A preliminary study on the lithospheric thermal structure and rheology of the Tibetan plateau  

作　　者：Yang Wang 

机构地区：[1]Division of Petrology,School of Earth Sciences and Resources,China University of Geosciences

出　　处：《Earthquake Science》2012年第5期399-408,共10页地震学报（英文版）

基　　金：supported by the Fundamental Research Funds for the Central Universities (Grant Nos. 2652013021 and2010ZD15)

摘　　要：The lithosphere temperature beneath the Tibetan plateau was estimated by local isostasy equilib- rium constrained geothermal calculation. Maps of the lateral temperature variation at depths of 40 km, 70 km, and Moho are presented for the Tibetan plateau, and the thermal thickness of the lithosphere is also presented. The Tibetan plateau has a warm and thick lithospheres, but the thinner lithospheres are identified in the north- ern Tibet and the eastern margin of the plateau. The warm and soft lithospheres in the Tibetan plateau may represent a snapshot of the early stage of convective thinning of the convergent lithosphere. The ＂creme brulee＂ layering demonstrates the rheological behavior of the Tibetan plateau.The lithosphere temperature beneath the Tibetan plateau was estimated by local isostasy equilib- rium constrained geothermal calculation. Maps of the lateral temperature variation at depths of 40 km, 70 km, and Moho are presented for the Tibetan plateau, and the thermal thickness of the lithosphere is also presented. The Tibetan plateau has a warm and thick lithospheres, but the thinner lithospheres are identified in the north- ern Tibet and the eastern margin of the plateau. The warm and soft lithospheres in the Tibetan plateau may represent a snapshot of the early stage of convective thinning of the convergent lithosphere. The ＂creme brulee＂ layering demonstrates the rheological behavior of the Tibetan plateau.

关 键 词：GEOTHERM ISOSTASY RHEOLOGY LITHOSPHERE Tibetan plateau 

分 类 号：P314.2[天文地球—固体地球物理学]