Crust-mantle structure feature and the seismic activity of the main tectonic units in the North Tanlu fault zone |
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| Authors: | XUE NIU ZAO-XUN LU DE-LU JIANG QING-QING LEI SHENG-CHANG SHI |
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| Institution: | Seismological Bureau of Liaoning Province, Shenyang 110031, China |
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| Abstract: | Using recent data of geoscience transaction in Northeast China, the author analyses and studies the crust-upper mantle structure feature of the North Tanlu fault zone. The result shows the crust-mantle structure are obvious difference at both sides of the North Tanlu fault zone. The fault activity and segmentation are closely related with abruptly change zone of the crust-upper mantle structure. There is a clear mirror image relationship between the big geomorphic shape and asthenosphere undulate, the former restricts tectonic stability and tectonic style of dif- ferent crustal units. The significantly strengthening seismicity of north set and south set in the North Tanlu fault zone just correspond to the low-velocity and high conductivity layer of crust-upper mantle. In the North Tanlu fault zone, the main controlling structure of the mid-strong seismic generally consists of the active fault sectors, whose crust-mantle structure is more complicated in rigidity massif. |
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| Keywords: | North Tanlu fsult zone crust-upper mantle structure low velocity-high conductivity layer seismicity |
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