摘要
哈拉河银铜铅锌矿为内蒙古扎兰屯地区新发现的斑岩型矿床,斑岩体为钙碱性花岗闪长斑岩。围绕侵入岩体,围岩蚀变强烈。围岩蚀变与矿化作用关系的研究是斑岩矿床成矿过程研究的一项重要内容。对围岩蚀变类型、蚀变矿物组合以及蚀变类型与矿化体品位变化关系进行了研究。结果显示:哈拉河矿区内围岩蚀变类型主要有钾长石化、绢云母化、硅化、绿泥石化、绿帘石化和碳酸盐化等;蚀变分带比较明显,由深至浅依次为钾长石化带、绢英岩化带和青磐岩化带;区内蚀变与矿化关系密切,蚀变类型决定矿化类型和矿化强度,银矿化主要发育青磐岩化带内,铜铅锌矿化主要产在绢英岩化带内。
Halahe Ag-Cu-Pb-Zn deposit is a porphyry-type deposit newly discovered in Zhalantun,Inner Mongolia,the lithology of the host intrusion is calc-alkali granodiorite porphyry.In the ore field surrounding the intrusive rock mass,the wall rocks alteration is strong.Studying the relationship between wall rock alteration and mineralization is important for the study on the mineralization of porphyry-type deposits.In this study,wall rock alteration type,alteration mineral assemblage,and the relationship between alteration type and the change of orebody grade of the deposit were studied.The result of the study showed that the wall rock alteration types in the Halahe mining area mainly include the potash feldspathization,sericitization,silicification,chloritization,epidotization and carbonatization.There are exist obvious alteration zoning of the wall rocks,from the deep to the shallow,they respectively are belt of the potash feldspathization,belt of sericitization-silicification,and the prophylitic zone.There is a closely relationship between the wall rocks alteration and the mineralization in this area,the type of alteration correspond to a certain type of mineralization and mineralization intensity.The silver mineralization mainly occured in the prophylitic zone,and the Cu-Pb-Zn mineralization mainly occured in the belt of sericitization-silicification.
作者
高宏星
杨俊伟
姜治民
张宝林
GAO Hongxing;YANG Junwei;JIANG Zhimin;ZhANG Baolin(No.208 Geological Party,CNNC,Baotou 014010,Inner Mongolia,China)
出处
《矿产与地质》
2018年第6期1065-1069,共5页
Mineral Resources and Geology
关键词
哈拉河银铜铅锌矿
斑岩型矿床
围岩蚀变
矿化作用
扎兰屯地区
内蒙古
Halahe Ag-Cu-Pb-Zn deposit
porphyry deposit
wall rock alteration
mineralization
Zhalantun area
Inner Mongolia
