Item type |
学術雑誌論文 / Journal Article(1) |
公開日 |
2022-05-13 |
タイトル |
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タイトル |
How strong was pedogenesis in Schirmacher Oasis during the Late Quaternary? |
タイトル |
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言語 |
en |
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タイトル |
How strong was pedogenesis in Schirmacher Oasis during the Late Quaternary? |
言語 |
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言語 |
eng |
キーワード |
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言語 |
en |
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主題Scheme |
Other |
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主題 |
Iron oxides |
キーワード |
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言語 |
en |
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主題Scheme |
Other |
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主題 |
Magnetic grain size |
キーワード |
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言語 |
en |
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主題Scheme |
Other |
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主題 |
Pedogenesis |
キーワード |
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言語 |
en |
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主題Scheme |
Other |
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主題 |
Environmental magnetism |
キーワード |
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言語 |
en |
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主題Scheme |
Other |
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主題 |
Schirmacher oasis |
キーワード |
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言語 |
en |
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主題Scheme |
Other |
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主題 |
East Antarctica |
資源タイプ |
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資源タイプ識別子 |
http://purl.org/coar/resource_type/c_6501 |
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資源タイプ |
journal article |
アクセス権 |
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アクセス権 |
metadata only access |
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アクセス権URI |
http://purl.org/coar/access_right/c_14cb |
著者 |
Warrier, Anish Kumar
Mahesh, B.S.
Sebastian, Joju George
Mohan, Rahul
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抄録 |
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内容記述タイプ |
Abstract |
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内容記述 |
We compare the sediment magnetic properties of two lakes in Schirmacher Oasis, East Antarctica and discuss the intensity of pedogenesis during the Late Quaternary. The magnetic minerals are land-derived with no obliteration of the signal due to bacterial or anthropogenic sources. The magnetic grains of Lake L-49 are much smaller in size compared to Lake Sandy's (low ratio values of IRM20mT/ARM and S20 ). The iron oxide minerals in Lake Sandy's sediments are coarse stable single domain (SSD) and multi-domain (MD) grains with the SSD concentration increasing during the Holocene. Percentage frequency-dependent susceptibility, a marker for pedogenic iron oxide minerals shows a similar trend for Lake Sandy, with the values remaining low during the Last Glacial Stage (LGS) and increasing towards the Holocene. Such a pattern is not observed in the sediments of Lake L-49. Principal Component Analysis reveals a relatively stronger intensity of pedogenesis in the Lake Sandy catchment during the deglaciation. From the data, we observe that even though pedogenesis is active, the intensity is not strong enough to form superparamagnetic (SP) grains. The peaks in χfd for both the lakes show a direct relationship with Antarctic Isotope Maximum events recorded in an ice-core data suggesting that χfd can be used as a proxy for paleo-pedogenesis in Antarctica. |
書誌情報 |
en : Polar Science
巻 30,
p. 100636,
発行日 2021-12
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ISSN |
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収録物識別子タイプ |
ISSN |
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収録物識別子 |
18739652 |
DOI |
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識別子タイプ |
DOI |
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関連識別子 |
https://doi.org/10.1016/j.polar.2021.100636 |
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関連名称 |
10.1016/j.polar.2021.100636 |