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A COMPOUND AND SUPERIMPOSED THERMAL STRUCTURE OF THE LITHOSPHERE IN THE CONTINENTAL COLLISION OROGENS——A CASE STUDY OF THE SANJIANG REGION OF YUNNAN

Xu Qing;Wang Ji'an;Wang Jiyang South-Central University of Techology, Changsha, Hunan Institute of Geology, Academia Sinica, Beijing  
The thermal structure of the lithosphere in continental collision orogens is afrontier subject in the current study of theoretical geothermics. Based on systematicborehole geotemperature logging, terrestrial heat flow measurements and radiogenicheat production determination, combined with geological and geophysical data, amodel of compound and superimposed thermal structure of the lithosphere in conti-nental collision orogens in the Sanjiang region of Yunnan is proposed. This model isconducive to understanding the deep thermal setting produced by tectonism sincethe Triassic in the region. The distributive pattern of magmatic,volcanic and meta-morphic rocks is discussed from the geothermal perspective.
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