甘肃省地温场特征及地热资源分布类型

CHARACTERISTICS OF GEOTHERMAL FIELD AND DISTRIBUTION TYPES OF GEOTHERMAL RESOURCE IN GANSU PROVINCE

甘肃省地温场分布具有造山带高于挤压造山型盆地的特征,地温场分布与构造活动性密切相关。地热资源分布可分为隆起断裂型和沉降盆地型两类,隆起断裂型地热资源分布在北山、祁连山、西秦岭3条造山带和纵贯秦祁的SN向构造带。沉降盆地型分布在安西—敦煌盆地、河西走廊盆地群、陇西盆地群和陇东盆地等4个盆地中。SN向构造带是甘肃省地热资源目前开发最多地段。

Distribution of geothermal field in Gansu Province has the characteristics which the geothermal flux values of orogenic belts are higher than values of compressional orogenic basin, and it is closely related with tectonic activities. The distribution of geothermal resource has been grouped into 2 types as lifted fault type and sedimentary basin type. Geothermal resource of lifted fault type occur in such 3 orogenic belts as Beishan, Qil- ianshan mountain and west Qinling, as well as within the south-north tectonic belt across Qinling and Qiliang mountain, resource of sedimentary basin type in such 4 basins as Anxi-Dunhuang Basin, Hexi Corridor Basin Group, Longxi Basin Group and Longdong Basin. The most development of geothermal resource is in the south- north tectonic belts at present.