#mincup25 — Public Fediverse posts
Live and recent posts from across the Fediverse tagged #mincup25, aggregated by home.social.
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Repost: Kyanite isn't just a fetching blue mineral that documents the experience of sediments under extreme duress.
It's an ore: Virginia alone mined 83,000 tonnes in 2023. Kyanite in furnace insulation transforms to mullite when heated, expanding to reduce porosity and shrinkage.Virginia Kyanite (photo: J. Wyman) from:
https://energy.virginia.gov/geology/Kyanite.shtml -
Over two billion tonnes of iron ore have been mined from the Labrador Trough of Quebec and Labrador over the last 70 years. The paleo-Proterozoic sediments have been variably metamorphosed (you can see the bend in the southern part of the belt caused by the younger Grenville orogeny). Much of the direct shipping ore is dominated by the mineral #Hematite.
The steel of your lunchtime knife and fork may have come from the Trough!
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Yay! Dioptase won! I was worried because this whole series is a battle where weird minerals win for reasons that are just odd. Anyone remember the contest for #Paddlewheel or some such weird name? I’ll be in time for the next contest so I can study up a bit before voting. #MinCup25 #Dioptase
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This is one of the dykes found near Ayer's Cliff, just SE of Magog, Quebec. It's a set of three dykes, one of which has the deep-derived xenoliths. That one dyke (not photogenic) has weathered much faster, perhaps due to a higher carbonate content.
#kyanite #MinCup25 #Quebec #Xenolith #Grenville #Appalachians -
This is one of the dykes found near Ayer's Cliff, just SE of Magog, Quebec. It's a set of three dykes, one of which has the deep-derived xenoliths. That one dyke (not photogenic) has weathered much faster, perhaps due to a higher carbonate content.
#kyanite #MinCup25 #Quebec #Xenolith #Grenville #Appalachians -
This is one of the dykes found near Ayer's Cliff, just SE of Magog, Quebec. It's a set of three dykes, one of which has the deep-derived xenoliths. That one dyke (not photogenic) has weathered much faster, perhaps due to a higher carbonate content.
#kyanite #MinCup25 #Quebec #Xenolith #Grenville #Appalachians -
This is one of the dykes found near Ayer's Cliff, just SE of Magog, Quebec. It's a set of three dykes, one of which has the deep-derived xenoliths. That one dyke (not photogenic) has weathered much faster, perhaps due to a higher carbonate content.
#kyanite #MinCup25 #Quebec #Xenolith #Grenville #Appalachians -
This is one of the dykes found near Ayer's Cliff, just SE of Magog, Quebec. It's a set of three dykes, one of which has the deep-derived xenoliths. That one dyke (not photogenic) has weathered much faster, perhaps due to a higher carbonate content.
#kyanite #MinCup25 #Quebec #Xenolith #Grenville #Appalachians -
A photo of a Cretaceous dyke intruding into Appalachian-deformed sedimentary rocks deposited in the lower Paleozoic: Earth history from 110 to almost 500 million years ago.
But #kyanite records more of the story: it's part of xenoliths brought to the surface by these dykes that document Grenville crust (1.1 billion years old) at depth.
See: Trzcienski: Kyanite-garnet-bearing Cambrian rocks and Grenville granulites from the Ayer's Cliff, Quebec... Geology (1989)
#MinCup25 #Quebec #Appalachians -
One vote can literally make the difference. Vote now! #hematite #SoClose #OnlyMinutesLeft #MinCup25 ⚒️ sci-fi 🧪 🖖🏼 scifi Geosciences #WomenInSTEM geology 🔭🪐
RE: https://bsky.app/profile/did:plc:r6drdfmf5fzdtvuacnfmfiga/post/3lzmp6mzd6227 -
Massive #hematite later brecciated by quartz veining, From the Soudan ironstone, Ely greenstone belt, Vermilion district of northern Minnesota.
These ironstones are sandwiched between pillow basalts of approximately 2.7 billion years old.
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Thortveitite is the main ore of scandium.
Titanite is prized for its beauty, comes in different colours & is a source of titanium and hence titanium dioxide, used as a white pigment since ~1910. So, it gets my art vote.
Gets physics vote for trichroism- transparent specimens can show 3 colours depending on viewing angle. #MinCup25 #scicomm #artHist #pigment
Vote for titanite here: https://www.mineralcup.org/2025/vote/r1m11
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Both wavellite and dioptase are sometimes made into jewelry but (though a rare pigment) dioptase has been on artwork used since Neolithic times so it wins my art vote!
See for instance Neolithic sculpture from Jordan, some ancients Asian murals & Russian religious icons.
#MinCup25Vote for dioptase here: https://www.mineralcup.org/2025/vote/r1m10
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Quite a bit of #Chrysotile was extracted from the Jeffrey Mine, Quebec. It is located on a line of oceanic lithosphere attached to North America during the growth of the Appalachians.
The town of Asbestos, home of the mine, has been renamed 'Val-des-Sources'.
Much of the expense of renovating buildings in Quebec is the cost of removing the asbestos insulation.