中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
首页 机构 成果 学者
  
  1. CAS IR Grid
  2. 地质与地球物理研究所
  3. 中国科学院地质与地球物理研究所
  4. 中国科学院油气资源研究重点实验室
The general dislocation source model and its application to microseismic focal mechanism inversion

文献类型：期刊论文

作者Li, Han2,3; Chang, Xu2,3; Hao, Jinlai1,2; Wang, Yibo2,3
刊名GEOPHYSICS
出版日期2021-07-01
卷号86期号:4页码:KS79-KS93
ISSN号0016-8033
DOI10.1190/GEO2020-0844.1
英文摘要Research on the non-double-couple (NDC) components in an earthquake is important for characterizing true source processes. The moment-tensor (MT) source model is commonly used to study NDC earthquakes. However, MT inversions are still challenging when earthquakes have small magnitudes, especially microearthquakes. The general-dislocation (GD) model specifies the focal mechanism as a shear-tensile slip on a fault plane; thus, GD inversion is better constrained than MT inversion. We focus on GD model-based waveform forward modeling and its application to microseismic source inversions. We expand the generalized reflection-transmission matrix method to synthesize waveforms based on the GD model and fully describe a GD source with five parameters: the scalar seismic moment (which defines the magnitude) and the strike, dip, rake, and slope angles (which define the fault geometry). We compare the GD, MT, and double-couple models and introduce the differences in their characterization and wave synthesis theories. We have developed a GD model-based microseismic focal mechanism inversion method that requires calculating only four angles under hybrid constraints. Two sets of solutions correspond to the same seismograms in a GD model-based inversion. These two solutions have the same scalar seismic moment and slope angle but different strike, dip, and rake angles, and we have derived formulas for mapping from one solution to the other. Synthetic and field surface microseismic data sets are used to test our GD model-based modeling and inversion methods. According to our study, the GD model is effective in micro-seismic focal mechanism inversion. By developing specific wave synthesis and inversion methods for the GD model, we offer a novel perspective to study this model and the NDC mechanisms for hydraulic fracturing-induced micro-earthquakes.
WOS关键词DOUBLE-COUPLE EARTHQUAKES ; MOMENT-TENSOR INVERSION ; SHALLOW EARTHQUAKES ; SEISMIC EVENTS ; TENSILE ; SHEAR ; RESOLUTION ; MICROEARTHQUAKES ; PARAMETERS ; COMPONENT
资助项目National Natural Science Foun-dation of China[41804050] ; National Natural Science Foun-dation of China[41974156] ; China National Petroleum Corporation
WOS研究方向Geochemistry & Geophysics
语种英语
WOS记录号WOS:000684977500003
出版者SOC EXPLORATION GEOPHYSICISTS
资助机构National Natural Science Foun-dation of China ; National Natural Science Foun-dation of China ; National Natural Science Foun-dation of China ; National Natural Science Foun-dation of China ; China National Petroleum Corporation ; China National Petroleum Corporation ; China National Petroleum Corporation ; China National Petroleum Corporation ; National Natural Science Foun-dation of China ; National Natural Science Foun-dation of China ; National Natural Science Foun-dation of China ; National Natural Science Foun-dation of China ; China National Petroleum Corporation ; China National Petroleum Corporation ; China National Petroleum Corporation ; China National Petroleum Corporation ; National Natural Science Foun-dation of China ; National Natural Science Foun-dation of China ; National Natural Science Foun-dation of China ; National Natural Science Foun-dation of China ; China National Petroleum Corporation ; China National Petroleum Corporation ; China National Petroleum Corporation ; China National Petroleum Corporation ; National Natural Science Foun-dation of China ; National Natural Science Foun-dation of China ; National Natural Science Foun-dation of China ; National Natural Science Foun-dation of China ; China National Petroleum Corporation ; China National Petroleum Corporation ; China National Petroleum Corporation ; China National Petroleum Corporation
源URL[http://ir.iggcas.ac.cn/handle/132A11/101885]  
专题地质与地球物理研究所_中国科学院油气资源研究重点实验室
地质与地球物理研究所_中国科学院地球与行星物理重点实验室
通讯作者Chang, Xu
作者单位1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Earth & Planetary Phys, Beijing 100029, Peoples R China
2.Chinese Acad Sci, Innovat Acad Earth Sci, Beijing 100029, Peoples R China
3.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Petr Resource Res, Beijing 100029, Peoples R China
推荐引用方式
GB/T 7714		 Li, Han,Chang, Xu,Hao, Jinlai,et al. The general dislocation source model and its application to microseismic focal mechanism inversion[J]. GEOPHYSICS,2021,86(4):KS79-KS93.
APA Li, Han,Chang, Xu,Hao, Jinlai,&Wang, Yibo.(2021).The general dislocation source model and its application to microseismic focal mechanism inversion.GEOPHYSICS,86(4),KS79-KS93.
MLA Li, Han,et al."The general dislocation source model and its application to microseismic focal mechanism inversion".GEOPHYSICS 86.4(2021):KS79-KS93.

入库方式： OAI收割

来源：地质与地球物理研究所

浏览0
下载0
收藏0
其他版本

除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。