Volume 30 Issue 5
Oct.  2024
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LIU J X，CAO L，GUO Z W，et al.，2024. Electrical characteristics and metallogenic prediction of Baishawo rare metal deposit in northeast Hunan Province[J]. Journal of Geomechanics，30（5）：768−780 doi: 10.12090/j.issn.1006-6616.2024060
Citation: LIU J X，CAO L，GUO Z W，et al.，2024. Electrical characteristics and metallogenic prediction of Baishawo rare metal deposit in northeast Hunan Province[J]. Journal of Geomechanics，30（5）：768−780 doi: 10.12090/j.issn.1006-6616.2024060
shu

Electrical characteristics and metallogenic prediction of Baishawo rare metal deposit in northeast Hunan Province

doi: 10.12090/j.issn.1006-6616.2024060
  • 1.

    School of Geosciences and Info-Physics, Central South University , Changsha 410083, Hunan, China

  • 2.

    Key Laboratory of Non-Ferrous Resources and Geological Hazard Detection, Central South University, Changsha 410083, Hunan, China

  • 3.

    Geology Survey Institute of Hunan Province , Changsha 410016, Hunan, China

Funds:  This research is financially supported by the National Natural Science Foundation of China (Grant No. 42130810), Provincial Natural Science of Foundation of Hunan (Grants No. 2023JJ60164, 2023JJ60166), Scientific Research Project of the Geological Bureau of Hunan Province, China (Grant No. HNGS202201), and Scientific Research Project of Leading Talents of the Geological Bureau of Hunan Province, China (Grant No. HNGSTP202318).
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  • Author Bio:

    柳建新，中南大学二级教授、博士生导师。2023年荣获第十八次李四光地质科学奖教师奖。现任中南大学地质调查研究院院长、中南大学地球科学与信息物理学院教授委员会主任、中南大学地质资源与地质工程一级学科带头人，兼职中国地球物理学会副理事长。坚守在地质地球物理科研教学一线，针对深部战略性金属资源勘探面临强电磁干扰问题，创立了“双频激电法+伪随机电磁法+三维可视化”的多尺度深部金属矿定位预测技术体系：提出了西部特殊地貌景观条件下双频激电法勘探方法技术体系；研发了“均匀广谱伪随机电磁法”勘探方法；研发了金属矿山深部隐伏矿定位预测理论与方法体系；研究成果有效缓解了紧缺矿产资源危机，为社会稳定和国家战略性金属资源安全做出了重大贡献。荣获国家技术发明二等奖1项（R2）、国家科技进步二等奖1项（R5）、国家科技进步三等奖1项（R8）、省部级一等奖7项及二等奖6项；出版专著25部，发表SCI论文115余篇，EI论文79篇；授权国家发明专利35项。荣获中华人民共和国建国70周年纪念章、湖南省首届优秀研究生导师、湖南省首届优秀科技工作者、中国地球物理学会首届最美科技工作者等多项荣誉。享受国务院政府特殊津贴

  • Received: 2024-05-29
  • Revised: 2024-09-01
  • Accepted: 2024-09-03
    • Available Online: 2024-09-04
  • Published: 2024-10-28
    Abstract
  •   Objective  The aim of this study is to characterize the deep electrical structure of the Baishawo pegmatite-type deposits, explore the spatial distribution of rare metal mineralization models and ore-conferring carriers, and elucidate the relationship between the location of ore veins to provide a basis for prediction in rare metal mineral exploration.   Methods  Through the controlled-source audio-geomagnetic method (CSAMT) and the conjugate gradient method of inverse measurement of three exploration profiles, deep hidden rock (ore) bodies were detected. Then, by combining these results with the information from drill holes and elemental geochemical anomalies, a comprehensive analysis was carried out to reveal the distribution of the hidden dikes and the mineralization characteristics.   Results  The study showed that the concealed pegmatite veins are mainly located in the Lengjiaxi Group, where they are concentrated on the top of the granite body and around tectonic fissures and have burial depths ranging from 50 to 300 m. The geophysical signature of pegmatite vein mineralization is a high-resistance vein-like geologic body intruded from a deep high-resistance body into a shallow low-resistance body.   Conclusion  The determined distribution and burial depth of concealed pegmatite veins, identified potential concealed veins in the study area, and geophysical characteristics of the pegmatite vein mineralization provide a basis for understanding the formation mechanism of fracture zone-constrained pegmatite veins. Significance The research results provide a scientific basis for follow-up exploration of the Baishawo deposit, reveal the formation mechanism of the pegmatite veins, and provide reliable physical exploration and prediction technology and experience useful for rare metal exploration in northeast Hunan and south China.

     

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