摘要
Abstract
The study area is located in the eastern margin of the central Qilian orogenic belt.It has undergone a long-lasting superimposition of magmatic intrusion and tectonic metamorphism.The outcrops in the study area are Proterozoic Longshan Group and Huluhe Group.The magmatic activity is very strong and the lithology is very complex.The porphyry and granodiorite rocks are closely related to the mineralization.The main faults in the area are composed of four groups:NW,NE,nearly E-W and nearly s-n,of which NW is the basement ore-conducting fault and the other three groups are secondary faults,it is the main ore-hosting and ore-controlling structure in the area.There are many types of mineralization and alteration in this area,which are characterized by epimetamorphic hydrothermal alteration,such as silicification,pyrite mineralization,lead-zinc mineralization,limonite mineralization,sericite mineralization,chlorite mineralization and carbonate mineralization,petrified Malachite was seen locally.Based on the study and comparison,the metallogenic factors of copper-gold deposits in the area are summarized,and the metallogenic model map is established.On the basis of the research and analysis of houshanli copper-gold deposit,the table of forecasting factors of copper-gold deposit in the study area is compiled and the forecasting model is established.关键词
中祁连东段/后山里/铜金矿/成矿规律/成矿预测Key words
eastern segment of Middle Qilian/Houshanli area/Copper and gold/Metallogenic regularity/Metallogenic prognosis分类
天文与地球科学
