Calc-silicate rocks and marbles from Lutzow-Holm Complex,East Antarctica, with special reference to the mineralogy and geochemical characteristics of calc-silicate mega-boudins from Rundvagshetta
We report here the mode of occurrence of calc-silicate rocks and marbles from the Lutzow-Holm Complex, East Antarctica, and a worked example from Rundvagshetta. Calc-silicate boudins were observed in Cape Hinode, Akarui Point, Byobu Rock, Skarvsnes, Skallevikshalsen and Rundvagshetta, whereas they w...
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Institute of Geosciences, Shizuoka University/National Institute of Polar Research/National Institute of Polar Research/Department of Earth Sciences, Chiba University/Department of Earth and Environmental Sciences, Faculty of Science, Yamagata University
2006
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ftnipr:oai:nipr.repo.nii.ac.jp:00003163 2023-05-15T13:49:00+02:00 Calc-silicate rocks and marbles from Lutzow-Holm Complex,East Antarctica, with special reference to the mineralogy and geochemical characteristics of calc-silicate mega-boudins from Rundvagshetta M. Satish-Kumar Yoichi Motoyoshi Yoshimitsu Suda Yoshikuni Hiroi Shin-ichi Kagashima 2006-10 https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=3163 http://id.nii.ac.jp/1291/00003163/ https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=3163&item_no=1&attribute_id=18&file_no=1 en eng Institute of Geosciences, Shizuoka University/National Institute of Polar Research/National Institute of Polar Research/Department of Earth Sciences, Chiba University/Department of Earth and Environmental Sciences, Faculty of Science, Yamagata University National Institute of Polar Research https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=3163 http://id.nii.ac.jp/1291/00003163/ AA1130866X Polar geoscience, 19, 37-61(2006-10) https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=3163&item_no=1&attribute_id=18&file_no=1 calc-silicate boudins Lutzow-Holm Complex fluid-rock interaction P-T-fluid history garnet corona textures Departmental Bulletin Paper P(論文) 2006 ftnipr 2022-12-03T19:43:04Z We report here the mode of occurrence of calc-silicate rocks and marbles from the Lutzow-Holm Complex, East Antarctica, and a worked example from Rundvagshetta. Calc-silicate boudins were observed in Cape Hinode, Akarui Point, Byobu Rock, Skarvsnes, Skallevikshalsen and Rundvagshetta, whereas they were reported earlier from Sinnan Rock, Cape Ryugu, Akebono Rock, Cape Hinode, Niban Rock, Kasumi Rock, Daruma Rock, Cape Omega, Langhovde, Ytrehovdeholmen and Skarvsnes. They vary in size from decimeters to few meters and are commonly enclosed within pelitic or psammitic gneisses. In addition, extensive layers of marbles and calc-silicate rocks are distributed in Skallevikshalsen. The calc-silicate mega-boudins within the layered pyroxene-gneiss from Rundvagshetta, up to 5m long and 2m thick, comprises of coarse to medium grained assemblage of scapolite+anorthite+garnet+clinopyroxene+calcite+quartz+titanite±wollastonite. Co-existing scapolite and plagioclase suggest a "minimum" estimate of peak metamorphic temperature of ~830°C . Peak metamorphic mineral assemblages equilibrated at moderate to high X_(CO2) conditions (0.3-0.7) and temperatures between 850 and 1000°C , consistent with the ultrahigh temperature metamorphic conditions reported in the region. Multistage garnet corona formation preserved in the calc-silicate assemblage suggests a local increase in hydrous fluid activity during retrogression. Preliminary bulk rock geochemistry of different mineralogical zones in the boudin shows chemical potential gradients in some major elements, especially SiO_2, Al_2O_3 and CaO, possibly controlled by the compositional variations in the protolith. Altogether, these results suggest that calc-silicate rocks preserve information on the metamorphic evolution and help us in deducing the geodynamic evolution of high-grade terrains. Report Antarc* Antarctica East Antarctica Polar geoscience National Institute of Polar Research Repository, Japan East Antarctica Langhovde ENVELOPE(39.733,39.733,-69.217,-69.217) Skarvsnes ENVELOPE(39.667,39.667,-69.467,-69.467) Ryugu ENVELOPE(44.033,44.033,-67.967,-67.967) Cape Hinode ENVELOPE(42.633,42.633,-68.117,-68.117) Rundvagshetta ENVELOPE(39.000,39.000,-69.883,-69.883) Cape Ryugu ENVELOPE(44.033,44.033,-67.967,-67.967) Kasumi Rock ENVELOPE(42.250,42.250,-68.383,-68.383) Skallevikshalsen ENVELOPE(39.333,39.333,-69.692,-69.692) Cape Omega ENVELOPE(41.000,41.000,-68.633,-68.633) Akebono Rock ENVELOPE(42.950,42.950,-68.083,-68.083) Byobu Rock ENVELOPE(42.050,42.050,-68.383,-68.383) Niban Rock ENVELOPE(42.467,42.467,-68.233,-68.233) Daruma Rock ENVELOPE(41.217,41.217,-68.550,-68.550) Ytrehovdeholmen ENVELOPE(39.417,39.417,-69.250,-69.250) |
institution |
Open Polar |
collection |
National Institute of Polar Research Repository, Japan |
op_collection_id |
ftnipr |
language |
English |
topic |
calc-silicate boudins Lutzow-Holm Complex fluid-rock interaction P-T-fluid history garnet corona textures |
spellingShingle |
calc-silicate boudins Lutzow-Holm Complex fluid-rock interaction P-T-fluid history garnet corona textures M. Satish-Kumar Yoichi Motoyoshi Yoshimitsu Suda Yoshikuni Hiroi Shin-ichi Kagashima Calc-silicate rocks and marbles from Lutzow-Holm Complex,East Antarctica, with special reference to the mineralogy and geochemical characteristics of calc-silicate mega-boudins from Rundvagshetta |
topic_facet |
calc-silicate boudins Lutzow-Holm Complex fluid-rock interaction P-T-fluid history garnet corona textures |
description |
We report here the mode of occurrence of calc-silicate rocks and marbles from the Lutzow-Holm Complex, East Antarctica, and a worked example from Rundvagshetta. Calc-silicate boudins were observed in Cape Hinode, Akarui Point, Byobu Rock, Skarvsnes, Skallevikshalsen and Rundvagshetta, whereas they were reported earlier from Sinnan Rock, Cape Ryugu, Akebono Rock, Cape Hinode, Niban Rock, Kasumi Rock, Daruma Rock, Cape Omega, Langhovde, Ytrehovdeholmen and Skarvsnes. They vary in size from decimeters to few meters and are commonly enclosed within pelitic or psammitic gneisses. In addition, extensive layers of marbles and calc-silicate rocks are distributed in Skallevikshalsen. The calc-silicate mega-boudins within the layered pyroxene-gneiss from Rundvagshetta, up to 5m long and 2m thick, comprises of coarse to medium grained assemblage of scapolite+anorthite+garnet+clinopyroxene+calcite+quartz+titanite±wollastonite. Co-existing scapolite and plagioclase suggest a "minimum" estimate of peak metamorphic temperature of ~830°C . Peak metamorphic mineral assemblages equilibrated at moderate to high X_(CO2) conditions (0.3-0.7) and temperatures between 850 and 1000°C , consistent with the ultrahigh temperature metamorphic conditions reported in the region. Multistage garnet corona formation preserved in the calc-silicate assemblage suggests a local increase in hydrous fluid activity during retrogression. Preliminary bulk rock geochemistry of different mineralogical zones in the boudin shows chemical potential gradients in some major elements, especially SiO_2, Al_2O_3 and CaO, possibly controlled by the compositional variations in the protolith. Altogether, these results suggest that calc-silicate rocks preserve information on the metamorphic evolution and help us in deducing the geodynamic evolution of high-grade terrains. |
format |
Report |
author |
M. Satish-Kumar Yoichi Motoyoshi Yoshimitsu Suda Yoshikuni Hiroi Shin-ichi Kagashima |
author_facet |
M. Satish-Kumar Yoichi Motoyoshi Yoshimitsu Suda Yoshikuni Hiroi Shin-ichi Kagashima |
author_sort |
M. Satish-Kumar |
title |
Calc-silicate rocks and marbles from Lutzow-Holm Complex,East Antarctica, with special reference to the mineralogy and geochemical characteristics of calc-silicate mega-boudins from Rundvagshetta |
title_short |
Calc-silicate rocks and marbles from Lutzow-Holm Complex,East Antarctica, with special reference to the mineralogy and geochemical characteristics of calc-silicate mega-boudins from Rundvagshetta |
title_full |
Calc-silicate rocks and marbles from Lutzow-Holm Complex,East Antarctica, with special reference to the mineralogy and geochemical characteristics of calc-silicate mega-boudins from Rundvagshetta |
title_fullStr |
Calc-silicate rocks and marbles from Lutzow-Holm Complex,East Antarctica, with special reference to the mineralogy and geochemical characteristics of calc-silicate mega-boudins from Rundvagshetta |
title_full_unstemmed |
Calc-silicate rocks and marbles from Lutzow-Holm Complex,East Antarctica, with special reference to the mineralogy and geochemical characteristics of calc-silicate mega-boudins from Rundvagshetta |
title_sort |
calc-silicate rocks and marbles from lutzow-holm complex,east antarctica, with special reference to the mineralogy and geochemical characteristics of calc-silicate mega-boudins from rundvagshetta |
publisher |
Institute of Geosciences, Shizuoka University/National Institute of Polar Research/National Institute of Polar Research/Department of Earth Sciences, Chiba University/Department of Earth and Environmental Sciences, Faculty of Science, Yamagata University |
publishDate |
2006 |
url |
https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=3163 http://id.nii.ac.jp/1291/00003163/ https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=3163&item_no=1&attribute_id=18&file_no=1 |
long_lat |
ENVELOPE(39.733,39.733,-69.217,-69.217) ENVELOPE(39.667,39.667,-69.467,-69.467) ENVELOPE(44.033,44.033,-67.967,-67.967) ENVELOPE(42.633,42.633,-68.117,-68.117) ENVELOPE(39.000,39.000,-69.883,-69.883) ENVELOPE(44.033,44.033,-67.967,-67.967) ENVELOPE(42.250,42.250,-68.383,-68.383) ENVELOPE(39.333,39.333,-69.692,-69.692) ENVELOPE(41.000,41.000,-68.633,-68.633) ENVELOPE(42.950,42.950,-68.083,-68.083) ENVELOPE(42.050,42.050,-68.383,-68.383) ENVELOPE(42.467,42.467,-68.233,-68.233) ENVELOPE(41.217,41.217,-68.550,-68.550) ENVELOPE(39.417,39.417,-69.250,-69.250) |
geographic |
East Antarctica Langhovde Skarvsnes Ryugu Cape Hinode Rundvagshetta Cape Ryugu Kasumi Rock Skallevikshalsen Cape Omega Akebono Rock Byobu Rock Niban Rock Daruma Rock Ytrehovdeholmen |
geographic_facet |
East Antarctica Langhovde Skarvsnes Ryugu Cape Hinode Rundvagshetta Cape Ryugu Kasumi Rock Skallevikshalsen Cape Omega Akebono Rock Byobu Rock Niban Rock Daruma Rock Ytrehovdeholmen |
genre |
Antarc* Antarctica East Antarctica Polar geoscience |
genre_facet |
Antarc* Antarctica East Antarctica Polar geoscience |
op_relation |
https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=3163 http://id.nii.ac.jp/1291/00003163/ AA1130866X Polar geoscience, 19, 37-61(2006-10) https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=3163&item_no=1&attribute_id=18&file_no=1 |
_version_ |
1766250368751108096 |