河南省驻马店-遂平地热田地球化学特征及指示意义

Geochemical Characteristics and Indicative Significance of Zhumadian-Suiping Geothermal Field in Henan Province

驻马店-遂平地热田位于驻马店-淮滨凹陷带西北隅。地热田土壤(第Ⅰ环境)汞(Hg)元素含量的空间分布规律与驻马店-息县大断裂、深部热能对流和地表地热异常显示密切相关。Na^(+)、Cl^(-)、SO^(2-)_(4)及溶解性总固体含量浓度中心与遂平断裂、驻马店-息县断裂和杨庄-王勿桥断裂交汇位置吻合程度高。其地球化学特征表明了上述断裂对本区地热资源的形成起着重要的控制作用。结合地热流体LMWL投影分布规律和地热流体14C年龄分析,本研究认为,大气降水是区内地热流体的主要来源,且地热流体补给来源于遂平、确山一带山前地带。

The Zhumadian-Suiping geothermal field is located in the northwest corner of the Zhumadian-Huaibin depression zone.The spatial distribution of mercury(Hg)element content in geothermal field soil(the first environment)is closely related to the Zhumadian-Xixian fault,deep thermal convection,and surface geothermal anomalies.The concentration centers of Na^(+)、Cl^(-)、SO^(2-)_(4)and total dissolved solids are in high agreement with the intersection of Suiping fault,Zhumadian-Xixian fault and Yangzhuang-Wangwuqiao fault.Its geochemical characteristics indicate that the above-mentioned faults play an important role in controlling the formation of geothermal resources in this area.Combining the LMWL projection distribution law of the geothermal fluid and the 14C age analysis of the geothermal fluid,this study believes that the atmospheric precipitation is the main source of the geothermal fluid in the area,and the replenishment of the geothermal fluid comes from the piedmont areas of Suiping and Queshan.