Collaborative Research: Seismotectonics and Structure of Creeping Thrusts and Mountain Building of the Himalaya

合作研究：地震构造学、蠕动逆冲构造和喜马拉雅山造山

• 批准号: 9903768
• 负责人: Francis Wu
• 金额: $ 27.03万
• 依托单位: SUNY at Binghamton
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2000
• 资助国家: 美国
• 起止时间: 2000-04-01 至 2005-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9903768&HistoricalAwards=false
• 关键词: Collaborative; Research; Seismotectonics; Structure; Creeping

EAR-9903768WU, Francis T.Since the Himalayan orogeny is very active, the accompanying earthquake seismicity can be used to test tectonic models of faulting. Knowledge of the seismicity in the region is so far limited, based on single component local network and teleseismic recordings. This project will deploy 21 broadband seismometers in eastern Nepal and southern Tibet. The main studies and their purposes are: (1) teleseismic P and S arrival times and waveforms will be used to decipher the general crustal and upper mantle structures under the Himalaya to determine the presence of subduction zone and other structures, (2) the arrival times of hundreds of earthquakes under the orogen will be used to image the 3-D crustal structures underneath the Himalaya and relocate earthquakes to determine the internal structure and rheology of the orgogen, (3) SKS anisotropy under the Himalaya will be used to map upper mantle flow, and (4) focal mechanisms from regional moment tensor inversion will be used to determine kinematics of orogenic deformation.

由于喜马拉雅造山带非常活跃，伴随的地震活动性可以用来检验断层的构造模式。 迄今为止，对该地区地震活动性的了解是有限的，基于单分量本地网络和地震记录。 该项目将在尼泊尔东部和西藏南部部署21台宽带地震仪。 主要研究及其目的是：（1）利用地球物理P、S波到时和波形，对喜马拉雅山下地壳和上地幔的总体结构进行解密，以确定俯冲带和其他构造的存在，（2）造山带下数百次地震的到达时间将用于成像3-三维地壳结构和重定位地震，以确定内部结构和流变学的造山带，（3）SKS各向异性下喜马拉雅将用于映射上地幔流动，（4）利用区域矩张量反演的震源机制解来确定造山变形的运动学。