Geological Characteristics and Genesis of Yincan Copper Deposit
GUO Zhou-ping1, ZHAO Xin-min1, BAI Yun2
1. Key Laboratory for the Study of Focused Magmatism and Giant Ore Deposits, MLR, Xi′an Center of China Geological Survey, Xi′an, Shaanxi 710054, China; 2. Tibetan Institute of Geological Survey for Nuclear Industry,Sichuan, Chengdu 610052, China
Abstract：The Yincan copper deposit located in an island arc belt which stretches from the north slope of South Mountains, Hexi corridor to Lenglong Mountain on North Qilian Orogen. A set of bimodal volcanic sedimentary formation distributed in the mining area. The ore-bodies occurred in the quartz keratophyre with obvious vertical mineralization zoning, the copper orebodies occurred at the top, and the zinc orebodies occurred at the bottom. The ore in this study was a pyrite-type polymetallic ore. The mineralization was directly or indirectly associated with volcanic activities, the deposit was a typical volcanic hosted massive sulfide type and formed in early Paleozoic on North Qilian Orogen.
[1] Sangster D F ,Scott S D. Precambrian statabound massive Cu-Zn-Pb sulfide deposits of North America[M]//Wolf K A. Handbook of Strata-Bound and Stratiform Ore Deposits. Amsterdam:Elsevier, 1976: 129-222. [2] Zartman R E, Doe B R. Plumbotectonic-the model[J]. Tectonophysics, 1981, 75: 135-162. [3] 宋叔和. 甘陕境内秦祁地轴两侧古生代断陷海西火山活动与多金属成矿的探讨[J]. 中国地质科学院矿床地质研究所所刊, 1985(2): 1-12. [4] 孙海田, 邬介人, 李锦平. 北祁连金属成矿省时-空格局、演化及成矿作用[J]. 地质学报, 1997, 71(2): 170-179. [5] Yang K, Scott S D. Possible contribution of a metal rich magma-tic fluid to a sea floor hydrothermal system[J]. Nature, 1996, 38(3): 420-423. [6] 李文渊. 聚敛型板块边缘火山岩浆流体的成矿作用[J]. 西北地质, 1999, 2(3): 6-11.
2015, Vol. 2 
