红河断裂带温泉水文地球化学及构造活动特征研究  

A Study on Hydrogeochemistry and Tectonic Activity Features of Hot Springs in the Red River Fault Zone

作　　者：邵维晔 王云[1] 李其林[1] 番绍辉 SHAO Wei-ye;WANG Yun;LI Qi-lin;FAN Shao-hui(Earthquake Administration of Yunnan Province,Kunming 650224,China)

机构地区：[1]云南省地震局,昆明650224

出　　处：《矿物岩石地球化学通报》2022年第3期612-624,共13页Bulletin of Mineralogy, Petrology and Geochemistry

基　　金：云南省青年地震科学基金项目(2022K10);地震科技星火计划项目(XH20053Y);云南省地震局青年骨干传帮带培养项目(CQ3-2021006)。

摘　　要：为探究红河断裂带上水热活动与断裂、地震活动之间的关系,更好地开展地热与地震观测研究,本文对断裂带上40组温泉水进行了水化学组分分析,运用硅焓模型估算了温泉的热储温度和循环深度,获得了热储温度表达的地热场。结果表明,红河断裂带不同区段水文地球化学特性和地震(M≥5)活动性存在相关性,地震活动性强的北段以Na-HCO_(3)型水为主,地震活动性弱的南段以Na-HCO_(3)·SO_(4)型为主;北段和南段均表现为高地热异常和深循环特征。综合地质及地球物理观测结果分析认为,红河断裂带与几条大型断裂交汇区更利于温泉深循环和深部物质的释放,各段特殊构造环境及力学机制控制了地热场的出现,地热场的分布和高温异常是影响地震活动性的重要因素。In order to explore the relationship among the hydrothermal activity, faulting, and seismic activity in the Red River Fault Zone(RRFZ), and to better carry out the research of geothermal and seismic observations, in this paper, we have analyzed chemical compositions of water samples from 40 groups of hot springs in the fault zone, estimated the heat storage temperatures and circulation depths of hot springs by using the silicon enthalpy model, and then obtained the geothermal field expressed by the heat storage temperatures. The results show that there are obvious correlations between the hydrogeochemical characteristics and seismicity(M≥5) in different sections of the Red River Fault Zone. The Na-HCO_(3)type water is dominant for hot springs in the north section of the RRFZ with relatively strong seismicity, while the Na-HCO_(3)·SO_(4)type water is dominant for hot springs in the south section with relatively weak seismicity;though there are characteristics of the high geothermal anomaly and deep circulation in both the northern and southern sections of the RRFZ. Based on the comprehensive analysis of geological and geophysical observation results, it is considered that the intersection areas between the RRFZ and several other large faults are more conducive to the deep circulation of hot springs and the release of deep materials than other parts of the RRFZ. The special structural environments and mechanical mechanisms of different sections of the RRFZ could have constrained the occurrence of geothermal field, and the distribution of the geothermal fields and high temperature anomalies should be important factors affecting the seismic activities in the RRFZ.

关 键 词：红河断裂带 温泉水化学特征 热储温度 地热异常 地震 

分 类 号：P542.3[天文地球—构造地质学] P641.3[天文地球—地质学]