- 责任者：Kang Yalong (School of Geosciences and Info-Physics ; Central South University ; Changsha 410083 ; China) ; Liu Jishun
- 刊名：Northwestern Geology
- 出版年：2013
- 卷期：46(3)
- 关键词：铜矿 ; copper ores ; 金矿 ; gold ores ; 流体包裹体 ; fluid inclusions ; 青海 ; Qinghai Province
- 页码：p.98-108
- 图表：6 illus., 1 table, 19 refs.
- 分类号：1001
- issnNo：ISSN1009-6248
- isbnNo：CN61-1149/P
Dehelongwa copper-gold deposit is a typical porphyry-type copper-gold deposit in the west Qinling mineralization belt, occurring mainly in fracture zone. Studies on quartz fluid inclusions show three main types of inclusions, namely H2 O-rich, COe-rich and saline daughter mineral inclusions. Microthermometry data suggests that prior to mineralization, the inclusion is powerful intrusion magmatic fluid, rich in Na＋ , K＋ and so on. In the metallogenic period, the inclusion is NaC1 unsaturated magmatie fluid of high temperature and high salinity, with a boiling feature. After mineralizaion, the inclusion is a HzO-NaC1-KC1 system with moderate temperature, medium-low salinity and low density. The study shows that the ore-forming of copper and gold is mainly caused by the changes in temperature, salinity and pressure, the open formation, the increasing oxygen fugacity, and the declining fluid pH value.