2015年6月
Rapid onset of mafic magmatism facilitated by volcanic edifice collapse
GEOPHYSICAL RESEARCH LETTERS
- 巻
- 42
- 号
- 12
- 開始ページ
- 4778
- 終了ページ
- 4785
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1002/2015GL064519
- 出版者・発行元
- AMER GEOPHYSICAL UNION
Volcanic edifice collapses generate some of Earth's largest landslides. How such unloading affects the magma storage systems is important for both hazard assessment and for determining long-term controls on volcano growth and decay. Here we present a detailed stratigraphic and petrological analyses of volcanic landslide and eruption deposits offshore Montserrat, in a subduction zone setting, sampled during Integrated Ocean Drilling Program Expedition 340. A large (6-10km(3)) collapse of the Soufriere Hills Volcano at similar to 130ka was followed by explosive basaltic volcanism and the formation of a new basaltic volcanic center, the South Soufriere Hills, estimated to have initiated <100years after collapse. This basaltic volcanism was a sharp departure from the andesitic volcanism that characterized Soufriere Hills' activity before the collapse. Mineral-melt thermobarometry demonstrates that the basaltic magma's transit through the crust was rapid and from midcrustal depths. We suggest that this rapid ascent was promoted by unloading following collapse.
- リンク情報
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- DOI
- https://doi.org/10.1002/2015GL064519
- Web of Science
- https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000358002500017&DestApp=WOS_CPL
- URL
- https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84948717129&origin=inward
- ID情報
-
- DOI : 10.1002/2015GL064519
- ISSN : 0094-8276
- eISSN : 1944-8007
- SCOPUS ID : 84948717129
- Web of Science ID : WOS:000358002500017