Petrological note on some metamorphic rocks from Skallen, East Antarctica (abstract)
P(論文) A preliminary petrography of a paragneiss and two metabasites from the Skallen area of the Lutzow-Holm Bay region is given. The paragneiss has the stable association of garnet ((Gr)_<2.2-3.3>(Alm)_<60.9-62.2>(Pyr)_<34.0-36.2>(Spes)_<0.7-0.8>)+sillimanite+K feldspar+plag...
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ftnipr:oai:nipr.repo.nii.ac.jp:00001480 2024-09-09T19:10:24+00:00 Petrological note on some metamorphic rocks from Skallen, East Antarctica (abstract) Suzuki, Morihisa Yoshida, Masaru 1983-10 application/pdf https://nipr.repo.nii.ac.jp/record/1480/files/KJ00000012113.pdf eng eng Memoirs of National Institute of Polar Research. Special issue 28 217 AA00733561 https://nipr.repo.nii.ac.jp/record/1480/files/KJ00000012113.pdf 1983 ftnipr 2024-06-17T04:00:39Z P(論文) A preliminary petrography of a paragneiss and two metabasites from the Skallen area of the Lutzow-Holm Bay region is given. The paragneiss has the stable association of garnet ((Gr)_<2.2-3.3>(Alm)_<60.9-62.2>(Pyr)_<34.0-36.2>(Spes)_<0.7-0.8>)+sillimanite+K feldspar+plagioclase (X_<ca>=0.23)+quartz±biotite+rutile+ilmenite, and metabasites, orthopyroxene (X_<Fe>=0.56 to 0.59)+clinopyroxene (X_<Fe>=0.44 to 0.45)+garnet ((Gr)_<18.8-26.7>(Alm)_<56.6-63.4>(Pyr)_<11.7-14.3>(Spes)_<2.9-4.4>)+plagioclase (X_<ca>=0.65 to 0.87)+quartz±hornblende+ilmenite and magnetite. Based on the calculations following some geothermometers (garnet-biotite, THOMPSON : Am. J. Sci., 276,425,1976 and orthopyroxene-clinopyroxene, WOOD and BANNO : Contrib. Mineral. Petrol., 42,109,1973,subtracting 50℃) and geobarometers (garnet-sillimanite-plagioclase, GHENT : Am. Mineral., 61,710,1976 and garnet-orthopyroxene-plagioclase, WELLS : J. Petrol., 20,187,1979), the metamorphic conditions have been inferred to be graded up to 725±25℃ and 6.3±1.3kb. These temperature and pressure values are considered to represent the conditions of some stage during the dominant granulite facies metamorphism in the area, although microstructures of rocks may suggest that some superposed metamorphic events took place in the area. Further detailed explanations, especially on microstructures of rocks and their correlation with the mineral chemistry, are left for future studies. departmental bulletin paper Other/Unknown Material Antarc* Antarctica East Antarctica Memoirs of National Institute of Polar Research Polar Research National Institute of Polar Research Repository, Japan East Antarctica Skallen ENVELOPE(39.467,39.467,-69.650,-69.650) |
institution |
Open Polar |
collection |
National Institute of Polar Research Repository, Japan |
op_collection_id |
ftnipr |
language |
English |
description |
P(論文) A preliminary petrography of a paragneiss and two metabasites from the Skallen area of the Lutzow-Holm Bay region is given. The paragneiss has the stable association of garnet ((Gr)_<2.2-3.3>(Alm)_<60.9-62.2>(Pyr)_<34.0-36.2>(Spes)_<0.7-0.8>)+sillimanite+K feldspar+plagioclase (X_<ca>=0.23)+quartz±biotite+rutile+ilmenite, and metabasites, orthopyroxene (X_<Fe>=0.56 to 0.59)+clinopyroxene (X_<Fe>=0.44 to 0.45)+garnet ((Gr)_<18.8-26.7>(Alm)_<56.6-63.4>(Pyr)_<11.7-14.3>(Spes)_<2.9-4.4>)+plagioclase (X_<ca>=0.65 to 0.87)+quartz±hornblende+ilmenite and magnetite. Based on the calculations following some geothermometers (garnet-biotite, THOMPSON : Am. J. Sci., 276,425,1976 and orthopyroxene-clinopyroxene, WOOD and BANNO : Contrib. Mineral. Petrol., 42,109,1973,subtracting 50℃) and geobarometers (garnet-sillimanite-plagioclase, GHENT : Am. Mineral., 61,710,1976 and garnet-orthopyroxene-plagioclase, WELLS : J. Petrol., 20,187,1979), the metamorphic conditions have been inferred to be graded up to 725±25℃ and 6.3±1.3kb. These temperature and pressure values are considered to represent the conditions of some stage during the dominant granulite facies metamorphism in the area, although microstructures of rocks may suggest that some superposed metamorphic events took place in the area. Further detailed explanations, especially on microstructures of rocks and their correlation with the mineral chemistry, are left for future studies. departmental bulletin paper |
author |
Suzuki, Morihisa Yoshida, Masaru |
spellingShingle |
Suzuki, Morihisa Yoshida, Masaru Petrological note on some metamorphic rocks from Skallen, East Antarctica (abstract) |
author_facet |
Suzuki, Morihisa Yoshida, Masaru |
author_sort |
Suzuki, Morihisa |
title |
Petrological note on some metamorphic rocks from Skallen, East Antarctica (abstract) |
title_short |
Petrological note on some metamorphic rocks from Skallen, East Antarctica (abstract) |
title_full |
Petrological note on some metamorphic rocks from Skallen, East Antarctica (abstract) |
title_fullStr |
Petrological note on some metamorphic rocks from Skallen, East Antarctica (abstract) |
title_full_unstemmed |
Petrological note on some metamorphic rocks from Skallen, East Antarctica (abstract) |
title_sort |
petrological note on some metamorphic rocks from skallen, east antarctica (abstract) |
publishDate |
1983 |
url |
https://nipr.repo.nii.ac.jp/record/1480/files/KJ00000012113.pdf |
long_lat |
ENVELOPE(39.467,39.467,-69.650,-69.650) |
geographic |
East Antarctica Skallen |
geographic_facet |
East Antarctica Skallen |
genre |
Antarc* Antarctica East Antarctica Memoirs of National Institute of Polar Research Polar Research |
genre_facet |
Antarc* Antarctica East Antarctica Memoirs of National Institute of Polar Research Polar Research |
op_relation |
Memoirs of National Institute of Polar Research. Special issue 28 217 AA00733561 https://nipr.repo.nii.ac.jp/record/1480/files/KJ00000012113.pdf |
_version_ |
1809825431500619776 |