Earth Science Frontiers ›› 2020, Vol. 27 ›› Issue (1): 55-62.DOI: 10.13745/j.esf.sf.2019.12.4

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

KANG Zhiqiang1,2,3(), ZHANG Qizuan3, GUAN Yanwu4, LIU Demin5,*(), YUAN Jinfu3, YANG Zhiqiang3, LU Jipu3, WANG Xinyu3, ZHANG Qinjun6, ZHANG Meiling6, FENG Minhao6   

  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
  • Contact: LIU Demin

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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