Modes of Occurrence of Gold in Arsenopyrite from Miaolong Gold Deposit in Sandu, Guizhou Province
详细信息
- 责任者：Chen Cuihua (College of Earth Sciences ; Chengdu University of Technology ; Chengdu 610059 ; China) ; Zhang Yan
- 刊名：Mineral Deposits
- 出版年：2013
- 卷期：32(5)
- 关键词：金矿 ; gold ores ; 金矿物 ; gold minerals ; 赋存形式 ; presence modes ; 贵州 ; Guizhou Province
- 页码：p.932-940
- 图表：3 illus., 2 tables, 36 refs.
- 分类号：1001
- issnNo：ISSN0258-7106
- isbnNo：CN11-1965/P
摘要
The ore bodies of the Miaolong gold deposit are hosted in limestone intercalated with marlstone of Upper Cambrian Sandu Formation.The gold ore bodies are strictly controlled by Fault Fm1and Fault Fm14.The oreforming process of this deposit can be divided into 3 stages,i.e.,diagenetic stage,hydrothermal mineralization stage and supergene oxidation stage.Arsenopyrite is one of the essential products of the hydrothermal mineralization stage and occurs as rhombic,acicular,columnar and radiate-columnar aggregates.The components of arenopyrite(FeAs0.80S1.17~FeAs1.02S1.21)are deviated obviously from the theoretical arsenopyrite components(FeAs1.12S1-x≤ 0.13)and show epithermal characteristics of enrichment of S and depletion of As. The asenopyrite is rich in gold,and the content of gold is 0.05%~0.14%,with an average of 0.06%.Au is uniformly distributed in the SEM diagram,suggesting that Au exists in the arsenopyrite in the form of lattice gold(solid solution gold).
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