陕西镇安丘岭微细浸染型金矿床金矿化过程中元素活动规律

Regularities of element activities in gold-mineralizing process of the Qiuling micro-disseminated gold deposits in Zhen’an, Shannxi

1.
Xi'an Institute of Geology and Mineral Resources, Xi'an 710054, China;Department of Geology, Northwest University, Xi'an 710069, China
2.
Faculty of Earth Science, Chang'an University, Xi'an 710054, China

摘要: 通过对比丘岭矿区采于同一层位、同一岩性的岩石-矿石的地球化学组成,应用质量平衡方程对该微细浸染型金矿床不同的岩石类型在金矿化过程中元素活动规律的计算结果表明,不同类型的岩石在矿化前后元素的迁入或迁出状况不同、质量盈亏情况不同,碎屑岩岩石矿化后其质量增加,碳酸盐岩石矿化后质量发生亏损;金矿化发生时,含矿溶液为一富SiO₂、富K⁺的酸性溶液,且金矿化发生于较为还原性的环境。
- 元素迁移 /
- 微细浸染型金矿床 /
- 陕西丘岭
Abstract: Based on the element concentrations in rock and ore with identical lithology sampled in same strata,the calculation results of mass balance equation show that the transfer regular ities of element in different rock types in gold-mineral izing processes of Qiuling micro-disseminated gold deposits are dissimilar,and the mass of clastic rock are increased during the gold mineralization,while the carbonate rock suffers aloss of mass; the mineralizing fluids are acidic fluids enriched in SiO₂ and K⁺,and the gold mineralization occur in a reducing environment.
- element transfer /
- micro-disseminated gold deposits /
- Qiuling, Shannxi province