Composition of dirt layers in the bare ice areas near the Yamato Mountains in Queen Maud Land and the Allan Hills in Victoria Land, Antarctica
Dirt layers of tephra were found on the bare ice surface in the Meteorite Ice Field near the Yamato Mountains, Queen Maud Land, and in the bare ice area near the Allan Hills, Victoria Land. Their age is unknown but supposed to be several to several tens of thousands of years. Their constituent fragm...
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ftnipr:oai:nipr.repo.nii.ac.jp:00001683 2023-05-15T13:47:59+02:00 Composition of dirt layers in the bare ice areas near the Yamato Mountains in Queen Maud Land and the Allan Hills in Victoria Land, Antarctica Takayoshi Katsushima Fumihiko Nishio Hirokazu Ohmae Masao Ishikawa Shuhei Takahashi 1984-12 https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=1683 http://id.nii.ac.jp/1291/00001683/ https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=1683&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/The Institute of Low Temperature Science, Hokkaido University/The Institute of Low Temperature Science, Hokkaido University/Kitami Institute of Technology https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=1683 http://id.nii.ac.jp/1291/00001683/ AA00733561 Memoirs of National Institute of Polar Research. Special issue, 34, 174-187(1984-12) https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=1683&item_no=1&attribute_id=18&file_no=1 Departmental Bulletin Paper P(論文) 1984 ftnipr 2022-11-12T19:42:29Z Dirt layers of tephra were found on the bare ice surface in the Meteorite Ice Field near the Yamato Mountains, Queen Maud Land, and in the bare ice area near the Allan Hills, Victoria Land. Their age is unknown but supposed to be several to several tens of thousands of years. Their constituent fragments are well-sorted and composed mainly of volcanic glass shards with minor amounts of crystal fragments. Glass shards of tephra from the Yamato Mountains region have a composition of tholeiitic andesite which is low alkali and high iron but not so enriched in titanium, and the associated crystal fragments consist of calcic plagioclase, subcalcic clinopyroxene, orthopyroxene and magnetite. Such character of island arc tholeiite of the tephra indicates its source to be some volcano in the South Sandwich Islands. On the other hand, the tephra from the Allan Hills region is composed of glass shards with trachybasaltic composition and crystal fragments of titanaugite, calcic plagioclase, kaersutite, olivine, rhonite and titanomagnetite. Some young volcano of the McMurdo Volcanic Group is suggested to be a possible source of the tephra. Report Antarc* Antarctica Memoirs of National Institute of Polar Research Polar Research Queen Maud Land South Sandwich Islands Victoria Land National Institute of Polar Research Repository, Japan Victoria Land Sandwich Islands South Sandwich Islands Yamato ENVELOPE(35.583,35.583,-71.417,-71.417) Queen Maud Land ENVELOPE(12.000,12.000,-72.500,-72.500) Allan Hills ENVELOPE(159.667,159.667,-76.717,-76.717) |
institution |
Open Polar |
collection |
National Institute of Polar Research Repository, Japan |
op_collection_id |
ftnipr |
language |
English |
description |
Dirt layers of tephra were found on the bare ice surface in the Meteorite Ice Field near the Yamato Mountains, Queen Maud Land, and in the bare ice area near the Allan Hills, Victoria Land. Their age is unknown but supposed to be several to several tens of thousands of years. Their constituent fragments are well-sorted and composed mainly of volcanic glass shards with minor amounts of crystal fragments. Glass shards of tephra from the Yamato Mountains region have a composition of tholeiitic andesite which is low alkali and high iron but not so enriched in titanium, and the associated crystal fragments consist of calcic plagioclase, subcalcic clinopyroxene, orthopyroxene and magnetite. Such character of island arc tholeiite of the tephra indicates its source to be some volcano in the South Sandwich Islands. On the other hand, the tephra from the Allan Hills region is composed of glass shards with trachybasaltic composition and crystal fragments of titanaugite, calcic plagioclase, kaersutite, olivine, rhonite and titanomagnetite. Some young volcano of the McMurdo Volcanic Group is suggested to be a possible source of the tephra. |
format |
Report |
author |
Takayoshi Katsushima Fumihiko Nishio Hirokazu Ohmae Masao Ishikawa Shuhei Takahashi |
spellingShingle |
Takayoshi Katsushima Fumihiko Nishio Hirokazu Ohmae Masao Ishikawa Shuhei Takahashi Composition of dirt layers in the bare ice areas near the Yamato Mountains in Queen Maud Land and the Allan Hills in Victoria Land, Antarctica |
author_facet |
Takayoshi Katsushima Fumihiko Nishio Hirokazu Ohmae Masao Ishikawa Shuhei Takahashi |
author_sort |
Takayoshi Katsushima |
title |
Composition of dirt layers in the bare ice areas near the Yamato Mountains in Queen Maud Land and the Allan Hills in Victoria Land, Antarctica |
title_short |
Composition of dirt layers in the bare ice areas near the Yamato Mountains in Queen Maud Land and the Allan Hills in Victoria Land, Antarctica |
title_full |
Composition of dirt layers in the bare ice areas near the Yamato Mountains in Queen Maud Land and the Allan Hills in Victoria Land, Antarctica |
title_fullStr |
Composition of dirt layers in the bare ice areas near the Yamato Mountains in Queen Maud Land and the Allan Hills in Victoria Land, Antarctica |
title_full_unstemmed |
Composition of dirt layers in the bare ice areas near the Yamato Mountains in Queen Maud Land and the Allan Hills in Victoria Land, Antarctica |
title_sort |
composition of dirt layers in the bare ice areas near the yamato mountains in queen maud land and the allan hills in victoria land, antarctica |
publisher |
Department of Geology and Mineralogy, Faculty of Science, Hokkaido University/National Institute of Polar Research/The Institute of Low Temperature Science, Hokkaido University/The Institute of Low Temperature Science, Hokkaido University/Kitami Institute of Technology |
publishDate |
1984 |
url |
https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=1683 http://id.nii.ac.jp/1291/00001683/ https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=1683&item_no=1&attribute_id=18&file_no=1 |
long_lat |
ENVELOPE(35.583,35.583,-71.417,-71.417) ENVELOPE(12.000,12.000,-72.500,-72.500) ENVELOPE(159.667,159.667,-76.717,-76.717) |
geographic |
Victoria Land Sandwich Islands South Sandwich Islands Yamato Queen Maud Land Allan Hills |
geographic_facet |
Victoria Land Sandwich Islands South Sandwich Islands Yamato Queen Maud Land Allan Hills |
genre |
Antarc* Antarctica Memoirs of National Institute of Polar Research Polar Research Queen Maud Land South Sandwich Islands Victoria Land |
genre_facet |
Antarc* Antarctica Memoirs of National Institute of Polar Research Polar Research Queen Maud Land South Sandwich Islands Victoria Land |
op_relation |
https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=1683 http://id.nii.ac.jp/1291/00001683/ AA00733561 Memoirs of National Institute of Polar Research. Special issue, 34, 174-187(1984-12) https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=1683&item_no=1&attribute_id=18&file_no=1 |
_version_ |
1766248301636616192 |