地学前缘 ›› 2020, Vol. 27 ›› Issue (1): 55-62.DOI: 10.13745/j.esf.sf.2019.12.4

• 地热资源评价与选区 • 上一篇    下一篇

广西干热岩地热资源赋存条件分析

康志强,张起钻,管彦武,刘德民,袁金福,杨志强,陆济璞,王新宇,张勤军,张美玲,冯民豪   

  1. 1. 表生地球化学教育部重点实验室; 南京大学 地球科学与工程学院, 江苏 南京 210093
    2. 中国东盟地学合作中心(南宁), 广西 南宁 530023
    3. 广西壮族自治区地质矿产勘查开发局, 广西 南宁 530023
    4. 吉林大学 地球探测科学与技术学院, 吉林 长春 130026
    5. 中国地质大学(武汉) 地球科学学院, 湖北 武汉 430074
    6. 广西壮族自治区地质调查院, 广西 南宁 530023
  • 收稿日期:2019-03-15 修回日期:2019-10-20 出版日期:2020-01-20 发布日期:2020-01-20
  • 作者简介:康志强(1982—),男,博士,高级工程师,水工环地质专业,主要从事岩溶水文地质及地热地质工作。E-mail:zqkang000@126.com
  • 基金资助:

    广西科技基地和人才专项项目(桂科AD17129052);广西地质矿产勘查开发局部门预算前期地质勘查项目“广西干热岩选区预测与分级评价”和“广西东部干热岩远景调查评价”

Analysis on the occurrence condition of geothermal resources of hot dry rock in Guangxi.

KANG Zhiqiang,ZHANG Qizuan,GUAN Yanwu,LIU Demin,YUAN Jinfu,YANG Zhiqiang,LU Jipu,WANG Xinyu,ZHANG Qinjun,ZHANG Meiling,ENG Minhao   

  1. 1. Key Laboratory of Surficial Geochemistry, Ministry of Education; School of Earth Sciences and Engineering, Nanjing University, Nanjing 210093, China
    2. ChinaASEAN Geosciences Cooperation Center (Nanning), Nanning 530023, China
    3. Guangxi Bureau of Geology & Mineral Prospecting & Exploitation, Nanning 530023, China
    4. College of Geoexploration Science and Technology, Jilin University, Changchun 130026, China
    5. School of Earth Sciences, China University of Geosciences (Wuhan), Wuhan 430074, China
    6. Guangxi Institute of Geological Survey, Nanning 530023, China
  • Received:2019-03-15 Revised:2019-10-20 Online:2020-01-20 Published:2020-01-20

摘要:

基于以往的认识,广西属于“缺煤、少油、乏气”的能源资源匮乏区,绝大部分能源靠进口或外省输送,能源结构极不合理。但是,广西地处亚欧板块、印度板块与太平洋板块的交接地带,地壳厚度较薄,断裂构造发育,岩浆岩大面积出露且放射性元素含量较高,具有较好的生热、储热条件。基于EGM2008全球超高阶地球重力场模型对广西地壳结构和深部界面重新计算,综合前期基础地质调查资料、元素地球化学资料、地热地质资料,对广西干热岩的成生条件和保存条件进行分析,认为北部湾盆地、玉林凹陷、郁江凹陷等构造单元具有干热岩成藏条件,可作为广西干热岩远景调查区进行下一步勘查。

关键词: 干热岩, 远景调查区, 大地热流值, 广西壮族自治区

Abstract:

Conventional wisdom has long regarded Guangxi as a resourcespoor region for its lack of coal, oil and gas resources. Indeed, Guangxi has an extremely unsustainable energy structure with most energy imported from other provinces or foreign countries. However, Guangxi is located at the intersections of the Eurasian, Indian and Pacific plates, thus has relatively thin crust, well developed fault system and large volcanic rock outcrops with high radioactive elemental content. In fact, southeast Guangxi has good heat generation and storage conditions. Based on the Earth Gravitational Model 2008 (EGM2008), we recalculated the crustal structure and crystalline basement interface in Guangxi using Parker-Oldenburg’s algorithm. We analyzed the conditions for dry hot rock formation by integrating previous basic geological survey and elemental geochemical and geothermal geological data. We concluded that dry hot rock formation conditions are met in the Beibu gulf Basin and Yulin and Yujiang Depressions. These areas can be used for hot dry rock prospective survey in the next exploration.

Key words: hot dry rock, prospective survey area, terrestrial heat flow, Guangxi Zhuang Autonomous Region

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