Metallogenic Model of Magma Conduit System of Jinchuan Cu-Ni Sulfide Deposit
详细信息
- 责任者：Zeng Renyu (School of Geosciences and Info-Physics ; Central South University ; Changsha 410083 ; China) ; Lai Jianqing
- 刊名：Mineral Resources and Geology
- 出版年：2013
- 卷期：27(4)
- 关键词：铜矿 ; copper ores ; 镍矿 ; nickel ores ; 四川 ; Sichuan Province
- 页码：p.276-282
- 图表：7 illus., 2 tables, 20 refs.
- 分类号：1001
- issnNo：ISSN1001-5663
- isbnNo：CN45-1174/TD
摘要
Jinchuan deposit is the third largest mining magmatic sulfide Ni-Cu deposit in the world.Its ore- forming process and emplacement mechanism have been debated since it discovered.Currently,Metallogenic system of magma conduit system has been increasingly accepted by geologists,because of the theory that o- pening magma conduit system provides ore-forming conditions,called"Small intrusions form large deposits".In this paper,Metallogenic model of magma conduit system of Jinchuan Cu-Ni sulfide deposit is discussed combined with previous research.Intrusion’s shape,macroscopic and geochemical characteristics of contact belts between igeous rock and wallrock,reflect that there is a normal fault system comprised of Detachment fault F1 and F2,etc.,before the ultrabasic pluton emplaced,Which is ore-controlling faults of Jinchuan de- posit,and the magma conduit interlinked with foot magma chamber.Summarizing the variation of Cu,Ni,platinum group grades in different ore bodies,and research on the line-6 copper(PGE)-rich orebody and NO.2 orebody line-33-41 extremely rich ore,show that the ore magma ofⅠ24,Ⅱ1 and Ⅱ2 orebody are formed by different magma conduits,respectively.Then we propose the possible output position of magma channel and summarize the mineralization model of this deposit.