临沂市温泉（井）成热机制分析及找热方向研究

Analysis on Heat Forming Mechanism and Study on Heat Finding Direction of Hot Springs (Wells) in Linyi City

摘要:

临沂市地处鲁西隆起南部，地热资源丰富。该文介绍了临沂市的地层、岩浆岩、构造、地热背景、主要控热断裂及20余眼温泉（井）的情况和分布。通过分析汤头温泉、白塔地热井、汤坊崖地热井、铜井地热井、松山地热井、新村地热井、西高都地热井等主要温泉（井）的控热断裂、成热机制，认为该区地热主要分布在沂沭断裂带与NW向深大断裂交会处，地下水补给多沿NW—SE断裂，热源以深大断裂沟通深部热源，水温、水量较好地热井均处在沂沭断裂带沂水汤头断裂以西的、控热断裂为张性断裂或的张扭性断裂凹陷区内。结合临沂市区域地质构造特点，认为蒙山断裂与鄌郚葛沟断裂深部交会处，尼山断裂、峄城断裂与鄌郚葛沟断裂交会处为地热勘探靶区。

Abstract:

Linyi city is located in the south of Luxi uplift with abundant geothermal resources. In this paper, the strata, magmatic rocks and structures, geothermal background and main thermal controlling faults, present situation and distribution of more than 20 hot springs (wells) in Linyi city have been introduced. Through analysis on heat control fracture and thermal mechanism of main hot springs (wells) , such as Tangtou hot springs, Baita geothermal well, Tangfangya geothermal well, Tongjing geothermal well, Songshan geothermal well, Xincun geothermal well and Xigaodu geothermal well, it is regarded that geothermal in this area mainly distributes at the junction of Yishu fault zone and the deep faults with the trend of NW. Groundwater recharge is mostly along the the fault with the trend of NW—SE, and the heat source communicates deep heat source and water temperature with deep fault. The geothermal wells with good water quantity are located in the west of Yishui-Tangtou fault in Yishu fault zone, and the controlled thermal faults are tensional or tensional fault sag. On the basis of analyzing the characteristics of regional geological structures in Linyi city, it is regarded that the deep intersection part of Mengshan fault and Tangwu-Gegou fault, and the intersection part of Nishan fault and Yicheng fault and Tangwu-Gegou fault are target areas for geothermic exploration.