CUMULATE INCLUSIONS FROM TURTLE ROCK, ROSS ISLAND, ANTARCTICA
Ultramafic to mafic cumulate inclusions in Late Cenozoic basanite at Turtle Rock off Ross Island, Antarctica, were used to propose a well-defined compositional variation of the constituent minerals. The Turtle Rock cumulate suite (dunite-wehrlite-clinopyroxenite-gabbro), composed of Fe-rich olivine,...
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Department of Geology and Mineralogy, Faculty of Science, Hokkaido University
1991
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ftnipr:oai:nipr.repo.nii.ac.jp:00002695 2023-05-15T13:49:00+02:00 CUMULATE INCLUSIONS FROM TURTLE ROCK, ROSS ISLAND, ANTARCTICA ニイダ キヨアキ カミヌマ カツタダ シブヤ カズオ Kiyoaki NIIDA Katsutada KAMINUMA Kazuo SHIBUYA 1991-09 https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=2695 http://id.nii.ac.jp/1291/00002695/ https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=2695&item_no=1&attribute_id=18&file_no=1 en eng Department of Geology and Mineralogy, Faculty of Science, Hokkaido University National Institute of Polar Research https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=2695 http://id.nii.ac.jp/1291/00002695/ AA1072335X Proceedings of the NIPR Symposium on Antarctic Geosciences, 5, 146-157(1991-09) https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=2695&item_no=1&attribute_id=18&file_no=1 Departmental Bulletin Paper P(論文) 1991 ftnipr 2022-11-26T19:42:11Z Ultramafic to mafic cumulate inclusions in Late Cenozoic basanite at Turtle Rock off Ross Island, Antarctica, were used to propose a well-defined compositional variation of the constituent minerals. The Turtle Rock cumulate suite (dunite-wehrlite-clinopyroxenite-gabbro), composed of Fe-rich olivine, clinopyroxene, kaersutitic amphibole, plagioclase and Ti-Fe oxide minerals, has undeformed and unmetasomatized igneous cumulate textures. All the ferromagnesian minerals are Fe-rich (100Mg/(Mg+Fe)=87-60). Clinopyroxenes are dominant in the cumulates and are always Fe-, Ti-, and Al-rich fassaitic augites, of which compositional range is separated from that of the upper mantle clinopyroxenes. Kaersutitic amphibole, varying continuously from Ti-pargasite to kaersutite, has a chemical composition typical of amphibole found in subcontinental cumulate xenoliths. Report Antarc* Antarctica Ross Island National Institute of Polar Research Repository, Japan Ross Island Turtle Rock ENVELOPE(166.767,166.767,-77.733,-77.733) |
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Open Polar |
collection |
National Institute of Polar Research Repository, Japan |
op_collection_id |
ftnipr |
language |
English |
description |
Ultramafic to mafic cumulate inclusions in Late Cenozoic basanite at Turtle Rock off Ross Island, Antarctica, were used to propose a well-defined compositional variation of the constituent minerals. The Turtle Rock cumulate suite (dunite-wehrlite-clinopyroxenite-gabbro), composed of Fe-rich olivine, clinopyroxene, kaersutitic amphibole, plagioclase and Ti-Fe oxide minerals, has undeformed and unmetasomatized igneous cumulate textures. All the ferromagnesian minerals are Fe-rich (100Mg/(Mg+Fe)=87-60). Clinopyroxenes are dominant in the cumulates and are always Fe-, Ti-, and Al-rich fassaitic augites, of which compositional range is separated from that of the upper mantle clinopyroxenes. Kaersutitic amphibole, varying continuously from Ti-pargasite to kaersutite, has a chemical composition typical of amphibole found in subcontinental cumulate xenoliths. |
format |
Report |
author |
ニイダ キヨアキ カミヌマ カツタダ シブヤ カズオ Kiyoaki NIIDA Katsutada KAMINUMA Kazuo SHIBUYA |
spellingShingle |
ニイダ キヨアキ カミヌマ カツタダ シブヤ カズオ Kiyoaki NIIDA Katsutada KAMINUMA Kazuo SHIBUYA CUMULATE INCLUSIONS FROM TURTLE ROCK, ROSS ISLAND, ANTARCTICA |
author_facet |
ニイダ キヨアキ カミヌマ カツタダ シブヤ カズオ Kiyoaki NIIDA Katsutada KAMINUMA Kazuo SHIBUYA |
author_sort |
ニイダ キヨアキ |
title |
CUMULATE INCLUSIONS FROM TURTLE ROCK, ROSS ISLAND, ANTARCTICA |
title_short |
CUMULATE INCLUSIONS FROM TURTLE ROCK, ROSS ISLAND, ANTARCTICA |
title_full |
CUMULATE INCLUSIONS FROM TURTLE ROCK, ROSS ISLAND, ANTARCTICA |
title_fullStr |
CUMULATE INCLUSIONS FROM TURTLE ROCK, ROSS ISLAND, ANTARCTICA |
title_full_unstemmed |
CUMULATE INCLUSIONS FROM TURTLE ROCK, ROSS ISLAND, ANTARCTICA |
title_sort |
cumulate inclusions from turtle rock, ross island, antarctica |
publisher |
Department of Geology and Mineralogy, Faculty of Science, Hokkaido University |
publishDate |
1991 |
url |
https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=2695 http://id.nii.ac.jp/1291/00002695/ https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=2695&item_no=1&attribute_id=18&file_no=1 |
long_lat |
ENVELOPE(166.767,166.767,-77.733,-77.733) |
geographic |
Ross Island Turtle Rock |
geographic_facet |
Ross Island Turtle Rock |
genre |
Antarc* Antarctica Ross Island |
genre_facet |
Antarc* Antarctica Ross Island |
op_relation |
https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=2695 http://id.nii.ac.jp/1291/00002695/ AA1072335X Proceedings of the NIPR Symposium on Antarctic Geosciences, 5, 146-157(1991-09) https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=2695&item_no=1&attribute_id=18&file_no=1 |
_version_ |
1766250298272120832 |