鲁山县构造地热田地热水水化学特征及成因分析  

Hydrochemical Characteristics and Genetic Analysis of Geothermal Fluidin Tectonic Geothermal Field of Lushan County

作　　者：刘华平[1] 杨巍[1] 王吉平 曹自豪 Liu Huaping;Yang Wei;Wang Jiping;Cao Zihao(NO.5 Institute of Geo-Exploration of Henan)

机构地区：[1]河南省地质矿产勘查开发局第五地质勘查院,郑州市450001

出　　处：《勘察科学技术》2023年第6期47-53,共7页Site Investigation Science and Technology

基　　金：河南地矿科研(豫财预[2020]6号)。

摘　　要：鲁山县构造地热田,分布于车村-鲁山下汤断裂地热带,属典型的对流型地热系统。受东西向深大断裂影响,地热水以NE或NW向张性断裂为通道,溢出地表形成温泉,并构成5处小型地热田。该文以鲁山构造地热田为例,通过10a地热水水质动态监测和地球水文化学调查,研究地热水水化学组分变化,通过采集研究区地热水、地表水、浅层地下水、雨水,测试其同位素氘、氧-18、氚、碳-14含量,对其形成成因开展分析研究。结果表明,地热水沿车村-鲁山断裂破碎带,接受西部尧山一带的大气降水入渗补给,在地形和水头压差的作用下,沿着北东向阻水深断裂构造涌至地表,并混入浅层冷水,形成了中低温构造地热田。The tectonic geothermal fields in Lushan County distribute in the ChecunLushan Xiatang fault zone and belong to a typical convective geothermal system.Affected by the east-west deep faults,the geothermal water flows through NE or NW trending extensional faults,overflowing the surface to form hot springs and forming five small geothermal fields.This article takes the tectonic geothermal field in Lushan for example,and studies the changes in the chemical composition characteristics of geothermal water through 10 years of dynamic monitoring of geothermal water quality and geochemical investigation.By collecting geothermal water,surface water,shallow groundwater,and rainwater from the research area,testing the contents of isotopes deuterium,O-18,T and C-14,the formation causes of these isotopes are analyzed and studied.The resulte has shown that geothermal water of the fractured zone of the ChecunLushan fault is supplied by atmospheric precipitation infiltration in the western Yaoshan area.Under the influence of terrain and water head pressure difference,a moderately low temperature geothermal field is formed by flowing into the surface along northeast trending water resistance fault structures and mixing with shallow cold water.

关 键 词：构造地热田 地热水 水文地球化学 同位素 成因分析 

分 类 号：P314[天文地球—固体地球物理学]