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Lower crustal fluid distribution in the northeastern Japan arc revealed by high-resolution 3D seismic tomography
https://nied-repo.bosai.go.jp/records/4381
https://nied-repo.bosai.go.jp/records/43816fb0dc57-d2d6-47f9-be47-869fc08052d0
| Item type | researchmap(1) | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 公開日 | 2023-03-30 | |||||||||||||
| タイトル | ||||||||||||||
| 言語 | en | |||||||||||||
| タイトル | Lower crustal fluid distribution in the northeastern Japan arc revealed by high-resolution 3D seismic tomography | |||||||||||||
| 言語 | ||||||||||||||
| 言語 | eng | |||||||||||||
| 著者 |
M Matsubara
× M Matsubara
× N Hirata
× H Sato
× S Sakai
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| 抄録 | ||||||||||||||
| 内容記述タイプ | Other | |||||||||||||
| 内容記述 | The On Backbone Range strikes northwards through the central northeastern Japan arc and is bounded on both sides by the active reverse Uwandaira and Sen'ya faults. We have applied a traveltime inversion method (seismic tomography) with spatial velocity correlation to active and passive seismic data in order to investigate a three-dimensional (3-D) velocity structure. The data set contains 33,993 P- and 18,483 S-wave arrivals from 706 natural sources and 40 blasts, as well as 2803 P-wave traveltime data from 10 explosions detonated during the 1997 controlled source experiment. The traveltime inversion reveals a zone beneath the On Backbone Range in which P-wave velocities (V-P) are approximately 6-8% lower than the average velocity at equivalent depths. The low V-P and a low V-P to S-wave velocity (V-S) ratio (V-P/V-S) of about 1.65 suggest the presence of aqueous fluids in the middle crust. (C) 2004 Elsevier B.V. All rights reserved. | |||||||||||||
| 言語 | en | |||||||||||||
| 書誌情報 |
en : TECTONOPHYSICS 巻 388, 号 1-4, p. 33-45 |
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| 出版者 | ||||||||||||||
| 言語 | en | |||||||||||||
| 出版者 | ELSEVIER SCIENCE BV | |||||||||||||
| ISSN | ||||||||||||||
| 収録物識別子タイプ | ISSN | |||||||||||||
| 収録物識別子 | 0040-1951 | |||||||||||||
| DOI | ||||||||||||||
| 関連識別子 | 10.1016/j.tecto.2004.07.046 | |||||||||||||
