論文

査読有り 筆頭著者 国際共著 国際誌
2016年12月16日

Electromagnetic evidence for volatile-rich upwelling beneath the society hotspot, French Polynesia

Geophysical Research Letters
  • Noriko Tada
  • ,
  • Pascal Tarits
  • ,
  • Kiyoshi Baba
  • ,
  • Hisashi Utada
  • ,
  • Takafumi Kasaya
  • ,
  • Daisuke Suetsugu

43
23
開始ページ
12021
終了ページ
12026
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1002/2016GL071331
出版者・発行元
Blackwell Publishing Ltd

We have conducted a seafloor magnetotelluric survey that images, for the first time, three-dimensional electrical conductivity structure in the upper mantle beneath the Society hotspot. A striking feature in our model is a high-conductivity anomaly a few hundred kilometers in diameter, which is continuous from the lowest part of the upper mantle to a depth of approximately 50 km below sea level. Using theoretical and experimental results from mineral physics, we interpret the high-conductivity anomaly as evidence of the melt fraction up to 2.2 vol.%, which is robust regardless of assumed temperature, and the existence of carbonated silicate melt beneath the hotspot. Our results suggest that the Society hotspot is a pathway for ascending volatiles from the deeper part of the upper mantle to the surface.

リンク情報
DOI
https://doi.org/10.1002/2016GL071331
共同研究・競争的資金等の研究課題
三次元電気伝導度構造からスラブとマントルプルームの物性を明らかにする
Scopus
https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85006176689&origin=inward
Scopus Citedby
https://www.scopus.com/inward/citedby.uri?partnerID=HzOxMe3b&scp=85006176689&origin=inward
ID情報
  • DOI : 10.1002/2016GL071331
  • ISSN : 1944-8007
  • ISSN : 0094-8276
  • eISSN : 1944-8007
  • ORCIDのPut Code : 30416885
  • SCOPUS ID : 85006176689

エクスポート
BibTeX RIS