Hugo van Schrojenstein Lantman
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hugolantman.bsky.social
Hugo van Schrojenstein Lantman
@hugolantman.bsky.social
800 followers 470 following 93 posts
Geology Postdoc at Utrecht University
Mechanical behaviour of minerals using nanoindentation

Fan of microstructures, petrology, metamorphism, fluids, subduction, earthquakes, stress and strain.
Occasionally takes pictures of rocks.
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hugolantman.bsky.social
Wow, 79 km, definitely deeper than I expected
December 5, 2025 at 10:59 AM
hugolantman.bsky.social
Some bonus #kyanite pictures #MinCup25
A single crystal of blue kyanite. This crystal contains kinks, visible as lines within the crystal, and are the result of deformation. Some white quartz matrix is visible in the background. Two blades of blue kyanite in a garnet-phengite-quartz rock. The phengite is visible as silvery shimmering patches, the graphite is greyish, and the few garnet are small red-brown roundish crystals mostly in the left of the specimen. A blue-white kyanite-quartz lens in an outcrop of gray graphitic schist. A camera case in the bottom of the image provides a rough scale. Close-up of a white-gray schist outcrop containing abundant garnet (orange circular crystals), a few blue kyanite crystals, and plenty of white quartz and silvery mica. The metal spike in the left of the image is the tip of a rock hammer.
October 1, 2025 at 12:01 PM
hugolantman.bsky.social
I have had relatively little to share, as of late. Hope to become more active in the future, though.
July 24, 2025 at 11:04 AM
hugolantman.bsky.social
Gorgeous! Is that a sheared coronitic granulite?
May 15, 2025 at 12:55 PM
hugolantman.bsky.social
Brilliant, congratulations!
March 12, 2025 at 8:47 AM
hugolantman.bsky.social
The Northeast of Corsica is part of the Alpine orogeny, and is similar to the "Schistes Lustres" of the Alps. There's a lot of blueschist and eclogite facies rocks there, including peridotite. Let me know if you'd like some literature.
February 13, 2025 at 8:20 AM
hugolantman.bsky.social
Same here from the Netherlands last night
February 1, 2025 at 4:33 PM
Reposted by Hugo van Schrojenstein Lantman
hugolantman.bsky.social
Also metamorphic rocks can have really cool Fe-Ti oxides! I found this cluster with intergrowths of Ti-magnetite and Mn-ilmenite (white & grey lines resp.), and rutile with non-Mn-ilmenite exsolution (grey & white lines resp.), in garnetite from Lago di Cignana.
A grayscale image taken with the backscattered electron detector of a scanning electron microscope. The image consists of various blobs of dark and bright grays with occasionally lines and dots throughout the blobs. Each brightness level corresponds to a mineral, in this case Fe-Ti-oxides and garnet. On the left-hand side is a large bright grain of Ti-magnetite with irregular lines of intermediate gray, Mn-ilmenite. On the right-hand side is a darker gray grain with white speckles and a few straight white lines, this is a grain of rutile with ilmenite inside. A zoomed-out version of the previous image; there is more dark grey (garnet) surrounding the Fe-Ti-oxides
December 19, 2024 at 8:41 AM