吉林夹皮沟矿集区二道沟金矿床稀土元素特征与成矿模式  

Rare earth elements characteristics and metallogenic pattern of Erdaogou Gold Deposit,Jiapigou high ore concentration area,Jilin

作　　者：于重远 李跃东[1] 张永哲 Yu Zhongyuan;Li Yuedong;Zhang Yongzhe(Jiapigou Mining Industry Co.,Ltd.,China National Gold Group Co.,Ltd.;Beijing Jinyou Geological Exploration Co.,Ltd.)

机构地区：[1]中国黄金集团夹皮沟矿业有限公司 [2]北京金有地质勘查有限责任公司

出　　处：《黄金》2022年第5期28-33,共6页Gold

基　　金：中国黄金集团有限公司地质科研专项基金项目(ZJ-KY/2018-ZY-07)。

摘　　要：二道沟金矿床是夹皮沟矿集区内十分重要的典型金矿床,夹皮沟矿集区属于滨太平洋成矿带的重要矿集区之一。为确定二道沟金矿床稀土元素特征、矿床类型,对岩心样品进行了采集与分析。结果表明:各类岩石均具有向右倾斜的轻稀土元素富集、重稀土元素分异不明显、轻稀土元素曲线的斜率明显大于重稀土元素的特征;发生蚀变与未发生蚀变的岩石轻稀土元素与重稀土元素分异程度高度一致,认为成矿流体来源与中生代中—酸性脉岩(如正长斑岩)关系密切;结合稀土元素特征,进一步确认二道沟金矿床为典型的岩浆热液型金矿床。Erdaogou Gold Deposit is a very important typical gold deposit in Jiapigou high ore concentration area,which belongs to one of the important high ore concentration areas in off-shore Pacific metallogenic belt.The rock core samples are collected and analyzed to determine the rare earth elements characteristics and deposit types in Erdaogou Gold Deposit.The results show that each type of rocks is characterized by right-inclined LREE enrichment,less obvious HREE differentiation,obviously greater inclination rate of LREE than HREE;the differentiation is highly consistent between altered and yet altered rock LREE and HREE,indicating close relation between ore-forming fluids source and Mesozoic medium-acidic vein rock such as orthophyre;given the LREE characteristics,Erdaogou Gold Deposit is further confirmed as typical magmatic hydrothermal fluid gold deposit.

关 键 词：稀土元素特征 成矿模式 含矿构造带 正长斑岩脉 二道沟金矿床 

分 类 号：TD11[矿业工程—矿山地质测量] P618.51[天文地球—矿床学]