首页|Three-Dimensional Density Distribution and Seismic Activity along the Guxiang-Tongmai Segment of the Jiali Fault,Tibet

Three-Dimensional Density Distribution and Seismic Activity along the Guxiang-Tongmai Segment of the Jiali Fault,Tibet

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  • 国家科技期刊平台
  • NETL
  • NSTL
  • 万方数据
The Guxiang-Tongmai segment of the Jiali fault is situated northeast of the Namche Barwa Syntaxis in northeastern Tibet.It is one of the most active strike-slip faults near the syntaxis and plays a pivotal role in the examination of seismic activity within the eastern Himalayan Syntaxis.New study in the research region has yielded a 1:200000 gravity dataset covering an area 1500 km2.Using wavelet transform multiscale decomposition,scratch analysis techniques,and 3D gravity inversion methods,gravity anomalies,fault distributions,and density structures were determined across various scales.Through the integration of our new gravity data with other geophysical and geological information,our findings demonstrate substantial variations in the overall crustal density within the region,with the fault distribution closely linked to these density fluctuations.Disparities in stratigraphic density are important causes of variations in the capacity of geological formations to endure regional tectonic stress.Earthquakes are predominantly concentrated within the density transition zone and are primarily situated in regions of elevated density.The hanging wall stress within the Guxiang-Tongmai segment of the Jiali fault exhibits a notable concentration,marked by pronounced anisotropy,and is positioned within the density differential zone,which is prone to earthquakes.

seismicitydeep-density structurewavelet transform multi-scale decompositionscratch analysis3D gravity inversionJiali faultTibet

FAN Pengxiao、YU Changqing、WANG Ruixue、ZENG Xiangzhi、QU Chen、ZHANG Yue

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Institute of Land and Resources Engineering Kunming University of Science and Technology,Kunming 650000,China

Institute of Geology,Chinese Academy of Geological Sciences,Beijing 100037,China

Jiangsu Donghai Continental Deep Hole Crustal Activity,National Observation and Research Station,Lianyungang,Jiangsu 222000,China

National Foundation of ChinaNational Foundation of ChinaChina Geological Survey

4194101642174123DD20221630

2024

10.1111/1755-6724.15139

地质学报(英文版)
中国地质学会

地质学报(英文版)

CSTPCD
影响因子：1.414
ISSN：1000-9515
年,卷(期)：2024.98(2)
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