Pristine microstructures in pseudotachylytes formed in dry lower crust, Lofoten, Norway
Feldspar-rich pseudotachylytes from the island of Moskenesøya, Lofoten, formed in dry granulites under lower crustal conditions during the Caledonian orogeny. The central parts of the pseudotachylytes, where the cooling rates were slowest, are characterized by microlites and spherulites of plagiocla...
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ftoslouniv:oai:www.duo.uio.no:10852/90095 2023-05-15T17:08:14+02:00 Pristine microstructures in pseudotachylytes formed in dry lower crust, Lofoten, Norway Dunkel, Kristina G Morales, Luiz F.G. Jamtveit, Bjørn 2021-04-14T15:26:17Z http://hdl.handle.net/10852/90095 http://urn.nb.no/URN:NBN:no-92715 https://doi.org/10.1098/rsta.2019.0423 EN eng Royal Society Publishing http://urn.nb.no/URN:NBN:no-92715 Dunkel, Kristina G Morales, Luiz F.G. Jamtveit, Bjørn . Pristine microstructures in pseudotachylytes formed in dry lower crust, Lofoten, Norway. Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences. 2021, 379(2193), 1-16 http://hdl.handle.net/10852/90095 1904074 info:ofi/fmt:kev:mtx:ctx&ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences&rft.volume=379&rft.spage=1&rft.date=2021 Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 379 2193 https://doi.org/10.1098/rsta.2019.0423 URN:NBN:no-92715 Fulltext https://www.duo.uio.no/bitstream/handle/10852/90095/1/Dunkel%2Bet%2Bal%2B2021%2BLofoten%2Bpristine%2Bmicrostructures.pdf Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/ CC-BY 1364-503X Journal article Tidsskriftartikkel Peer reviewed PublishedVersion 2021 ftoslouniv https://doi.org/10.1098/rsta.2019.0423 2022-01-26T23:33:57Z Feldspar-rich pseudotachylytes from the island of Moskenesøya, Lofoten, formed in dry granulites under lower crustal conditions during the Caledonian orogeny. The central parts of the pseudotachylytes, where the cooling rates were slowest, are characterized by microlites and spherulites of plagioclase and K-feldspar. K-feldspar surrounding plagioclase is consistent with crystallization from a melt during cooling instead of devitrification as the origin of the spherulites. Very thin (a few micrometres wide) injection veins, which experienced very rapid quenching, contain amorphous or cryptocrystalline material. The preservation of this material and of the fine-grained microstructures shows that, under fluid-absent conditions, recrystallization and reactions are slow and the original microstructures of the pseudotachylytes can be preserved. This article is part of a discussion meeting issue ‘Understanding earthquakes using the geological record’. Article in Journal/Newspaper Lofoten Moskenesøya Universitet i Oslo: Digitale utgivelser ved UiO (DUO) Lofoten Moskenesøya ENVELOPE(13.000,13.000,67.983,67.983) Norway Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 379 2193 20190423 |
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Open Polar |
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Universitet i Oslo: Digitale utgivelser ved UiO (DUO) |
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ftoslouniv |
language |
English |
description |
Feldspar-rich pseudotachylytes from the island of Moskenesøya, Lofoten, formed in dry granulites under lower crustal conditions during the Caledonian orogeny. The central parts of the pseudotachylytes, where the cooling rates were slowest, are characterized by microlites and spherulites of plagioclase and K-feldspar. K-feldspar surrounding plagioclase is consistent with crystallization from a melt during cooling instead of devitrification as the origin of the spherulites. Very thin (a few micrometres wide) injection veins, which experienced very rapid quenching, contain amorphous or cryptocrystalline material. The preservation of this material and of the fine-grained microstructures shows that, under fluid-absent conditions, recrystallization and reactions are slow and the original microstructures of the pseudotachylytes can be preserved. This article is part of a discussion meeting issue ‘Understanding earthquakes using the geological record’. |
format |
Article in Journal/Newspaper |
author |
Dunkel, Kristina G Morales, Luiz F.G. Jamtveit, Bjørn |
spellingShingle |
Dunkel, Kristina G Morales, Luiz F.G. Jamtveit, Bjørn Pristine microstructures in pseudotachylytes formed in dry lower crust, Lofoten, Norway |
author_facet |
Dunkel, Kristina G Morales, Luiz F.G. Jamtveit, Bjørn |
author_sort |
Dunkel, Kristina G |
title |
Pristine microstructures in pseudotachylytes formed in dry lower crust, Lofoten, Norway |
title_short |
Pristine microstructures in pseudotachylytes formed in dry lower crust, Lofoten, Norway |
title_full |
Pristine microstructures in pseudotachylytes formed in dry lower crust, Lofoten, Norway |
title_fullStr |
Pristine microstructures in pseudotachylytes formed in dry lower crust, Lofoten, Norway |
title_full_unstemmed |
Pristine microstructures in pseudotachylytes formed in dry lower crust, Lofoten, Norway |
title_sort |
pristine microstructures in pseudotachylytes formed in dry lower crust, lofoten, norway |
publisher |
Royal Society Publishing |
publishDate |
2021 |
url |
http://hdl.handle.net/10852/90095 http://urn.nb.no/URN:NBN:no-92715 https://doi.org/10.1098/rsta.2019.0423 |
long_lat |
ENVELOPE(13.000,13.000,67.983,67.983) |
geographic |
Lofoten Moskenesøya Norway |
geographic_facet |
Lofoten Moskenesøya Norway |
genre |
Lofoten Moskenesøya |
genre_facet |
Lofoten Moskenesøya |
op_source |
1364-503X |
op_relation |
http://urn.nb.no/URN:NBN:no-92715 Dunkel, Kristina G Morales, Luiz F.G. Jamtveit, Bjørn . Pristine microstructures in pseudotachylytes formed in dry lower crust, Lofoten, Norway. Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences. 2021, 379(2193), 1-16 http://hdl.handle.net/10852/90095 1904074 info:ofi/fmt:kev:mtx:ctx&ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences&rft.volume=379&rft.spage=1&rft.date=2021 Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 379 2193 https://doi.org/10.1098/rsta.2019.0423 URN:NBN:no-92715 Fulltext https://www.duo.uio.no/bitstream/handle/10852/90095/1/Dunkel%2Bet%2Bal%2B2021%2BLofoten%2Bpristine%2Bmicrostructures.pdf |
op_rights |
Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/ |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1098/rsta.2019.0423 |
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Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences |
container_volume |
379 |
container_issue |
2193 |
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20190423 |
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1766063931702378496 |