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  1. 040 理学部
  2. 0401 学術論文

Continental weathering in the Early Triassic in Himalayan Tethys, central Nepal: Implications for abrupt environmental change on the northern margin of Gondwanaland

http://hdl.handle.net/10091/00021459
http://hdl.handle.net/10091/00021459
1e3e9b01-d9be-4dda-bd88-ab73c5797686
名前 / ファイル ライセンス アクション
26400485_04.pdf 26400485_04.pdf (7.6 MB)
Item type 学術雑誌論文 / Journal Article(1)
公開日 2019-05-16
タイトル
タイトル Continental weathering in the Early Triassic in Himalayan Tethys, central Nepal: Implications for abrupt environmental change on the northern margin of Gondwanaland
言語
言語 eng
DOI
関連識別子 https://doi.org/10.1016/j.jseaes.2013.09.011
関連名称 10.1016/j.jseaes.2013.09.011
キーワード
主題 Triassic, Tethys, Chemical weathering, Climate change, Gondwana
資源タイプ
資源 http://purl.org/coar/resource_type/c_6501
タイプ journal article
著者 Yoshida, Kohki

× Yoshida, Kohki

Yoshida, Kohki

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Kawamura, Toshio

× Kawamura, Toshio

Kawamura, Toshio

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Suzuki, Shigeyuki

× Suzuki, Shigeyuki

Suzuki, Shigeyuki

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Regmi, Amar Deep

× Regmi, Amar Deep

Regmi, Amar Deep

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Gyawali, Babu Ram

× Gyawali, Babu Ram

Gyawali, Babu Ram

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Shiga, Yuka

× Shiga, Yuka

Shiga, Yuka

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Adachi, Yoshiko

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Adachi, Yoshiko

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Dhital, Megh Raj

× Dhital, Megh Raj

Dhital, Megh Raj

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信州大学研究者総覧へのリンク
氏名 Yoshida, Kohki
URL http://soar-rd.shinshu-u.ac.jp/profile/ja.umThOUkh.html
出版者
出版者 PERGAMON-ELSEVIER SCIENCE LTD
引用
内容記述 JOURNAL OF ASIAN EARTH SCIENCES.79, Part A:288-301(2014)
書誌情報 JOURNAL OF ASIAN EARTH SCIENCES

巻 79, p. 288-301, 発行日 2014-01-05
抄録
内容記述 The geochemistry of Triassic mudstones in the Himalayan Tethys sequence, central Nepal, was studied with respect to changes in sedimentary facies, grain size, and source rocks. The Triassic sedimentary facies of mudstone and carbonates show deposition in offshore to hemiplegic environments. The rare earth element (REE) pattern of the Permian and Triassic mudstones suggests uniformity correlatable to average shale. The major element geochemistry of the Early Triassic Griesbachian-early Smithian mudstones indicates a sediment supply from strongly weathered sources with the chemical index of alteration (CIA) values of 76–81. However, the mudstones in the late Smithian show weakly weathered sources with CIA values of 68–74. The lower part of the Middle Triassic Anisian mudstones return to Early Triassic paleoweathering levels. There are no significant relationships among lithofacies, the grain size of the sediments, and CIA values. Thus, the abrupt change of the degree of paleoweathering in the Early Triassic, late Smithian time, suggests a dramatic decrease in continental weathering, which is related to a predominantly arid climate in the northern marginal area of Gondwana.
資源タイプ(コンテンツの種類)
ISSN
収録物識別子タイプ ISSN
収録物識別子 1367-9120
書誌レコードID
収録物識別子タイプ NCID
収録物識別子 AA11138796
権利
権利情報 © 2013 Elsevier Ltd. All rights reserved. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
出版タイプ
出版タイプ AM
出版タイプResource http://purl.org/coar/version/c_ab4af688f83e57aa
WoS
URL http://gateway.isiknowledge.com/gateway/Gateway.cgi?&GWVersion=2&SrcAuth=ShinshuUniv&SrcApp=ShinshuUniv&DestLinkType=FullRecord&DestApp=WOS&KeyUT=000330604900023
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Cite as

Yoshida, Kohki, Kawamura, Toshio, Suzuki, Shigeyuki, Regmi, Amar Deep, Gyawali, Babu Ram, Shiga, Yuka, Adachi, Yoshiko, Dhital, Megh Raj, 2014, Continental weathering in the Early Triassic in Himalayan Tethys, central Nepal: Implications for abrupt environmental change on the northern margin of Gondwanaland: PERGAMON-ELSEVIER SCIENCE LTD, 288–301 p.

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