黑龙江永新金矿地质特征及成因  

GEOLOGY AND GENESIS OF THE YONGXIN GOLD DEPOSIT IN HEILONGJIANG PROVINCE

作　　者：曲晖 赵忠海 李成禄 徐国战 田园[2] 孔申 王卓 谭树勋 

机构地区：[1]黑龙江省地质调查研究总院,黑龙江哈尔滨150036 [2]中国地质大学,湖北武汉430074

出　　处：《地质与资源》2014年第6期520-524,共5页Geology and Resources

基　　金：中国地质调查局"黑龙江多宝山地区矿产远景调查"项目(1212010781024)和"黑龙江多宝山地区异常查证"项目(1212011120690)资助

摘　　要：黑龙江永新金矿床的发现是多宝山矿集区外围地质找矿取得的一项新成果.矿床赋存在早白垩世火山盆地与古生代糜棱岩带接触地带的一个浅成相和潜火山岩相小侵入体及岩脉密集分布地段.潜火山相的潜英安岩、潜流纹岩等形成于成矿前或成矿期,受蚀变矿化;浅成相的花岗斑岩、闪长玢岩等形成于成矿后,破坏矿体.金矿体及矿化主要赋存在隐蔽爆破作用形成的蚀变角砾岩体中,其次赋存在蚀变角砾岩体外侧的糜棱岩类围岩中.该矿床的发现显示在黑龙江省西部的古生代糜棱岩带中存在与早白垩世火山作用有关的潜火山热液型金矿,也表明黑龙江多宝山斑岩铜矿老矿区的外围仍具有找矿潜力.The discovery of Yongxin gold deposit in Heilongjiang Province is a new geological prospecting achievement in the periphery of Duobaoshan ore-concentrated area. The deposit occurs in an area with small intrusive bodies or dykes of hypabyssal facies and subvolcanic rock facies, located in the contact zone of the Early Cretaceous volcanic basin and the Paleozoic mylonite. The sub-dacite and sub-rhyolite of subvolcanic rock facies, which formed before or during mineralization, were highly altered; while the granite-porphyry and dioritic porphyrite of hypabyssal facies, that formed after the mineralization, intruded into the ore bodies. The Au orebodies and mineralization are mainly hosted in the ahered breccia, which formed from crypto-explosion, or in the mylonite in the periphery of altered breccia. The discovery of this deposit indicates the existence of the subvolcanic bydrothermal gold deposits that related to the Early Cretaceous volcanism in the Paleozoic mylonite zone in Western Heilongjiang Province. It also shows the prospecting potential in the periphery of Duobaoshan porphyry copper field.

关 键 词：成矿特征 角砾岩体 潜火山热液 糜棱岩带 永新金矿 黑龙江省 

分 类 号：P618.51[天文地球—矿床学]