| 由地震探测揭示的青藏高原莫霍面深度 |
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| 关键词:Qinghai-Tibet plateau seismic detection Moho depth Geodynamics |
| 基金项目:国家自然科学基金项目(编号: 40830316, 40874045)，国际科技合作项目(2006DFA21340)和国家专项SINOPROBE-02 |
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| 摘要: |
| The Moho Depth of Qinghai-Tibet Plateau Revealed by Seismic Detection |
| The Qinghai-Tibet plateau is the newest and biggest orogenic belt in the world and can serve as a natural laboratory for studying such aspects of continental geodynamics as continent-continent collision, convergence, subduction and plateau uplift. From the 1950s to the present, lots of active-source (deep seismic sounding and deep seismic reflection profiling) and passive-source seismic detection (broadband seismic observation) researches have been carried out to reveal the crust-mantle structure. In this paper, the authors have mainly summarized three seismic detection methods for revealing the Moho depth of the Qinghai-Tibet plateau based on previous achieve-ments. The results show that the Moho of the Qinghai-Tibet plateau is very complex and its depth varies from place to place, and that the Moho is on the whole deeper beneath the south than beneath the north and deeper in the west than in the east. It is also revealed that the Moho in the Qiangtang terrane, the hinterland of the Qinghai-Tibet plateau, is shallower than that on both the southern and the northern sides of the Qinghai-Tibet plateau, and that the deepest Moho is 40 km deeper than the shallowest Moho. Such a trend has recorded the crustal thickening and thinning caused by the mutual response between the India plate and the Eurasia plate as well as the eastward mass flow in the Qinghai-Tibet plateau. |
| GAO Rui,XIONG Xiao-song,LI Qiu-sheng,LU Zhan-wu.2009.The Moho Depth of Qinghai-Tibet Plateau Revealed by Seismic Detection[J].Acta Geoscientica Sinica,30(6):761-773. |
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