内蒙古中部大黄花夕卡岩型铜多金属矿床特征  

MINERALOGICAL CHARACTERISTICS OF DAHUANGHUA COPPER POLYMETALLIC DEPOSIT IN CERTRAL INNER MONGOLIA

作　　者：李伟[1] 吴桐[1] 刘淼[1] 崔天日[1] 陈井胜[1] 李斌[1] 杨帆[1] 刘世峰 LI Wei;WU Tong;LIU Miao;CUI Tian-ri;CHEN Jing-sheng;LI Bin;YANG Fan;LIU Shi-feng(Shenyang Center of Geological Survey,CGS,Shenyang 110034,China;Mining School of Liaoning Technical University,Fuxin 123000,Liaoning Province,China)

机构地区：[1]中国地质调查局沈阳地质调查中心,辽宁沈阳110034 [2]辽宁工程技术大学矿业学院,辽宁阜新123000

出　　处：《地质与资源》2019年第5期443-447,共5页Geology and Resources

基　　金：国家自然科学基金青年科学基金项目“大兴安岭中段龙江盆地中侏罗统地层新研究”（41702032）;中国地质调查局项目“内蒙古1∶5万乌日图呼布等四幅区域地质调查”（DD20160048-04）

摘　　要：大黄花铜多金属矿位于赤峰-朝阳金多金属成矿带南部,矿化发生在燕山期正长花岗岩与石炭系酒局子组大理岩接触部位,局部构成铜(铁)矿体.夕卡岩矿物主要为石榴石、透辉石、透闪石、绿帘石、绿泥石、角闪石及阳起石,金属矿物有黄铜矿、辉铜矿、黝铜矿、斑铜矿、铜蓝及氧化次生矿物蓝铜矿、孔雀石、褐铁矿.围岩蚀变强烈,呈现清晰的蚀变分带现象,自接触带向外可分为较强的透闪石-阳起石化带,较强的透闪石-透辉石化带,弱蚀变的大理岩化带.金属元素组合特征明显,为Cu、Pb、Zn、Au、Ag组合.该铜多金属矿的形成与正长花岗岩的侵入作用有关,成矿时代为中侏罗世晚期,与朝阳-赤峰地区金多金属矿成岩成矿时代一致.The Dahuanghua Cu-polymetallic deposit is located in the south of Chifeng-Chaoyang Au-polymetallic metallogenic belt.The mineralization is occurred in the contact between Yanshanian syenogranite and Carboniferous Jiujuzi marble with Cu/Fe orebodies formed locally.The skarn minerals are mainly composed of garnet,diopside,tremolite,epidote,chlorite,hornblende and actinolite;while the metal minerals include chalcopyrite,chalcocite,tetrahedrite,bornite,covellite and oxidized secondary minerals such as azurite,malachite and limonite.The wall rock alteration is intensive,presenting a clear zonation:strongly-altered tremolite-actinolite zone,strong tremolite-diopside alteration zone,and weakly-altered marble zone outwards from the contact zone.The metallic element association of Cu-Pb-Zn-Au-Ag is obvious.This Cu-polymetallic deposit was formed in the late period of Middle Jurassic and related to the intrusion of syenogranite,which is consistent with the diagenetic-metallogenic age of Au-polymetallic deposits in Chaoyang-Chifeng area.

关 键 词：铜多金属矿床 成矿时代 夕卡岩型 内蒙古 

分 类 号：P618.41[天文地球—矿床学]