Research on the Fluid Inclusions of Shizishan Copper Deposit, Yunnan
详细信息
- 责任者：Li Qiang (Yunnan Land and Resources Vocational College ; Kunming 650217 ; China) ; Wang Lei
- 刊名：Geotectonica et Metallogenia
- 出版年：2013
- 卷期：37(1)
- 关键词：铜矿 ; copper ores ; 流体包裹体 ; fluid inclusions ; 云南 ; Yunnan Province
- 页码：p.57-64
- 图表：illus., 3 tables, 22 refs.
- 分类号：1001
- issnNo：ISSN1001-1552
- isbnNo：CN44-1595/P
摘要
This paper presents researches of the petrography, microthermometry, and composition of fluid inclusions of the Shizishan copper deposit. The results show that the ore fluid is H2O-NaCl system in this area. The fluid inclusions can be divided into three types, i.e., daughter mineral-bearing fluid inclusion (S-type), liquid fluid inclusion (W-type) and Vapor fluid inclusion (V-type). Most of the daughter mineral in S-type is halite, with vanishing temperature higher than homogenization temperature of vapor-liquid. Its homogenization temperature and salinity vary in ranges of 192 ℃ to 570 ℃ and 31.2% to 69.63 % NaCleqv, respectively, which suggest a deep sourced fluid. The homogenization temperature of W-type ranges from 98℃ to 583℃, and salinity is low to medium, from 3.55% to 22.98% NaCleqv. V-type inclusion is characterized by high-temperature (454 ℃ of homogenization temperature on average) and low-salinity (9.54 % NaCleqv on average). The coexistence of different phase ratios of all types′ fluid inclusions in high temperature stage, with similar homogenization temperature, indicated that the ore-forming fluid experienced boiling. Therefore, it is suggested that boiling is the main metallogenic mechanism. The genesis of this deposit belongs to sedimentary with deep resource hypothermal overprint.