黔东南寒武系沉积型重晶石矿床成矿规律与找矿预测
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本文为国家自然科学基金资助项目(编号:42163006, 42462008)、贵州省科技计划项目(编号:黔科合人才CXTD\[2025\]014、黔科合支撑\[2024\]一般128)和贵州重晶石找矿预测与评价科技创新人才团队(编号:黔地矿科合\[2024\]TD02号) 的成果


Metallogeny and prospecting prediction of Cambrian sedimentary barite deposits in Southeasten Guizhou
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  • 1) 贵州大学资源与环境工程学院, 贵阳, 550025; 2) 贵州大学喀斯特地质资源与环境教育部重点实验室, 贵阳, 550025    
  • 3) 贵州省地质矿产勘查开发局一〇一地质大队, 贵州凯里, 556000    
  • 4) 贵州省土地矿产资源储备局, 贵阳, 550004    
  • 3) 贵州省地质矿产勘查开发局一〇一地质大队, 贵州凯里, 556000    
  • 1) 贵州大学资源与环境工程学院, 贵阳, 550025; 2) 贵州大学喀斯特地质资源与环境教育部重点实验室, 贵阳, 550025    
  • 1) 贵州大学资源与环境工程学院, 贵阳, 550025; 2) 贵州大学喀斯特地质资源与环境教育部重点实验室, 贵阳, 550025    
  • 5) 贵州省地质矿产勘查开发局一〇三地质大队, 贵州铜仁, 554300    
  • 3) 贵州省地质矿产勘查开发局一〇一地质大队, 贵州凯里, 556000    
  • 1) 贵州大学资源与环境工程学院, 贵阳, 550025; 2) 贵州大学喀斯特地质资源与环境教育部重点实验室, 贵阳, 550025    
  • 3) 贵州省地质矿产勘查开发局一〇一地质大队, 贵州凯里, 556000    
  • 3) 贵州省地质矿产勘查开发局一〇一地质大队, 贵州凯里, 556000    
  • 3) 贵州省地质矿产勘查开发局一〇一地质大队, 贵州凯里, 556000    
  • 3) 贵州省地质矿产勘查开发局一〇一地质大队, 贵州凯里, 556000    
  • 1) College of Resources and Environmental Engineering, GuizhouUniversity, Guiyang, 550025;2) Key Laboratory of Karst Georesources and Environment, Ministry of Education, Guizhou University, Guiyang 550025    
  • 3) No. 101 Geological Party, Bureau of Geology and Mineral Exploration and Development of Guizhou Province, Kaili, Guizhou, 556000    
  • 4) Bureau of Land and Mineral Resources Reserve of Guizhou, Guiyang, 550004    
  • 3) No. 101 Geological Party, Bureau of Geology and Mineral Exploration and Development of Guizhou Province, Kaili, Guizhou, 556000    
  • 1) College of Resources and Environmental Engineering, GuizhouUniversity, Guiyang, 550025;2) Key Laboratory of Karst Georesources and Environment, Ministry of Education, Guizhou University, Guiyang 550025    
  • 1) College of Resources and Environmental Engineering, GuizhouUniversity, Guiyang, 550025;2) Key Laboratory of Karst Georesources and Environment, Ministry of Education, Guizhou University, Guiyang 550025    
  • 5) No. 103 Geological Party, Bureau of Geology and Mineral Exploration and Development of Guizhou Province, Tongren, Guizhou, 554300    
  • 3) No. 101 Geological Party, Bureau of Geology and Mineral Exploration and Development of Guizhou Province, Kaili, Guizhou, 556000    
  • 1) College of Resources and Environmental Engineering, GuizhouUniversity, Guiyang, 550025;2) Key Laboratory of Karst Georesources and Environment, Ministry of Education, Guizhou University, Guiyang 550025    
  • 3) No. 101 Geological Party, Bureau of Geology and Mineral Exploration and Development of Guizhou Province, Kaili, Guizhou, 556000    
  • 3) No. 101 Geological Party, Bureau of Geology and Mineral Exploration and Development of Guizhou Province, Kaili, Guizhou, 556000    
  • 3) No. 101 Geological Party, Bureau of Geology and Mineral Exploration and Development of Guizhou Province, Kaili, Guizhou, 556000    
  • 3) No. 101 Geological Party, Bureau of Geology and Mineral Exploration and Development of Guizhou Province, Kaili, Guizhou, 556000    
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    摘要:

    早寒武世重晶石爆发式成矿,并在贵州东南部形成了以大河边重晶石矿床为代表的一系列大型、超大型矿床,其与湖南贡溪寒武系重晶石矿带相连,构成我国江南重晶石成矿带的重要组成部分,也是我国重晶石资源最为集中的地区,目前已累计提交重晶石资源储量约0.24 Gt,在全球极具代表性。黔东南寒武系重晶石矿床具有点多、面广、资源高度集中的特点,其中大河边—贡溪是重晶石最为富集的区域,向西依次发育美郎—亚进重晶石富集区和老文溪—丙溪重晶石富集区。三大富集区内的重晶石矿床在矿床规模、沉积序列、矿石结构构造特征及元素/同位素组成方面存在差异,原因可能与控矿裂谷盆地内成矿物质差异性供给、海水化学性质、生物作用等因素有关。发现重晶石矿体厚度与底板硅质岩厚度呈此消彼长的关系,重晶石多产于硅质岩厚度0~10 m区域内,当硅质岩厚度大于20 m时重晶石矿体很薄甚至尖灭。通过实施新一轮找矿工作,在坪地断层(F1)下盘隐伏区域率先揭露工业重晶石矿体,结合外围找矿调查进展,提出应首先重点加强F1断层下盘找矿,有序推进已有重晶石富集区外围找矿,适时探索利用不同矿床空间关系进行找矿的工作思路。其中坪地断层(F1)下盘重晶石找矿潜力很大,有望在大型甚至超大型重晶石找矿方面取得新突破。

    Abstract:

    The Early Cambrian witnessed an explosive mineralization event of barite, forming a series of large to super- large deposits in southeastern Guizhou, China, for example, the Dahebian barite deposit. These deposits, together with the Cambrian barite metallogenic belt at Gongxi, Hunan Province, collectively constituting a crucial component of the Jiangnan barite metallogenic belt which is the most concentrated barite resource region in China, with cumulative barite reserves of approximately 240 million tonnes, demonstrating global representativeness. This paper collected and repeatedly sorted out a large amount of geological data, according to which the geological characteristics, spatiotemporal distribution, metallogenic geological conditions and ore- controlling factors were comprehensively analyzed, the metallogenic regularity were summarized, and prospecting direction were proposed.Methods:Based on recent exploration progress and metallogenic studies, this paper systematically summarized the distribution characteristics and the metallogenic regularity of the Cambrian barite deposits in southeastern Guizhou province. It also further identifies regional exploration directions.Result:The Cambrian barite deposits in southeastern Guizhou exhibit widespread distribution, high resource concentration, and clustered occurrences. The three most prolific barite enrichment zones are: 1) Dahebian—Gongxi (the primary enrichment zone), 2) Meilang—Yajin, and 3) Laowenxi—Bingxi. Systematic comparisons have revealed distinct differences among these zones in deposit scale, sedimentary sequences, ore textures/structures, and elemental/isotopic compositions, likely attributable to differential material supply paleo- seawater chemistry, and microbial activities in ore- controlling rift basins. Notably, an negative correlation exists between the thickness of barite orebody and underlying chert: Specifically, economic barite mineralization developes well where the thickness of the chert are 0~10 m, but becomes thin or pinch- out where the chert exceed 20 m.Conclusion: Recent exploration breakthroughs at the concealed footwall of the Pingdi Fault (F1), where industrial- grade orebodies were first intersected, combined with the progress of peripheral survey, propose a prioritized exploration strategy: 1) priority targeting of the F1 footwall for large to super- large barite deposits, 2) systematic expansion of prospecting in known enrichment zones, and 3) innovative exploration leveraging spatial relationships between deposits. The F1 footwall exhibits exceptional potential, with high prospects for yielding breakthroughs in identifying large to super- large barite deposits.

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高军波,李永刚,李士彬,何善立,杨瑞东,付勇,谢兴友,刘灵,李鑫正,罗邦良,王文杰,饶红娟,杨贵龙.2025.黔东南寒武系沉积型重晶石矿床成矿规律与找矿预测[J].地质论评,70(2):2025020010,[DOI].
GAO Junbo, LI Yonggang, LI Shibin, HE Shanli, YANG Ruidong, FU Yong, XIE Xingyou, LIU Ling, LI Xinzheng, LUO Bangliang, WANG Wenjie, RAO Hongjuan, YANG Guilong.2025. Metallogeny and prospecting prediction of Cambrian sedimentary barite deposits in Southeasten Guizhou[J]. Geological Review,70(2):2025020010.

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  • 收稿日期:2025-03-25
  • 最后修改日期:2025-04-07
  • 在线发布日期: 2024-03-20
  • 出版日期: 2024-03-15