Some New Grasp of the Shuiyindong Gold Deposit in Guizhou Province
详细信息
- 责任者：Ren Tao (Faculty of Land and Resource Engineering ; Kunming University of Science and Technology ; Kunming 650093 ; China) ; Zhang Xingchun
- 刊名：Geology and Prospecting
- 出版年：2013
- 卷期：49(2)
- 关键词：卡林型金矿床 ; Carlin-type gold deposit ; 贵州 ; Guizhou Province
- 页码：p.217-223
- 图表：illus., 1 table, 27 refs.
- 分类号：1001
- issnNo：ISSN0495-5331
- isbnNo：CN11-2043/P
摘要
The Shuiyindong gold mine is one of the largest and richest Carlin-type deposit in the Yunnan-Guizhou-Guangxi "gold triangle" area, whose orebodies occur in the high-porosity bioclastic limestone of the Permian Longtan Fm.. Microscope observations see five kinds of pyrites: framboidal, fine-grained, coarse-grained, bioelastic and banding ones. The framboidal pyrite is of sedimentary genesis, little related with the gold mineralization. The fine-grained, bioclastic and banding pyrites are of hydrothermal genesis, while the coarse-grained pyrite is of sedimentary and hydrothermal genesis. The coarse-grained euhedral pyrite has a sedimentary-type core that is enclosed by the hydrothermal arsenic pyrite. The backscattered images show that the gold mainly occurs in the hydrothermal arsenic-rich pyrite. The distribution of pyrites and gold-bearing sulfide suggests that adsorption and electrochemical processes are the possible mechanism for the formation of the Carlin-type gold deposits.
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