| 江西芦溪县南部大地热流特征 |
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| 引用本文：张浩然,刘凯,张垚垚,孙文洁,王书训.2024.江西芦溪县南部大地热流特征[J].地球学报,45(1):25-37. |
| DOI：10.3975/cagsb.2023.101001 |
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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);江西省地质局科技研究项目(编号: 2021AA07) |
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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为 2.063~6.176 W/(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 76.39 mW/m2, 远高于中国大陆地区的平均值62.5 mW/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2.16 μW/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 region of Luxi County in Jiangxi Province is rich in geothermal resources. However, geothermal geological investigations in this area are lacking, and terrestrial heat flow measurements remain scarce. This lack of information hinders a thorough exploration and utilization of the local geothermal potential. This study focuses on the Xinquan and Shixi zones in the southern sector of Luxi County. By merging data from borehole core thermal property tests with geothermal well temperature recordings, the rock thermal conductivity, geothermal fields, and heat source dynamics are examined in the selected areas. The average rock thermal conductivity in the focus areas spans from 2.063 to 6.176 W/(m·K). Notably, siliceous quartzite demonstrates peak thermal conductivity, making it an optimal thermal conductor. The mean terrestrial heat flow was found to be 76.39 mW/m2, a figure that surpasses the mainland China average of 62.5 mW/m2, suggesting a relatively heightened thermal backdrop in the zone. The granite’s average radioactive heat production rate is 2.16 μW/m3, which excludes it from the category of high heat-producing stones. Radiogenic heat offers a nominal contribution to the surface heat flow, with the predominant heat source stemming from profound crustal heating. The researched region is geologically active, marked by primary and subsidiary fault lines that serve as robust thermal and water transmission routes for the deep circulation of subterranean hot water. The findings from this study can offer valuable perspectives for harnessing the geothermal resources in the Wugongshan area. |
| keywords:Wugongshan area terrestrial heat flow radiogenic heat production rate thermal conductivity geothermal resources |
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