| 江西芦溪县南部大地热流特征 |
| 投稿时间：2023-04-03 修订日期：2023-09-25 点此下载全文 |
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| 基金项目:中国地质调查局地质调查项目(编号: DD20221677-2)、中央财政基本科研业务费项目(编号: JKY202004)、江西省重点研发计划项目(编号: 20203BBG72W011)和江西省地质局科技研究项目(编号: 2021AA07)联合资助 |
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| 中文摘要:江西省芦溪县南部地区地热资源丰富,但地热地质研究程度较低,大地热流测量工作进行的较少,制约着区域地热资源勘查开发。本文以芦溪县南部的新泉和石溪为研究区,结合钻孔岩心热物性测试和地温测井等分析了研究区岩石热导率、地温场、热源机制的特征。研究区岩石热导率平均值在2.063-6.176W/m.K,热导率最高的为硅质石英岩,可作为良好的导热岩体。大地热流平均值为76.39mW/m2,远高于中国大陆地区的平均值62.5mW/m2,该地区具有较高的热背景值。花岗岩放射性生热率平均值为2.16μW/m3,不属于高产热型岩体,放射性生热对地表热流贡献较小,热源来源为地壳深部供热。研究区构造活动强烈,深大断裂和次级断裂发育,为地下热水的深部循环提供了良好的导热和导水通道。本研究可为武功山地区的地热资源开发提供重要启示。 |
| 中文关键词:武功山地区 大地热流 放射性生热率 热导率 地热资源 |
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| Characteristics of terrestrial heat flow in the south of Luxi County, Jiangxi Province |
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| Abstract:The southern area of Luxi County in Jiangxi Province is rich in geothermal resources. However, there is a notable deficiency in geothermal geological investigations in this area, and terrestrial heat flow measurements have been insufficient. This limitation hampers the comprehensive exploration and exploitation of the region's geothermal potential. This study focuses on the areas of Xinquan and Shixi in the southern part of Luxi County. By integrating data from borehole core thermal property tests and geothermal well temperature measurements, analyzes the characteristics of rock thermal conductivity, geothermal fields, and heat source mechanisms in the study area. The average rock thermal conductivity in the study area ranges from 2.063-6.176W/m.K. Notably, siliceous quartzite exhibited the highest thermal conductivity, qualifying it as an efficient thermal conductor. The average terrestrial heat flow is 76.39 mW/m2, which is much higher than the average value of 62.5 mW/m2 in mainland China, indicating that the area has a relatively high thermal background. The average radioactive heat production rate of granite is 2.16μW/m3, which is not classified as a high heat-producing rock. Radiogenic heat has a minor contribution to the surface heat flow, and the heat source comes from deep crustal heating. The study area is tectonically active, with the development of major and secondary faults, providing great thermal and water-conducting channels for the deep circulation of underground hot water. This study can provide important insights for the development of geothermal resources in the Wugong Mountain area. |
| keywords:Wugong Mountain area Terrestrial heat flow Radiogenic heat production rate Thermal conductivity Geothermal resources |
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