山西柳林泉域获得石膏溶解热量补给的化学热力学证据

During the 890 million years since Middle-late Proterozoic Jixian Period to Early Paleozoic Ordovician Period, the North China platform deposited 685 thousand square kilometers carbonate rocks. In hydrogeology, it forms a series of giant karst aquifer system. Meanwhile, these carbonate stratum is good geothermal reservoir , which contains 42 billion cubicmeters (Chen mo xiang, Wang jiyang, 1994) hydrotherthermal resources. On the study of heat source of hydrothermal resources , we found that the carbonate strata contains gypsum and gypsum karst breccia.When karst groundwater flow through these intercalary strata , there would exist a dissolution process which along with a process of heat release.And the heat release could become an important source of heat supply for karst groundwater. Take this as a logical starting point, this project intends to adopt the numerical simulation method, sulphur isotope geothermometer and chemical thermodynamics to calculate the heat exchange amount in this process at Liulin spring area in Shanxi. The result would typical reveal the supply significance of gypsum stratum release heat to karst groundwater which widely distributed at the Middle Ordovician Epoch in North China platform .

自中晚元古代蓟县纪开始至早古生代奥陶纪的8.90亿年间，华北地台沉积了68.5万平方公里的碳酸盐岩区。在水文地质上，它构成了一系列巨型的岩溶含水系统。与此同时这些岩溶含水层又是很好的地热储层，其中蕴含了420亿立方米水热型地热资源。在对这些水热型地热资源的热量来源进行研究时，我们发现碳酸盐岩地层所含的石膏及膏溶角砾岩夹层遇水溶解释热过程可能成为岩溶热水资源一个重要的热量来源。以此为逻辑起点，本项目拟采用数值模拟法、硫同位素地热温标法和化学热力学方法计算山西柳林泉域岩溶地下水在流经含膏盐地层发生的放热过程产生的热量交换量。从而揭示华北地台中奥陶统膏盐地层对岩溶热水的热量补给意义。