Balanced Cross-Section and Crustal Shortening Analysis in the Tanggula-Tuotuohe Area,Northern Tibet  

作　　者：李亚林 王成善 马超 Ganqing Xu Xixi Zhao 

机构地区：[1]State Key Laboratory of Geological Processes and Mineral Resources, School of the Earth Sciences and Resources, Research Center for Tibetan Plateau Geology, China University of Geosciences, Beijing 100083, China [2]Department of Earth and Ocean Science, University of Waikato, Hamilton, New Zealand [3]Institutes of Geophysics and Planetary Physics, University of California, Santa Cruz, CA95064, USA

出　　处：《Journal of Earth Science》2011年第1期1-10,共10页地球科学学刊（英文版）

基　　金：supported by the National Natural Science Foundation of China (No. 40672086);the Ministry of Science and Technology of China (No. 2006CB701400)

摘　　要：The Tanggula （唐古拉） thrust system and the Tuotuohe （沱沱河） foreland basin, which represent major Cenozoic tectonic units of the central Tibetan plateau, have been recently studied. Field investigation, analyses of deformation and construction of two restored balanced structural sections suggest 75-100 km （51%-64%） of N-S shortening in the Tanggula thrust system and 55-114 km （42%-47%） of N-S shortening in the Tuotuohe basin. The shortening ratios indicate that the Tanggula- Tuotuohe area has undergone intensive deformation and crustal shortening during the Early Tertiary, resulting not only in crustal thickening, but also in large scale volcanism and in rapid uplift of the Tanggula Mountains.The Tanggula （唐古拉） thrust system and the Tuotuohe （沱沱河） foreland basin, which represent major Cenozoic tectonic units of the central Tibetan plateau, have been recently studied. Field investigation, analyses of deformation and construction of two restored balanced structural sections suggest 75-100 km （51%-64%） of N-S shortening in the Tanggula thrust system and 55-114 km （42%-47%） of N-S shortening in the Tuotuohe basin. The shortening ratios indicate that the Tanggula- Tuotuohe area has undergone intensive deformation and crustal shortening during the Early Tertiary, resulting not only in crustal thickening, but also in large scale volcanism and in rapid uplift of the Tanggula Mountains.

关 键 词：Tibetan plateau Tanggula Mountains balanced cross-section crustal shortening uplift. 

分 类 号：P542[天文地球—构造地质学]