| 深地震探测揭示的西北地区莫霍面深度 |
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| 关键词:Northwest China seismic detection Moho depth basin-range coupling geodynamics |
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| The Moho Depth of Northwest China Revealed by Seismic Detection |
| Since the 1970s, lots of research work on deep seismic detection has been conducted in Northwest China. In this paper, the authors have summarized the results of the detection work, and discussed the Moho variation in Northwest China. It is shown that the crustal deformation has changed remarkably in Northwest China: the deepest Moho is beneath the conjunction of west Kunlun and Karakorum, at the depth of about 90 km; the shallowest Moho is beneath the Jayir Mountain to the west of Karamay, about 35.5 km in depth; the Moho depth in the western segments of the Tienshan Mountains is deeper than that in the middle and eastern segments; there exist Moho offsets beneath Altyn fault, northern margin fault of Middle Tienshan and some other places. All these fea-tures suggest that the basin-range coupling in Northwest China, the different uplift mechanism in different seg-ments of Tienshan and the rejuvenation of the old deep faults in Cenozoic were probably caused by the distant consequences of the India-Eurasian collision. |
| XIONG Xiao-song,GAO Rui,LI Qiu-sheng,WANG Hai-yan,HOU He-sheng.2010.The Moho Depth of Northwest China Revealed by Seismic Detection[J].Acta Geoscientica Sinica,31(1):23-31. |
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