INDEPTH Wide-Angle Reflection Observation of P -Wave-to- S -Wave Conversion from Crustal Bright Spots in Tibet
- 6 December 1996
- journal article
- Published by American Association for the Advancement of Science (AAAS) in Science
- Vol. 274 (5293), 1690-1691
- https://doi.org/10.1126/science.274.5293.1690
Abstract
Three-component wide-angle seismic data acquired in southern Tibet during Project INDEPTH show strong P-to-S converted reflections from reflectors that are aligned at a depth of ∼15 kilometers beneath the northern Yadong-Gulu rift. These converted reflections are locally higher in amplitude than the corresponding P-wave reflections. Modeling of reflection mode conversion as a function of incidence angle indicates that this condition obtains for a reflector that is a solid over fluid interface; it is not typical of a solid-solid interface. The likely candidates for a fluid trapped within the crystalline crust of southern Tibet are granitic magma and water (brine).Keywords
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