| 江西赣县大地热流特征与热源机制研究 |
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| 引用本文：闫晓雪,甘浩男,刘峰,廖煜钟,原若溪,魏帅超,张薇.2023.江西赣县大地热流特征与热源机制研究[J].地球学报,44(1):107-116. |
| DOI：10.3975/cagsb.2022.121602 |
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| 基金项目:国家重点研发项目“深部碳酸盐岩热储层天然构造及人工干预下综合评价技术”(编号: 2019YFB150410302);中国地质调查局地质调查项目“全国大地热流值测量与靶区优选”(编号: DD20190128) |
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| 中文摘要:江西省赣县区位于江西省南部、属于我国东南高热流区, 但赣县区内大地热流研究尚属空白, 制约了区域地热背景的综合认知和进一步研究评价。本次研究基于钻孔测温及岩心样品热导率测试数据, 通过分析校正得到赣县地区平均大地热流值为75.9 mW/m2, 高于我国大陆地区平均热流值, 反映了区域具有较高的热背景。通过放射性测试, 得到研究区花岗岩体放射性生热率平均为5.68 μW/m3, 属于高放射性岩体, 大面积分布的高产热花岗岩, 可为区域地热背景提供稳定的附加热源, 此外贯穿本区的深大断裂及其次生断裂给热水提供了深循环通道加热, 因此推测研究区地热资源的热源机制为“地下水深循环加热+高产热花岗岩体生热”的模式。 |
| 中文关键词:赣县 大地热流值 高产热花岗岩体 热源机制 |
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| Characteristics of Heat Flow and Heat Source Mechanisms in Ganxian, Jiangxi Province |
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| Abstract:Ganxian is located in the south of Jiangxi Province and belongs to the high heat flow area in southeast of China. The lack of research on heat flow restricts the comprehensive cognition and further research of regional geothermal background. Based on borehole temperature measurement and thermal conductivity data, the average terrestrial heat flow in the study area was 75.9 mW/m2, which is higher than the average terrestrial heat flow in mainland China, indicating that the study area has a strong geothermal influence. The granites in the study area had an average radiation heat generation rate of 5.68 μW/m3. A widespread distribution of high-yielding thermal granites provides a stable additional heat source for the geothermal background. Furthermore, the deep fault extending across the study area, as well as the secondary faults, allow for deep circulation of heated groundwater. Therefore, the heat source mechanism of geothermal resources in the study area could be defined as “depth circulatory heating + high-yield thermal granite radioactive heat”. |
| keywords:Ganxian terrestrial heat flows high-yielding thermal granite heat source mechanism |
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