Abstract: More than 20 heat flow data in Yunnan Province have been reported in this paper. Based on the distribution pattern of heat flow and available relevant data,several geologic-heat flow zones are outlined. Moreover,the distribution of temperature and partitioned surface heat flow for the crust in the region is further analysed in combining with data from deep geophysical soundings and the measurements of thermal conductivity and radiogenic heat production of the rock samples. The obtained result verifies the divided geologic-heat flow belts. The high heat flow in most parts of the Yunnan Province,except the southeastern part,can be attributed to the intense geotectonic activity in the region.A large number of active faults and the striking difference in deep geotherms are the prerequisites for the high intensity and high frequency of earthquakes in the region. The intense recent magmatic activity also occurred in the area west of Lujiang River,characterized by the typical geothermal features of plate convergence area.

Key words: Heat flow, Geologic-heat flow belt, Geothermal structure of the crust, Geothermal gradient zone, Ynnnau

摘要： 本文报道了云南20多个大地热流测试数据。据热流分布特点并参考前人有关资料,结合地球物理测深资料、岩石热物性与放射性生热率测试数据,对各区地壳深度范围的温度、热流配分组成作了粗略分析,划分出各有特征的若干地质-热流区。云南普遍地热偏高(滇东南小范围除外)的主要原因是新构造运动强烈;怒江以西近代岩浆活动亦强烈,具有典型的板块交汇带的基本地热特点。

关键词: 大地热流, 地质热流带, 地壳热结构, 云南