P-T-t-d evolution of Brattnevet Peninsula, Larsemann Hills, East Antarctica
Brattnevet Peninsula, Larsemann Hills, comprises metamorphosed acidic rocks, sedimentary rocks and basic igneous suite belonging to timespan of 920-478 Ma and have experienced three phases of deformation and metamorphism. The first and second phase of deformation gave rise to moderately plunging iso...
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ftnipr:oai:nipr.repo.nii.ac.jp:00016875 2023-05-15T13:46:39+02:00 P-T-t-d evolution of Brattnevet Peninsula, Larsemann Hills, East Antarctica 2021-12 https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=16875 http://id.nii.ac.jp/1291/00016744/ en eng https://doi.org/10.1016/j.polar.2021.100728 https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=16875 http://id.nii.ac.jp/1291/00016744/ Polar Science, 30, 100728(2021-12) 18739652 Larsemann Hills P-T-t-d path Pan-African orogeny Grenvillian orogeny East Antarctica Journal Article 2021 ftnipr https://doi.org/10.1016/j.polar.2021.100728 2023-02-18T20:11:55Z Brattnevet Peninsula, Larsemann Hills, comprises metamorphosed acidic rocks, sedimentary rocks and basic igneous suite belonging to timespan of 920-478 Ma and have experienced three phases of deformation and metamorphism. The first and second phase of deformation gave rise to moderately plunging isoclinal and open to closed folds, respectively and the third phase resulted into broad warping. M1 prograde (amphibolite) and M2 peak (granulite) and M3 retrograde (decompression) events have been inferred. In pyroxene granulite, inclusion assemblage of quartz, biotite, plagioclase and ilmenite in hornblende correspond to the relict M1 amphibolite grade event associated with D1-D2 deformation events (occurred at ~920 Ma; 538–692 °C at ~6kb). However, the presence of enstatite, diopside, quartz, biotite, ilmenite and plagioclase in pyroxene granulite and sillimanite, biotite and almandine garnet and plagioclase in metapelite indicates granulite facies during M2 event (~530 Ma; 868–920 °C at ~6.7 kb). The retrograde M3 event (500-480 Ma; ~620 °C at ~5kb) is largely depicted in pyroxene granulite and metapelite by coronal and symplectite cooling textures. The study shows a clockwise P-T path and suggests the crustal evolution of Larsemann Hills area have commenced at the wanning stages of Grenvillian Orogeny and imprinted by the Pan-African orogenic event in the terrane. Article in Journal/Newspaper Antarc* Antarctica East Antarctica Polar Science Polar Science National Institute of Polar Research Repository, Japan East Antarctica Larsemann Hills ENVELOPE(76.217,76.217,-69.400,-69.400) Polar Science 30 100728 |
institution |
Open Polar |
collection |
National Institute of Polar Research Repository, Japan |
op_collection_id |
ftnipr |
language |
English |
topic |
Larsemann Hills P-T-t-d path Pan-African orogeny Grenvillian orogeny East Antarctica |
spellingShingle |
Larsemann Hills P-T-t-d path Pan-African orogeny Grenvillian orogeny East Antarctica P-T-t-d evolution of Brattnevet Peninsula, Larsemann Hills, East Antarctica |
topic_facet |
Larsemann Hills P-T-t-d path Pan-African orogeny Grenvillian orogeny East Antarctica |
description |
Brattnevet Peninsula, Larsemann Hills, comprises metamorphosed acidic rocks, sedimentary rocks and basic igneous suite belonging to timespan of 920-478 Ma and have experienced three phases of deformation and metamorphism. The first and second phase of deformation gave rise to moderately plunging isoclinal and open to closed folds, respectively and the third phase resulted into broad warping. M1 prograde (amphibolite) and M2 peak (granulite) and M3 retrograde (decompression) events have been inferred. In pyroxene granulite, inclusion assemblage of quartz, biotite, plagioclase and ilmenite in hornblende correspond to the relict M1 amphibolite grade event associated with D1-D2 deformation events (occurred at ~920 Ma; 538–692 °C at ~6kb). However, the presence of enstatite, diopside, quartz, biotite, ilmenite and plagioclase in pyroxene granulite and sillimanite, biotite and almandine garnet and plagioclase in metapelite indicates granulite facies during M2 event (~530 Ma; 868–920 °C at ~6.7 kb). The retrograde M3 event (500-480 Ma; ~620 °C at ~5kb) is largely depicted in pyroxene granulite and metapelite by coronal and symplectite cooling textures. The study shows a clockwise P-T path and suggests the crustal evolution of Larsemann Hills area have commenced at the wanning stages of Grenvillian Orogeny and imprinted by the Pan-African orogenic event in the terrane. |
format |
Article in Journal/Newspaper |
title |
P-T-t-d evolution of Brattnevet Peninsula, Larsemann Hills, East Antarctica |
title_short |
P-T-t-d evolution of Brattnevet Peninsula, Larsemann Hills, East Antarctica |
title_full |
P-T-t-d evolution of Brattnevet Peninsula, Larsemann Hills, East Antarctica |
title_fullStr |
P-T-t-d evolution of Brattnevet Peninsula, Larsemann Hills, East Antarctica |
title_full_unstemmed |
P-T-t-d evolution of Brattnevet Peninsula, Larsemann Hills, East Antarctica |
title_sort |
p-t-t-d evolution of brattnevet peninsula, larsemann hills, east antarctica |
publishDate |
2021 |
url |
https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=16875 http://id.nii.ac.jp/1291/00016744/ |
long_lat |
ENVELOPE(76.217,76.217,-69.400,-69.400) |
geographic |
East Antarctica Larsemann Hills |
geographic_facet |
East Antarctica Larsemann Hills |
genre |
Antarc* Antarctica East Antarctica Polar Science Polar Science |
genre_facet |
Antarc* Antarctica East Antarctica Polar Science Polar Science |
op_relation |
https://doi.org/10.1016/j.polar.2021.100728 https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=16875 http://id.nii.ac.jp/1291/00016744/ Polar Science, 30, 100728(2021-12) 18739652 |
op_doi |
https://doi.org/10.1016/j.polar.2021.100728 |
container_title |
Polar Science |
container_volume |
30 |
container_start_page |
100728 |
_version_ |
1766244962874163200 |