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《Regional Geology of China》 2002-11
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Preliminary division of tectonic units of the Qinghai-Tibet Plateau and its adjacent regions

PAN Guitang LI Xingzhen WANG Liquan DING Jun CHEN Zhiliang (Chengdu Institute of Geology and Mineral Resources,China Geological Survey,Chengdu610082,Sichuan,China)  
The division of tectonic units of the Qinghai-Tibet Plateau and its adjacent regions is currently not only the key to studying the minute configuration of plate tectonics but also a basic theoretical prob-lem of studying the intraplate tectonics.Based on the previous work,combined with the results of the new-round1∶250000regional geological survey,the framework of tectonic units of the Qinghai-Tibet Plateau and its adjacent regions is proposed according to the understanding that the formation of the archipelagic arc-basin system is the indication of the transformation of the oceanic lithosphere to continental lithosphere.The arc-arc,arc-continent and continent-continent collision zones and the continental blocks and magmatic arcs sandwiched in between are regarded as the first-order units,which constitute the basic framework.With the southern Kunlun subduction -collision zone and Bangong Co -Dêngqên -Bitu -Changning-Menglian suture as the boundaries the following tectonic areas may be determined from north-east to southwest:the Early Paleozoic Qinling-Qilian-Kunlun tectonic area of the pan-Cathaysian conti-nent ,the Late Paleozoic-Triassic Qiangtang-Sanjiang(Jinsha,Lanchang and Nujiang rivers)tectonic area of the pan-Cathaysian continent and the Late Paleozoic-Mesozoic Gangdise-Himalaya tectonic area on the northern margin of Gondwana.The determination of the above geological units is not only of great aca-demic significance for the geological science research on the Qinghai-Tibet Plateau and in its adjacent re-gions but also of practical significance for regional geological survey(scale1∶250000)and analysis of geo-logical conditions for mineral deposit formation in the bland areas of the Qinghai-Tibet Plateau.
【Fund】: 中国地质调查局基础地质综合研究项目(200113900069)“青藏高原地质构造及其资源环境效应研究”成果。
【CateGory Index】: P544
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