内黄凸起河南段地热田水文地球化学特征及其成因  

Hydrogeochemical Characteristics and Genesis of Geothermal Fields in theHenan Section of the Neihuang Uplift

作　　者：辛浩 宁艺武 平建华[2,3,5] 冷伟 陈高凯 赵继昌 XIN Hao;NING Yi-wu;PING Jian-hua;LENG Wei;CHEN Gao-kai;ZHAO Ji-chang(School of Water Conservancy and Transportation,Zhengzhou University,Zhengzhou 450000,China;Geothermal and Ecological Geological Research Center,Zhengzhou University,Zhengzhou 450000,China;Henan Province Geothermal Comprehensive Utilization Engineering Research Center,Zhengzhou 450000,China;MCL Electronic Materials Co.,Ltd.,Luoyang 471000,China;School of Ecology and Environment,Zhengzhou University,Zhengzhou 450000,China;Wangjiang New Energy Co.,Ltd.,Zhengzhou 450000,China;China Institute of Geo-Environmental Monitoring,Beijing 100081,China)

机构地区：[1]郑州大学水利与交通学院,郑州450000 [2]郑州大学地热与生态地质研究中心,郑州450000 [3]河南省地热综合利用工程研究中心,郑州450000 [4]麦斯克电子材料股份有限公司,洛阳471000 [5]郑州大学生态与环境学院,郑州450000 [6]万江新能源股份有限公司,郑州450000 [7]中国地质环境监测院,北京100081

出　　处：《科学技术与工程》2024年第34期14537-14550,共14页Science Technology and Engineering

基　　金：郑州大学高层次人才基金(135-32340122);郑州大学院士团队科研启动基金(134-32340364,134-32340370)。

摘　　要：内黄凸起河南段地热资源蕴藏丰富,地温梯度相对较高。然而,目前对内黄凸起河南段地热的运移机制尚未有深入研究。采用水文地球化学、热储温度计算、氢氧同位素等方法,对地热水的水化学类型、水化学演化、热储温度及深层热水补给来源等特征进行了分析。结果显示:研究区新近系热储水化学类型以Cl-Na为主,古近系热储主要为Cl-Na和Cl·SO_(4)-Na型。地热水中Na^(+)、Cl^(-)主要来源于矿物的溶解,同时钠硅酸盐矿物的溶解以及阳离子交替吸附作用也是地热水中部分Na^(+)的来源。碳酸盐、硫酸盐和硅酸盐矿物的沉淀溶解平衡共同影响Ca^(2+)、Mg^(2+)离子含量。研究区地热水主要补给来源为大气降水,地热水的补给高程在789~1417 m。大多数地热水出现δ^(18)O漂移特征,水岩作用相对强烈。研究区主要热储温度在45~53℃,地热水的循环深度在947~2070 m。冷水混入比例为55.3%~66.5%,在冷水混入之前的热储温度为78.05~102.9℃。探究了内黄凸起河南段热储温度、地热水补给来源及循环深度等地热信息,对研究区地热成因机制建立了系统性认识。The Henan section of the Neihuang Uplift is rich in geothermal resources,with relatively high temperature gradients.However,there has been limited research on the transport mechanism of geothermal fluids in this area.Hydrogeochemical methods,temperature calculations of geothermal reservoirs,and hydrogen-oxygen isotope techniques were utilized to analyze the hydrochemical types,hydrochemical evolution,reservoir temperatures,and deep hot water recharge sources of geothermal waters.The results show as follows.The hydrochemical types of the Neogene geothermal reservoirs are predominantly Cl^(-)Na,while those of the Eogene geothermal reservoirs are mainly Cl^(-)Na and Cl·SO_(4)-Na types.The Na^(+)and Cl^(-)in geothermal waters primarily originate from the dissolution of minerals,while the dissolution of sodium silicate minerals and the cation exchange adsorption also contribute to the source of some Na^(+)in geothermal waters.The precipitation-dissolution equilibrium of carbonate,sulfate,and silicate minerals collectively influences the concentrations of Ca^(2+)and Mg^(2+).The primary source of replenishment for geothermal waters is atmospheric precipitation,with the replenishment elevation ranging from 789 to 1,417 meters.Most geothermal waters exhibitδ^(18)O shift characteristics,indicating relatively intense water-rock interactions.The main geothermal reservoir temperature ranges from 45℃to 53℃,and the circulation depth of geothermal water is between 947 and 2070 meters.The proportion of cold water mixing is 55.3%to 66.5%,and the geothermal reservoir temperature before the cold water mixing is 78.05℃to 102.9℃.The geothermal information,including reservoir temperature,sources of geothermal water replenishment,and circulation depth,in the Henan segment of the Neihuang Uplift has been explored,leading to a systematic understanding of the geothermal genesis mechanism in the area.

关 键 词：地热成因 内黄凸起 水文地球化学 同位素技术 概念模型 

分 类 号：P314.3[天文地球—固体地球物理学]