西北地质2012，Vol.45Issue(1)：184-191,8.
青海双朋西金铜矿床成矿模式研究
Research on Metallogenic Model of Shuangpengxi Gold Copper Deposit in Qinghai
摘要
Abstract
Shuangpenxi gold copper deposit is located in Tongren-Zeku metallogenic belt of Western Qin-ling. The ore bodies occurred in the outer contact skarn zone between Indosinian granodiorite and Carboni-ferrous-Permian Ganjia Formation carbonate. It is one of the typical skarn deposits. Metallic minerals in the ore include mainly pyrrhotite, pyrite, chalcopyrite, limonite, while gangue mineral are mainly quartz, calcite, tremolite, diopside. Ore-forming processes have experienced three stages of mineralization, skarn, quartz-sulfide and supergene. Research of stable isotope geochemistry of the ores indicates: SD varying from-56‰ to -49‰, δ18O varying from +9. 2‰ to +9. 4‰, implying that ore-forming fluids are mag-matic water. δ34 S vary from +5.1‰ to+6. 6‰, suggests sulphur is derived from magma in depth. δ13C vary from -8.9‰ to -8.4‰, indicating δ13C is derived from deep magma. Skarn metallogenic model of Shuangpengxi gold copper deposit has been built initially combining geological characters, which has some useful significance to the ore prospecting work in the area.关键词
成矿模式/成矿流体/稳定同位素/双朋西金铜矿床Key words
metallogenic model/ore-forming fluid/stable isotope/Shuangpengxi gold copper deposit分类
天文与地球科学引用本文复制引用
张涛,刘庆云,张晓娟,祁顺德..青海双朋西金铜矿床成矿模式研究[J].西北地质,2012,45(1):184-191,8.基金项目
中国地调局青藏专项“青海同仁地区地质矿产调查”项目(1212010818051)资助 （1212010818051）
