Sn velocity tomography beneath the Himalayan collision zone and surrounding regions
作者单位：Institute of Geology and GeophysicsChinese Academy of Sciences School of Earth and Space SciencesUniversity of Science and Technology of China Key Laboratory of Dynamical GeodesyInstitute of Geodesy and GeophysicsChinese Academy of Sciences Key Laboratory of Continental Collision and Plateau upliftInstitute of Tibetan Plateau ResearchChinese Academy of Sciences
会议名称：《中国科学院地质与地球物理研究所2013年度（第13届）学术年会》
会议日期：2014年
学科分类：070904[理学-构造地质学] 0709[理学-地质学] 07[理学]
基 金：supported by the China Postdoctoral Science Foundation 2012M510043 and 2013T60166 the National Nature Science Foundation of China(Grant Nos.41074031, 40940021,41174036) the China Earthquake Program 200808078 the CAS/SAFEA International Parmership Program for Creative Research Teams(Grant No.KZZD-EW-TZ-05)
关 键 词：Sn velocity tomography Indian plate
摘 要：We present a tomographic Sn velocity model of the uppermost mantle beneath the Himalayan collision zone and surrounding regions.A total of 43,905 Sn phases are used in the *** average Sn velocity in the study area is approximately 4.6 km/s,and the velocity perturbations reach 0.2 km/*** Sn velocity distribution is consistent with Pn tomography results obtained *** velocities are found under the Indian plate, the Tarim Basin,and the Sichuan Basin,whereas low Sn velocities are found beneath the Myanmar region,the Hindu-Kush region,and the Lhasa block and western Qiangtang *** results support the idea that the lithosphere of the Indian plate is subducted into the mantle and causes the upwelling of hot *** eastwest variability of the Sn velocity beneath the Indian plate and southern Tibet indicates that the underthrusting of the Indian continental lithosphere may be in a piecewise *** differences between the thermal structure of the crust and upper mantle in southern Tibet suggest that this region may be represented by a tectonic model of hot crust and cold mantle,supporting the idea that crustal material flow may occur in this region.