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https://hdl.handle.net/20.500.14094/90004271
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2024-03-28
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90004271 (fulltext)
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メタデータID
90004271
アクセス権
open access
出版タイプ
Version of Record
タイトル
Electrical conductivity of old oceanic mantle in the northwestern Pacific I: 1-D profiles suggesting differences in thermal structure not predictable from a plate cooling model
著者
Baba, Kiyoshi ; Tada, Noriko ; Matsuno, Tetsuo ; Liang, Pengfei ; Li, Ruibai ; Zhang, Luolei ; Shimizu, Hisayoshi ; Abe, Natsue ; Hirano, Naoto ; Ichiki, Masahiro ; Utada, Hisashi
著者名
Baba, Kiyoshi
著者名
Tada, Noriko
著者ID
A1738
研究者ID
1000080512508
KUID
https://kuid-rm-web.ofc.kobe-u.ac.jp/profile/ja.f36eb06abba9e630520e17560c007669.html
著者名
Matsuno, Tetsuo
松野, 哲男
マツノ, テツオ
所属機関名
海洋底探査センター
著者名
Liang, Pengfei
著者名
Li, Ruibai
著者名
Zhang, Luolei
著者名
Shimizu, Hisayoshi
著者名
Abe, Natsue
著者名
Hirano, Naoto
著者名
Ichiki, Masahiro
著者名
Utada, Hisashi
収録物名
Earth, Planets and Space
巻(号)
69
ページ
111-111
出版者
Springer Verlag
刊行日
2017-08-15
公開日
2017-10-27
抄録
Seafloor magnetotelluric (MT) experiments were recently conducted in two areas of the northwestern Pacific to investigate the nature of the old oceanic upper mantle. The areas are far from any tectonic activity, and "normal" mantle structure is therefore expected. The data were carefully analyzed to reduce the effects of coastlines and seafloor topographic changes, which are significant boundaries in electrical conductivity and thus distort seafloor MT data. An isotropic, one-dimensional electrical conductivity profile was estimated for each area. The profiles were compared with those obtained from two previous study areas in the northwestern Pacific. Between the four profiles, significant differences were observed in the thickness of the resistive layer beyond expectations based on cooling of homogeneous oceanic lithosphere over time. This surprising feature is now further clarified from what was suggested in a previous study. To explain the observed spatial variation, dynamic processes must be introduced, such as influence of the plume associated with the formation of the Shatsky Rise, or spatially non-uniform, small-scale convection in the asthenosphere. There is significant room of further investigation to determine a reasonable and comprehensive interpretation of the lithosphere-asthenosphere system beneath the northwestern Pacific. The present results demonstrate that electrical conductivity provides key information for such investigation.
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海洋底探査センター
学術雑誌論文
権利
© The Author(s) 2017.
This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
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資源タイプ
journal article
言語
English (英語)
eISSN
1880-5981
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関連情報
DOI
https://doi.org/10.1186/s40623-017-0697-0
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