| 摘要: |
| 鲁中山区五级构造单元莱芜凹陷、东平凸起及新甫山凸起分布有热水资源。研究发现，不同构造位置热水埋深、热储类型及成因机制不尽相同。利用鲁中山区各构造单元典型地热井测温数据，热水与其他类型水体水化学组分、同位素对比分析结果，对地热地质特征、热水成因及热储温度值进行研究和计算。结果表明，大气降水为鲁中山区热水补给来源；区内热水水化学类型为SO4-Na·Ca型及SO4·R-Na·Ca型（R为Cl或HCO3）；较其他水体，地热水同位素δ18O和δD表现为贫化特征；各热储温度值低于100℃，属于中低温热储范畴，且热水均为未成熟水，表明地热水水－岩相互作用尚未达到离子平衡状态，溶解作用仍在进行，或热水受到了外源冷水的混合作用。位于盆地内部的冷家庄地热系统属于热传导型，盆缘凸起的安驾庄及桥沟地热系统属于热对流型。研究结果对鲁中山区地热水资源开发提供了理论依据。 |
| 关键词: 鲁中山区 地热 朱砂洞组 水化学特征 大地热流 |
| DOI： |
| 分类号:P64 |
| 基金项目:国家重点研发计划《典型地层空气潜孔钻进成井工艺》（编号：2018YFC1508703）、中国地质调查局项目《沂蒙山革命老区1：5万水文地质调查》（编号：DD20160289）、《太行山北段综合地质调查》（编号：DD20190259） |
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| Geothermal geological characteristics and genesis of hot water in the central mountain area of Shandong Province |
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LIU Yuanqing, ZHOU Le, Lü Lin, LI Wei, WANG Xinfeng, DENG Qijun, SONG Mian, ZHENG Yidi, MA Xuemei
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Center for Hydrogeology and Environmental Geology Survey, CGS, Baoding 071051, Hebei, China
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| Abstract: |
| There are hot water resources distributed in Laiwu Depression,Dongping Uplift and Xinfushan Uplift of the fifth grade structural unit in the central mountain area of Shandong Province.It is found that the burial depth of hot water,the type of thermal reservoir and the genetic mechanism are varied in different structural positions.Based on the temperature measurement data of typical geothermal wells,the hydrochemical composition and isotope comparative analysis of hot water with other types of water,the authors studied and calculated the geothermal geological characteristics,hot water genesis and thermal storage temperature value.The results show that the precipitation is the source of hot water supply.The chemical types of the hot water in this area are SO4-Na·Ca and SO4·R-Na·Ca(R standing for Cl or HCO3),with low δ 18O and δ D values compared with other waters.The calculated temperature value of each heat storage is lower than 100℃,suggesting a medium low temperature heat storage.The hot water is immature water,which indicates that the water rock interaction of geothermal water has not reached the ion equilibrium state,the dissolution is still in progress,or the hot water is mixed by exogenous cold water.The Lengjiazhuang geothermal system in the basin belongs to the heat conduction type,and the Anjiazhuang and Qiaogou geothermal systems in the basin margin uplifts belong to the thermal convection type.The research results provide a theoretical basis for the development of geothermal water resources in the central mountain area of Shandong Province. |
| Key words: the central mountain area of Shandong Province geotherm Zhushadong Formation hydrochemical characteristics terrestrial heat flow |
