山西忻州盆地地热水地球化学特征及其成因机制
摘要
Studies on geothermal water geochemistry are of great significance for understanding the genesis of various hydrothermal resources.By taking the Xinzhou basin in Shanxi Province as a study area, this paper aims to identify the geochemical origin of the Xinzhou geothermal waters, to evaluate the mixing process between the geothermal waters and the shallow cold groundwaters, and to reveal the geological genesis of the Xinzhou geothermal system based on a systematic geochemical study conducted there.The formation of the Xinzhou geothermal system should have nothing to do with a shallow magma chamber or excessive decay heat of radioactive elements in shallow rocks.Instead, it occurred as a result of the deep groundwater circulation in a normal heat flow background.The atmospheric precipitation in the western Yunzhongshan recharge area infiltrated into the deep underground and migrated to the Xinzhou basin with circulation depths between 1 618.3 and 3 451.5 m.Correspondingly, the reservoir temperatures ranged from 48.4 to 91.8 °C.The geothermal waters were mixed 基金项目： 国家自然科学基金项目(No.