A new metal-rich mesosiderite from Antarctica, RKPA79015
A 10.0kg iron-rich meteorite (RKPA79015) and four silicate-rich fragments (RKPA80229,80246,80258,and 80263) are individuals from a new Antarctic mesosiderite. The silicate minerals present are orthopyroxene of uniform composition ((Wo)_2(En)_<74>(Fs)_<24>) and calcium-rich plagioclase of...
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Department of Mineral Sciences, Smithsonian Institution
1982
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ftnipr:oai:nipr.repo.nii.ac.jp:00001380 2023-05-15T13:47:59+02:00 A new metal-rich mesosiderite from Antarctica, RKPA79015 Roy S. Jr. Clarke Brian Mason 1982-12 https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=1380 http://id.nii.ac.jp/1291/00001380/ https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=1380&item_no=1&attribute_id=18&file_no=1 en eng Department of Mineral Sciences, Smithsonian Institution https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=1380 http://id.nii.ac.jp/1291/00001380/ AA00733561 Memoirs of National Institute of Polar Research. Special issue, 25, 78-85(1982-12) https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=1380&item_no=1&attribute_id=18&file_no=1 Departmental Bulletin Paper P(論文) 1982 ftnipr 2022-11-12T19:42:11Z A 10.0kg iron-rich meteorite (RKPA79015) and four silicate-rich fragments (RKPA80229,80246,80258,and 80263) are individuals from a new Antarctic mesosiderite. The silicate minerals present are orthopyroxene of uniform composition ((Wo)_2(En)_<74>(Fs)_<24>) and calcium-rich plagioclase of somewhat variable composition ((An)_<86>-(An)_<94>). Pigeonite and olivine have been looked for and not found. Chromite containing (Al)_2O_3 7.0%, MgO 1.8%, MnO 1.6%, and TiO_2 0.5% is present, as is merrillite. Analysis of the metallic component gave 9.87% Ni, 0.52% Co, 0.15% P, and 2.14% FeS. Metallic areas consist of polycrystalline kamacite with grain boundaries containing cloudy taenite and schreibersite. Cloudy taenite areas have thick borders of tetrataenite. These metallographic associations indicate a low-temperature cooling history identical to that of well known mesosiderites. Report Antarc* Antarctic Antarctica Memoirs of National Institute of Polar Research Polar Research National Institute of Polar Research Repository, Japan Antarctic |
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Open Polar |
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National Institute of Polar Research Repository, Japan |
op_collection_id |
ftnipr |
language |
English |
description |
A 10.0kg iron-rich meteorite (RKPA79015) and four silicate-rich fragments (RKPA80229,80246,80258,and 80263) are individuals from a new Antarctic mesosiderite. The silicate minerals present are orthopyroxene of uniform composition ((Wo)_2(En)_<74>(Fs)_<24>) and calcium-rich plagioclase of somewhat variable composition ((An)_<86>-(An)_<94>). Pigeonite and olivine have been looked for and not found. Chromite containing (Al)_2O_3 7.0%, MgO 1.8%, MnO 1.6%, and TiO_2 0.5% is present, as is merrillite. Analysis of the metallic component gave 9.87% Ni, 0.52% Co, 0.15% P, and 2.14% FeS. Metallic areas consist of polycrystalline kamacite with grain boundaries containing cloudy taenite and schreibersite. Cloudy taenite areas have thick borders of tetrataenite. These metallographic associations indicate a low-temperature cooling history identical to that of well known mesosiderites. |
format |
Report |
author |
Roy S. Jr. Clarke Brian Mason |
spellingShingle |
Roy S. Jr. Clarke Brian Mason A new metal-rich mesosiderite from Antarctica, RKPA79015 |
author_facet |
Roy S. Jr. Clarke Brian Mason |
author_sort |
Roy S. Jr. Clarke |
title |
A new metal-rich mesosiderite from Antarctica, RKPA79015 |
title_short |
A new metal-rich mesosiderite from Antarctica, RKPA79015 |
title_full |
A new metal-rich mesosiderite from Antarctica, RKPA79015 |
title_fullStr |
A new metal-rich mesosiderite from Antarctica, RKPA79015 |
title_full_unstemmed |
A new metal-rich mesosiderite from Antarctica, RKPA79015 |
title_sort |
new metal-rich mesosiderite from antarctica, rkpa79015 |
publisher |
Department of Mineral Sciences, Smithsonian Institution |
publishDate |
1982 |
url |
https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=1380 http://id.nii.ac.jp/1291/00001380/ https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=1380&item_no=1&attribute_id=18&file_no=1 |
geographic |
Antarctic |
geographic_facet |
Antarctic |
genre |
Antarc* Antarctic Antarctica Memoirs of National Institute of Polar Research Polar Research |
genre_facet |
Antarc* Antarctic Antarctica Memoirs of National Institute of Polar Research Polar Research |
op_relation |
https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=1380 http://id.nii.ac.jp/1291/00001380/ AA00733561 Memoirs of National Institute of Polar Research. Special issue, 25, 78-85(1982-12) https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=1380&item_no=1&attribute_id=18&file_no=1 |
_version_ |
1766248267665899520 |