%0 Journal Article
%T 粤东新寮岽铜多金属矿区钻孔深部矿体铜同位素研究
%T Copper Isotope Studies of a Deep Ore Body in the Xinliaodong Copper-Polymetallic Deposit, Eastern Guangdong Province
%A 范飞鹏
%A 肖惠良
%A 陈乐柱
%A 李海立
%A 刘建雄
%A 邓中林
%A 李少斌
%A 林梗伟
%A 周霞
%A FAN,Fei peng
%A XIAO,Hui liang
%A CHEN,Le zhu
%A LI,Hai li
%A LIU,Jian xiong
%A DENG,Zhong lin
%A LI,Shao bin
%A LIN,Geng wei
%A ZHOU,Xia
%J 岩矿测试
%J Rock and Mineral Analysis
%@ 0254-5357
%V 36
%N 4
%D 2017
%P 420-429
%K 铜同位素;粤东;新寮岽铜多金属矿区;铜矿体;岩浆
%K copper isotope;Eastern Guangdong Province;Xinliaodong copper-polymetallic ore district;copper orebody;magma
%X 新寮岽铜多金属矿床是近年来粤东地区新发现的铜多金属矿床之一,矿区位于东南沿海锡、钨、铜等重要矿产发育地区,成矿地质条件非常好。本文通过对矿体中黄铜矿的铜同位素研究表明,其δ65Cu值(-0.34‰~+1.37‰)与斑岩型矿床的δ65Cu值基本一致,成矿物质Cu主要来源于深部岩浆,成矿流体显示为中高温(250~420℃)岩浆热液特征,Cu的分馏与岩浆热液活动关系密切,矿体的形成与成矿流体出溶有关。铜同位素组成随深度增加有增高趋势,能形成规模矿体。同时,铜同位素可以直接指示热源的位置,在热液流体石英脉出现的区域,铜矿体δ65Cu值都低于0,在热液接触带、特殊的赋矿围岩和构造作用部位铜同位素值较高,预示着主矿体的边缘或前锋,是最为明显的找矿标志。
%X The Xinliaodong copper-polymetallic deposit of Eastern Guangdong Province is one of newly discovered deposits. The ore district belongs to tin, tungsten, and copper ore cluster in the southeast coast, which have a very good ore-forming geological conditions. Chalcopyrite has δ65Cu value ranging from-0.34‰ to +1.37‰, which is consistent with δ65Cu value of porphyry deposits, indicating that ore-forming material Cu was derived from deep magma and ore-forming fluids were medium-high-temperature (250-420℃) magmatic-hydrothermal fluids. There is a close relationship between the fractionation of Cu isotope and magmatic hydrothermal activity. The formation of ore body is related to the dissolution of ore-forming fluids. With the increase of depth, there is atrend of increasing δ65Cu value, indicating a potential of a largee orebody. Copper isotope can directly indicate the location of the heat source. The δ65Cu values are below 0 for copper ore bodies close to the hydrothermal quartz veins.But the copper isotope values are higher in the hydrothermal contact zone, special ore-bearing surrounding rock and tectonic zone where indicates the edge or the front of the main ore body, most obvious ore prospecting mark.
%R 10.15898/j.cnki.11-2131/td.201609010133
%U http://manu.ykcs.ac.cn/ykcs/ch/reader/view_abstract.aspx
%1 JIS Version 3.0.0