title: INDEPTH Wide-Angle Reflection Observation of P-Wave-to-S-Wave Conversion from Crustal Bright Spots in Tibet
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 approximately 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).
authors.affiliation: Y. Makovsky, S. L. Klemperer, L. Ratschbacher, Department of Geophysics, Stanford University, CA 94305-2215, USA. L. D. Brown, Department of Geological Sciences, Cornell University, Ithaca, NY 14853, USA. Ming Li, Wenjin Zhao, and Fanle Meng, Chinese Academy of Geological Sciences, Baiwanzhuang Road 26, Beijing 100037, China.
authors.initials: Y
authors.lastname: Makovsky
authors.initials: SL
authors.lastname: Klemperer
authors.initials: L
authors.lastname: Ratschbacher
authors.initials: LD
authors.lastname: Brown
authors.initials: M
authors.lastname: Li
authors.initials: W
authors.lastname: Zhao
authors.initials: F
authors.lastname: Meng