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Structural variation of the Bonin ridge revealed by modeling of seismic and gravity data
https://nied-repo.bosai.go.jp/records/5882
https://nied-repo.bosai.go.jp/records/5882572ea222-b4a4-4134-93ed-2bdcbbaa6eed
Item type | researchmap(1) | |||||||||||||||||||||
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公開日 | 2023-09-20 | |||||||||||||||||||||
タイトル | ||||||||||||||||||||||
言語 | ja | |||||||||||||||||||||
タイトル | Structural variation of the Bonin ridge revealed by modeling of seismic and gravity data | |||||||||||||||||||||
タイトル | ||||||||||||||||||||||
言語 | en | |||||||||||||||||||||
タイトル | Structural variation of the Bonin ridge revealed by modeling of seismic and gravity data | |||||||||||||||||||||
言語 | ||||||||||||||||||||||
言語 | eng | |||||||||||||||||||||
著者 |
Kodaira Shuichi
× Kodaira Shuichi
× Fujiwara Toshiya
× Noguchi Naoto
× Takahashi Narumi
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抄録 | ||||||||||||||||||||||
内容記述タイプ | Other | |||||||||||||||||||||
内容記述 | A previous study of a longitudinal profile along the Bonin ridge concluded that remarkably thin forearc crust (< 10 km thick) along the northern half of the ridge indicates that the crust there was formed by forearc spreading during the initial stage of subduction along the Izu-Bonin intra-oceanic arc. However, a profile across the Bonin ridge shows a thicker crust. In this study, we construct a model that takes into account seismic and gravity data from both profiles. Re-modeling of the seismic data showed a north-south aligned area of thin crust (similar to 10 km thick) at the center of the Bonin ridge; this structure was confirmed by gravity data. The seismic data at the eastern end of the across-arc profile suggests that the crust thickens beneath the trenchward slope of the Bonin ridge. However, a petrological model suggests a trenchward extension of forearc oceanic crust that formed during the initial stage of subduction. Although further detailed investigation is required, we suggest that this contradiction can be explained either by the subduction of buoyant crust immediately beneath the forearc oceanic crust, or by the presence of a serpentinized mantle wedge beneath the forearc oceanic crust. | |||||||||||||||||||||
言語 | en | |||||||||||||||||||||
書誌情報 |
ja : EARTH PLANETS AND SPACE en : EARTH PLANETS AND SPACE 巻 63, 号 9, p. 963-973, 発行日 2011 |
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出版者 | ||||||||||||||||||||||
言語 | en | |||||||||||||||||||||
出版者 | SPRINGEROPEN | |||||||||||||||||||||
ISSN | ||||||||||||||||||||||
収録物識別子タイプ | ISSN | |||||||||||||||||||||
収録物識別子 | 1343-8832 | |||||||||||||||||||||
DOI | ||||||||||||||||||||||
関連識別子 | 10.5047/eps.2011.06.036 |