榆中盆地位于兰州—定西中新生代凹陷盆地的中部。为探求和寻找可供开发利用的地热资源 ,从 1999年春节开始 ,对榆中盆地地热形成机制进行了初步研究 ,5月开始进行地温、水化学的全面调查与实地测定。结果 ,发现地球水化学与地温场存在密切关系 ,并依此确定了地热异常区和深部断裂构造。其形态、空间分布特征与后来物探电测深成果和钻探成果基本一致。证实榆中盆地存在地热构造背景条件和深热源机制 ,为进一步的地热勘探和地热资源开发提供了可靠依据。 The Yuzhong Basin is located in the central part of Lanzhou-Dingxi Cenozoic depression basin. In order to explore and find the geothermal resources for development and utilization, from the Spring Festival in 1999, a preliminary study was made on the geothermal formation mechanism in the Yuzhong Basin. In May, a comprehensive survey of geothermal and water chemistry and field measurements were conducted. As a result, it is found that the geochemistry of the earth is closely related to the geothermal field, and geothermal anomalies and deep fault structures are thus determined. Its morphological and spatial distribution characteristics are basically the same as those of the geophysical prospecting results and drilling results. It is confirmed that there are geothermal tectonic setting conditions and deep heat source mechanism in the Yuzhong Basin, which provide a reliable basis for further geothermal exploration and geothermal resource development.