| 黔西南水银洞爆破角砾岩筒与金元素超常富集 |
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| 关键词:fluid explosion breccia gold exceptional enrichment deep-source hydrothermal Shuiyindong gold ore deposit Guizhou Province |
| 基金项目:国家自然科学基金项目(编号: 41172075) |
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| 摘要: |
| Fluid Explosion Breccia Pipe and Gold Supernormal Enrichment in Shuiyindong Gold Ore Deposit, Southwest Guizhou Province |
| Shuiyindong gold ore deposit is known as a typical fine-grain disseminated gold deposit (Carlin-type gold deposit) in Dian–Qian–Gui area; however, its gold grade is evidently higher than that of the common Carlin-type gold deposit, and its orebody is closely related to fluid explosion breccia. The chief breccia pipe is of a vertical columnar occurrence, the fractural mineralized broken zones on both sides of the pipe form a trumpet shape upwards in the expanded metallogenetic space, and high-grade orebodies are distributed around the pipes. Field investigation and microscopic observation indicated that the composition of breccia was quite complex; its rubbles had good abrasion and showed a space-dependent relationship with high-grade gold deposits. The pipe breccias were rich in Au, REE, and siderophile transition elements including Ti, Cr, Ni, Co, V, Zr, and Hf, and were evidently different from the surrounding rocks, reflecting the features of fluid explosion breccia resulting from the rapid uplifting of deep resource fluid, that is, the breccia pipes are the upwelling path of gold metallogenetic fluid. The rubble comprising early breccia in the pipe was of 18′10–6 gold grade, likely from the explosion fragment of the deep gold orebody, revealing considerable gold prospects in the depths of the Shuiyindong gold ore deposit. |
| QIU Xiao-ping,LIU Shi-chuan,WEI Mi.2021.Fluid Explosion Breccia Pipe and Gold Supernormal Enrichment in Shuiyindong Gold Ore Deposit, Southwest Guizhou Province[J].Acta Geoscientica Sinica,42(6):849-858. |
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