中祁连东段后山里地区铜金成矿规律及成矿预测  

Metallogenic regularity and prognosis of copper and gold in Houshanli area,eastern segment of Middle Qilian

作　　者：黄涛 HUANG Tao(The First Geological and Mineral Exploration Institute of Gansu Geological and Mineral Exploration and Development Bureau,Tianshui 741020,China)

机构地区：[1]甘肃省地质矿产勘查开发局第一地质矿产勘查院,甘肃天水741020

出　　处：《世界有色金属》2023年第19期88-90,共3页World Nonferrous Metals

摘　　要：研究区位于中祁连造山带东缘,区内经受了长期持久的岩浆侵入作用和构造变质作用叠加的影响,地质构造极为复杂,总体构造线呈北西向。研究区出露地层有古元古代陇山岩群和葫芦河岩群。区内岩浆活动十分强烈且岩性特征非常复杂,其中与矿化密切的是各类斑岩和花岗闪长岩。区内主要断层有北西西向、北东向、近东西向和近南北向四组,其中北西西向为区内的基底导矿断层,其它三组断层为次级断层,是区内主要容矿和控矿构造。区内矿化蚀变种类较多,主要为浅变质热液蚀变特征,蚀变有硅化、黄铁矿化、铅锌矿化、褐铁矿化、绢云母化、绿泥石化、碳酸盐化,局部见孔雀石化。通过研究对比,总结了区内铜金矿成矿要素,建立了成矿模式图。在后山里铜金矿床研究分析的基础上,编制了研究区铜金矿预测要素表,建立了预测模型。The study area is located in the eastern margin of the central Qilian orogenic belt.It has undergone a longlasting 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 coppergold 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 

分 类 号：P618.51[天文地球—矿床学]