| 基于水化学的沂源盆地地热田成热模式探讨 |
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| 引用本文： | 薄本玉,王韶霞,马鹏飞,叶倩,谭肖波,谢峰.基于水化学的沂源盆地地热田成热模式探讨[J].山东国土资源,2022,38(7). |
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| 作者姓名： | 薄本玉 王韶霞 马鹏飞 叶倩 谭肖波 谢峰 |
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| 作者单位： | 山东省地质矿产勘查开发局八〇一水文地质工程地质大队（山东省地矿工程勘察院）,山东省地下水环境保护与修复工程技术研究中心;淄博市自然资源和规划局地质矿产技术中心 |
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| 摘 要： | 沂源盆地地热田为低温水热型岩溶热储地热系统，盖层为古近系、白垩系、石炭系，热储层为寒武纪、奥陶纪碳酸盐岩，区内发育的深大断裂如上五井断裂、韩旺断裂、傅家庄断裂等为沟通深部热源的良好通道。为掌握地热田热水的补给来源、热源、地热水年龄，进一步分析其形成机理，采集地热水样品进行了地热水水文地球化学分析、气体及其同位素分析。结果表明，该地热田地热水水化学类型为HCO3·Cl·SO4Na·Ca型、HCO3Ca·Mg型，矿化度小于1g/L；地热水补给来源为大气降水，具深循环特征；热源以壳源为主；地热水年龄10.51ka B.P.，为古地下水。结合地下水循环机理，将其地热水形成机理总结为小型断陷盆地深循环承压型。
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| 关 键 词： | 地热田 水化学类型 形成机理 成热模式 沂源盆地 |
Study on Thermal Model of Geothermal Field in Yiyuan Basin Based on Hydrochemistry |
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| BO Benyu,WANG Shaoxi,MA Pengfei,YE Qian,TAN Xiaobo,XIE Feng.Study on Thermal Model of Geothermal Field in Yiyuan Basin Based on Hydrochemistry[J].Land and Resources in SHANDONG Province,2022,38(7). |
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| Authors: | BO Benyu WANG Shaoxi MA Pengfei YE Qian TAN Xiaobo XIE Feng |
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| Abstract: | The geothermal field in Yiyuan basin is a lowtemperature hydrothermal karst thermal reservoir geothermal system. The caprock is Paleogene, Cretaceous and Carboniferous. The thermal reservoir is Cambrian and Ordovician carbonate rocks. The deep and large faults developed in the area, such as Wujing fault, Hanwang fault and Fujiazhuang fault are good channels for communicating deep heat sources. In order to master the supply source, heat source and age of geothermal water in geothermal field, and further analyze its formation mechanism, geothermal water samples have been collected for geothermal water hydrogeochemical analysis, gas and isotope analysis. It is showed that hydrochemical types of geothermal field are HCO3·Cl·SO4Na·Ca type and HCO3Ca·Mg type, and the mineralization degree is less than 1g/L. The recharge source of geothermal water is atmospheric precipitation, which has the characteristics of deep circulation. The heat source is mainly shell source. Geothermal water age is 10.51B P. Ka, and belongs to ancient groundwater. Combining with groundwater circulation mechanism, the formation mechanism of geothermal water has been summarized as the deep circulation pressure type of small faulted basin. |
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| Keywords: | Geothermal field hydrochemical type formation mechanism heating mode Yiyuan basin |
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