دورية أكاديمية
P and S Wave Anisotropic Tomography of the Banda Subduction Zone
العنوان: | P and S Wave Anisotropic Tomography of the Banda Subduction Zone |
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المؤلفون: | Yuanyuan Hua, Dapeng Zhao, Yi‐Gang Xu |
المصدر: | Geophysical Research Letters, Vol 50, Iss 18, Pp n/a-n/a (2023) |
بيانات النشر: | Wiley, 2023. |
سنة النشر: | 2023 |
المجموعة: | LCC:Geophysics. Cosmic physics |
مصطلحات موضوعية: | seismic tomography, seismic anisotropy, anisotropic tomography, Banda slab, S wave anisotropy, curved slab, Geophysics. Cosmic physics, QC801-809 |
الوصف: | Abstract In subduction zones with slab‐slab interactions, the pattern of mantle convection is very complex and still unclear. In this study, we jointly invert a large number of P and S wave arrival time data of local earthquakes for 3‐D isotropic and anisotropic velocity structures of the Banda subduction zone. Along the curved Banda arc, the subducting Indo‐Australian slab is detected clearly as a high‐velocity zone, and its azimuthal anisotropy changes along the arc strike, representing fossil anisotropy within the slab and modified anisotropy by the subduction processes. Around the northern edge of the Banda slab, a semi‐toroidal pattern of anisotropy appears in low‐velocity anomalies, representing mantle flow extruded from the Banda arc and escaped from a gap of the Banda‐Molucca slab toward the northeast. Our 3‐D anisotropic tomography uncovers the mantle convection pattern induced by the slab‐slab interactions, shedding new light on the complex dynamical processes in this curved subduction zone. |
نوع الوثيقة: | article |
وصف الملف: | electronic resource |
اللغة: | English |
تدمد: | 1944-8007 0094-8276 |
Relation: | https://doaj.org/toc/0094-8276; https://doaj.org/toc/1944-8007 |
DOI: | 10.1029/2023GL105611 |
URL الوصول: | https://doaj.org/article/9b7307d5307c453494151b399d280663 |
رقم الأكسشن: | edsdoj.9b7307d5307c453494151b399d280663 |
قاعدة البيانات: | Directory of Open Access Journals |
تدمد: | 19448007 00948276 |
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DOI: | 10.1029/2023GL105611 |