore. Photomicrograph in cross and plane polarised light. | |
Etched and stained thin section. Photomicrograph from thin section in cross and plane polarised light: the brighter mineral grains in the picture are dolomites, and the darker ones calcite grains. | |
Scanned image of thin section from Siilinjärvi apatite ore M3 in cross polarised transmitted light.
<p>The thin section can be divided into two domains: about half of the area consists of carbonate domains and rest of mica domains. The mica domains are sheared and have a nematoblastic texture. The shearing is also visi... | |
Scanned image of thin section from Siilinjärvi apatite ore in cross polarised transmitted light. The sample was collected from the Särkijärvi area, from the shear zone in the central-northern end of the pit.
<p>The thin section has a hypidiomorphic structure. Sheared zones comprise 20 area-% of the thin section. The r... | |
Scanned image of thin section from Siilinjärvi apatite ore in cross polarised transmitted light.
<p>The thin section has lepidoblastic texture and the big grains form about 75 area-% of the thin section. Sheared zones comprise the rest 25 area-% of the thin section.
</p><p>Phlogopite forms the orientation in the thin s... | |
Scanned image of thin section from Siilinjärvi apatite ore in cross polarised transmitted light.
<p>The sample is highly sheared, and the shearing in concentrated into micas. Almost the whole sample show a flow structure, the only exception is a carbonate mineral domain in the other side of the thin section.
</p><p>Com... | |
Scanned image of thin section from Siilinjärvi apatite ore in cross polarised transmitted light.
<p>The thin section presents apatite-rich carbonate ore. The grain size is quite big and the thin section consist mostly of big apatite grains in granular carbonate mass. The sample is not oriented. The grains are mostly an... | |
Scanned image of thin section from Siilinjärvi apatite ore in cross polarised transmitted light.
<p>The thin section has a well-developed foliation and plenty of apatite. The thin section is highly sheared, and the mineral grains have shattered to small fragments. Shearing has concentrated to the mica-rich zones.
</p><... | |
Scanned image of thin section R625 110.80-110.95 in cross polarised transmitted light, Siilinjärvi apatite ore.
<p>The thin section is carbonate rich and consists mainly of granular carbonate aggregate with some mica and apatite porphyroclasts.
</p><p>Carbonates cover 75 % of the thin section and form the groundmass of... | |
Scanned image of thin section from Siilinjärvi apatite ore in cross polarised transmitted light.
<p>The thin section has a clear orientation and the movement has concentrated to planes between the bigger grains. Clasts form half of the thin section, and the rest is composed of oriented groundmass.
</p><p>Tetraferriphlo... | |
Scanned image of thin section from Siilinjärvi apatite ore in cross polarised transmitted light. The thin section is thinner in the right hand side, and that is the reason for different interference colours there.
<p>The thin section consists of apatite grains in mica groundmass. The thin section is highly sheared and ... | |
Scanned image of thin section from Siilinjärvi apatite ore. Crossed polarizers.
<p>The rock is oriented and porphyroclastic. The micas and amphiboles are clearly oriented, and the carbonates have grown into vein-like structures.
</p><p>Tetraferriphlogopite is present as small laths and porphyroclasts of large flakes. L... | |
Scanned image of thin section from <a href="https://en.wikipedia.org/wiki/Siilinj%C3%A4rvi_carbonatite" class="extiw" title="en:Siilinjärvi carbonatite">Siilinjärvi apatite ore</a> in cross polarised transmitted light. Actual sector size about 37 × 20 mm.
<p>The thin section is only slightly oriented and shearing has b... | |
Scanned image of thin section from Siilinjärvi apatite ore in cross polarised transmitted light. Actual sector size about 37 × 20 mm.
<p>The thin section is only slightly oriented and shearing has barely effected to the rock. The grain size is quite large and carbonate content is high.
</p><p>Tetraferriphlogopite is th... | |
Scanned image of thin section from Siilinjärvi apatite ore in cross polarised transmitted light.
<p>The thin section has a very low amount of small mica chips. The bigger mica flakes in the sample are oriented, but shearing has not affected the grain size nor formed any foliation. Magnetite is found as accessory minera... | |
Scanned image of thin section from Siilinjärvi apatite ore in cross polarised transmitted light.
<p>In the thin section apatite is mostly found as big inclusions in carbonate aggregates. The thin section has also a couple of narrow carbonate veins and a clear flow structure.
</p><p>Tetraferriphlogopite forms 70 area-% ... | |
Scanned image of thin section from Siilinjärvi apatite ore in cross polarised transmitted light.
<p>The thin section is very mica rich and lightly sheared. Shearing has shattered the mica flakes into pieces but there are spots without any broken pieces, only big mica grains.
</p><p>Tetraferriphlogopite forms 82 area-% ... | |
Scanned image of thin section from Siilinjärvi apatite ore in cross polarised transmitted light.
<p>The thin section is highly sheared and has a fine grain size. Mineral crystals have broken into small fragments, and almost only remaining structures are carbonate aggregates.
Tetraferriphlogopite covers half of the thin... | |
Thin sections of limestone rocks (one is a coral boundstone) under an optical microscope | |
"C. G. S." (José Ramírez del Pozo y M. Aguilar) thin sections collection. Geological and Mining Institute of Spain: Drill Core Repository. Peñarroya, Córdoba, Spain. | |
Plate 5 of <b>The Early Cambrian Fossil <i>Salterella conulata</i> Clark in Eastern North America</b>
<p>By Ellis L. Yochelson
Contributions to Paleontology, Geological Survey <a rel="nofollow" class="external text" href="https://pubs.er.usgs.gov/publication/pp683B">Professional Paper 683-B</a>, 1970
Plate 5 caption:
<... | |
titanite, thin section with crossed polarizers, 13,5 X magnified | |
Tonalite. nicol paralleli | |
Topas im Dünnschliff im linear-polarisierten Licht in einem Topasgreisen (Erzgebirge) | |
Topas im Dünnschliff unter gekreuzten Polarisatoren in einem Topasgreisen (Erzgebirge) | |
Image of an ultra thin section of a carbonate rock . Interference colors are not consistent with those of a normal thin section. | |
Picture of a ultra thin section of a carbonate rock. Interference colors are different to a normal rock thin section. | |
Original figure caption: <i>Thin sections. (A) Grimberg. (B, C) Erwitte. (D-F) Liencres. (A-C) Wackestones contain clay and silt, with relatively low content of bioclasts. (D-F) Silty packstones with abundant bioclasts and siliciclasts.</i> | |
Photomicrograph of platy crystals in a metamorphic rock. | |
Thin section of interior hornfels of contact aureole showing garnet, cordierite, orthopyroxene in cross polarized light. Presence of orthopyroxene indicates high-grade contact metamorphism. | |
Yoderite (Blue) on Kyanite. Mautia Hill (Tanzania). Yoderite is a very rare mineral and Mautia Hill is the type locality for this mineral. Plane polarized light image, magnification 2x (Field of view = 7mm) |
Subsets and Splits
No community queries yet
The top public SQL queries from the community will appear here once available.