河南范县地热资源地质特征及成矿机制分析  

Analysis of geological characteristics and metallogenic mechanism of geothermal resources of Fan County,Henan Province

作　　者：卢磊 倪昆 刘亚南 LU Lei;NI Kun;LIU Yanan(Henan Provincial Institute of Land and Space Survey and Planning,Zhengzhou 450053,Henan,China;Ecological Enviroment Geo-service Center of Henan Geological Bureau,Zhengzhou 450053,Henan,China)

机构地区：[1]河南省国土空间调查规划院,河南郑州450053 [2]河南省地质局生态环境地质服务中心,河南郑州450053

出　　处：《矿产与地质》2024年第6期1081-1094,共14页Mineral Resources and Geology

基　　金：河南省地勘基金项目“河南省地热资源地质工作成果集成与综合评价”(豫自然资发[2019]22号);“聊兰断裂(河南省范县段)地热资源预可行性勘查”(豫自然资发[2021]16号)共同资助。

摘　　要：河南范县地热资源区是河南省“十四五”地热资源找矿突破战略行动重要勘查区,具有分布面积广、水温高、涌水量和回灌率大等特点。通过对研究区地质背景和地热条件的分析研究,探求地热田的补给、径流和排泄途径,热储层地热流体赋存条件和成矿机理。结果表明:范县地热资源位于沉积盆地潜凸起型砂岩—岩溶二元热储地热田内;O—∈岩溶地热流体位于深循环—弱开放式环境;沉积盆地型地热田具有“四元”成矿机制分别为:一元为基底凸起区(隆起区),二元为构造影响带两侧,三元为新生界盖层(埋深1 200~1 500 m),四元为碳酸盐岩(灰岩、白云岩等)的基底。The geothermal resource area in Fan County,Henan Province is an important exploration area for the " 14th Five-Year Plan " geothermal resource prospecting breakthrough strategic action in Henan Province.This area is characterized by a wide distribution of high water temperature,large water inflow,and high recharge rate.Through the analysis of the geological background and geothermal conditions of the Fan County,the recharge,runoff and drainage paths of geothermal fields,the occurrence conditions and metallogenic mechanism of geothermal fluids in geothermal reservoirs were investigated.The results show that the geothermal resources of Fan County are located in the geothermal field of the buried-uplift sandstone-karst binary geothermal reservoir in the sedimentary basin.The O-∈karst geothermal fluid is located in a deep circulation-weak open environment.The sedimentary basin-type geothermal field has "four-elements" metallogenic mechanism:one is the basement uplift area( uplift area),the binary is on both sides of the structural influence zone,the ternary is the cover layer of Cenozoic with a buried depth of 1 200 to 1 500 m,and the quaternary is the basement lithology of carbonate rock( limestone,dolomite,etc.).

关 键 词：地热资源 沉积盆地 岩溶热储 地质特征 成矿机制 范县 河南 

分 类 号：P314[天文地球—固体地球物理学]