Abstract: This paper provides 14 values of-geothermal heat flow obtaind from the geothermal measurement of 26 wells. Based on these data the characteristics of the geothermal field in Yunnan region have been described as follows: Either the distribution of geothermal heat flow, or the variation of temperature gradient displays high value in the west of Lancangjiang river, the northern segment of Honghe fault zone, as well as Kunming and Eshan region. Low value occurs to the east of Xiaojiang fault zone in eastern Yunnan, and also in the region between the Xiaojiang and Honghe fault zones, including Chuxiong, Binchuan and Xiangyun. In other words, the geothermal field in Yunnan Province is characterized by high value in the west and low value in the east of the region, showing a tendency of gradual decreasing from the west to the east.The high value of geothermal heat flow in Yunnan region can be attributed to the fact that it lies in the transitional belt between two major siesmic zones in the world. The Yunnan region is similar to island arc in high value of geothermal heat flow and violent Cenozoic tectonic movement. Most of the strong earthquakes occurred along deep large fault zones, which has causative relation with current movement of earth's crust and plate tectonic motion.An analysis has been made on the inhomogeneity, which affects the development and occurrence of earthquake, in different tectonic units from the west to the east of Yunnan region. There are a good correspondence relation between the distribution of geothermal field and those of hot springs and earthquakes.

Key words: Geothermal field, Terrestrial heat -flow, Geothermal gradient

摘要： 本文从实测26口井的地热数据中取得14个大地热流值,认为云南地区地热场具有西高东低,并自西往东呈波浪式逐渐变低的趋势,该区具有高地热特征的地质发展历史。由于该区地处世界两大地震带的过渡地区,具有岛弧型的高地热特征,也具有岛弧地带地震活跃的特点,强震多发生在深大断裂带上。该区不同构造单元中的地热场存在的明显不均一性,影响着地震的孕育和地震的发生,地热场、温泉和地震的分布呈良好的对应关系。

关键词: 地热场, 大地热流, 地温梯度