| 王文希,冯嘉豪.安徽沙坪沟地区地温场分布特征及影响因素分析[J].矿产勘查,2026,17(6):1080-1089 |
| 安徽沙坪沟地区地温场分布特征及影响因素分析 |
| Analysis of geothermal field distribution characteristics and influencing factors in Shapinggou area, Anhui Province |
| 投稿时间：2024-10-15 |
| DOI：10.20008/j.kckc.202606013 |
| 中文关键词: 大地热流 岩石生热 地温场 沙坪沟矿区 |
| 英文关键词: heat flow heat generation temperature field Shapinggou ming area |
| 基金项目:本文受2023年度湖北省社科基金前期项目(23ZD220)资助。 |
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| 摘要点击次数: 3 |
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| 中文摘要: |
| 矿山地热是地热地质研究中重要的一部分，其主要包括煤田地热、油气地热及金属矿山地热等，同时，深部矿产和地热资源协同开采是资源可持续发展的重要举措，对矿山地温场分布特征研究有助于协助深部矿产资源的开采与利用。本文以 2口钻井测温曲线和 155块样品热物性资料为基础，分析了研究区地温场特征，并通过热模拟研究其温度场的影响因素。研究结果表明沙坪沟地区地层温度随深度线性增加，热量传输以热传导为主，地层温度在 1000 m埋深处为 41 ℃左右，对应的地温梯度值为 25.0 ℃/km左右，属于较低的地温梯度值范畴，地温梯度随深度表现出一定的随深度增加而增大的趋势；就热物性数据而言，区域岩石热导率为 1.92~4.31 W/(m.K)，均值为 3.14 W/(m.K)；岩石生热率值为 1.55~15.89 μW.m-3，均值为 5.36 μW.m-3；研究区沙坪沟其生热率均值为 6.17 μW.m-3左右，呈现出异常高的生热率值；经简单估算，该区大地热流值为 80.0 mW/m2左右，属于异常高热流值范畴，岩石异常高的生热率是造成区域异常高热流值的主要原因，由于区域岩浆活动发生最近时间为 100 Ma左右，时间久远，可认为岩浆活动对区域地温场没有影响。 |
| 英文摘要: |
| Mine geothermal resources constitute a significant part of geothermal geological research, encom-passing coalfield geothermal, oil and gas geothermal, and metallic mine geothermal systems. The coordinated exploi-tation of deep mineral and geothermal resources is a crucial measure for sustainable resource development. Investi-gating the distribution characteristics of the geothermal field in mining areas is essential for the extraction and utili-zation of deep mineral resources. Based on temperature logging data from two boreholes and thermal property mea-surements from 155 rock samples, this study analyzes the geothermal field characteristics of the study area and ex-plores the influencing factors of the temperature field through thermal modeling. The results indicate that in theShapinggou area, formation temperature increases linearly with depth, with heat conduction being the dominant heattransfer mechanism. At a depth of 1000 meters, the formation temperature is approximately 41 ℃, corresponding toa geothermal gradient of around 25.0 ℃/km, which falls into the category of relatively low geothermal gradients. Thegeothermal gradient also exhibits a slight increasing trend with depth. Regarding thermal properties, the thermalconductivity of regional rocks ranges from 1.92 to 4.31 W/(m.K), with an average of 3.14 W/(m.K). The radiogenicheat production rate varies between 1.55 and 15.89 μW.m-3, with an average of 5.36 μW.m-3. Specifically, in the Shapinggou area, the mean heat production rate is approximately 6.17 μW.m-3, indicating an anomalously high ra-diogenic heat production. A simple estimation suggests that the terrestrial heat flow in this area is about 80.0 mW/m2, classifying it as an abnormally high heat flow region. The exceptionally high radiogenic heat production of rocksis identified as the primary cause of the elevated regional heat flow. Given that the most recent magmatic activity inthe region occurred around 100 Ma, it is considered too ancient to have any significant impact on the current geo-thermal field. |
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