泰安市桃花峪地区地热水化学特征及成因分析  

Hydrochemical Characteristics and Origin Analysis of Geothermal Water in Taohuayu Area of Tai’an City

作　　者：崔庆岗 吴树明 来永伟 杜小亮 CUI Qinggang;WU Shuming;LAI Yongwei;DU Xiaoliang(Shandong Geological Prospecting Institute of China Chemical Geology and Mine Bureau,Tai’an,Shandong 271000;Geological Exploration Institute,First Exploration Bureau of CNACG,Handan,Hebei 056004)

机构地区：[1]中化地质矿山总局山东地质勘查院,山东泰安271000 [2]中国煤炭地质总局第一勘探局地质勘查院,河北邯郸056004

出　　处：《中国煤炭地质》2024年第11期35-42,9,共9页Coal Geology of China

基　　金：山东省泰安市自然资源和规划局地质勘查项目(SDGP370900201902000298-03),(LRZBTA2015-058-4),(SDGP370900202102000047)。

摘　　要：桃花峪地热田位于泰山西南麓,属带状储热型低温地热资源。该地热田断裂发育,由EW向、NW向断裂构成控制断层体系,F1断裂为主导热断层,是地热水形成、流动、沟通、混合的通道。文章深入剖析了地热水的主量元素、微量元素、放射性226Ra、222Rn组分及同位素δ2H、δ18O、δ3H等特征,对地热水补给情况、生成年代、产生原因、成矿机制进行了探讨。桃花峪地热水含有丰富的氟、偏硅酸、氡等元素,水化学类型为SO4-Na•Ca,达到偏硅酸矿水浓度、氡泉矿水浓度,可提供独特的治疗功效。桃花峪地热田处于一个相对封闭的状态,主控要素为蒸发-结晶作用,补给主要来源于大气降水和北部山区基岩裂隙水,补给源高程+1163.33~+1263.33m,为次现代至1952年以来的水补给的混合水,且以古水成分居多,玉髓温标推断热储层温度为94.11~98.07℃,循环深度1191.44~1268.56m,深部热储仍有升温空间,地热能开发利用的前景广阔。Taohuayu geothermal field,located at the southwest foot of Mount Taishan Mountain,is a belt type low-temperature geothermal resource.The geothermal field is characterized by well-developed faults,consisting of EW and NW.The F1 fault is the dominant thermal fault and serves as a pathway for the formation,flow,connection,and mixing of geothermal water.The article provides an in-depth analysis of the major and trace elements,radioactive 226Ra,222Rn components,and isotopes of geothermal waterδ2H,δ18O,δ3H.The supply of geothermal water,generation age,causes,and mineralization mechanism were discussed.Taohuayu geothermal water contains rich elements such as fluorine,metasilicic acid,and radon.The hydrochemical type is SO4-Na•Ca,which reaches the concentration of metasilicic acid mineral water and radon spring mineral water,providing unique therapeutic effects.The Taohuayu geothermal field is in a relatively closed state,with the main controlling element being evaporation crystallization.The supply mainly comes from atmospheric precipitation and bedrock fissure water in the northern mountainous areas.The supply source is at an elevation of+1163.33 to+1263.33 meters,which is a mixed water supply from sub modern to 1952,and is mainly composed of ancient water.The temperature of the thermal reservoir is estimated to be 94.11 to 98.07℃according to the chalcedony geothermometers,with a circulation depth of 1191.44 to 1268.56 meters.There is still room for heating in the deep thermal storage,and the prospects for geothermal energy development and utilization are broad.

关 键 词：地热资源 地热地质特征 成因分析 桃花峪地热田 

分 类 号：P641.3[天文地球—地质矿产勘探]