罕达盖矽卡岩型铁铜矿体与围岩稀土元素地球化学特征  

REE GEOCHEMICAL CHARACTERISTICS OF THE HANDAGAI SKARN-TYPE IRON-COPPER ORE BODY AND WALL ROCKS

作　　者：唐世新[1] 马生明[1] 朱立新[2] 李建军 

机构地区：[1]中国地质科学院地球物理地球化学勘查研究所,河北廊坊065000 [2]中国地质科学院,北京100037 [3]华北地质勘查局五一九大队,河北保定071051

出　　处：《物探与化探》2011年第6期727-732,共6页Geophysical and Geochemical Exploration

基　　金：国家科技支撑计划项目(2006BAB01A10)

摘　　要：以含矿热液活动为联结点,将赋矿围岩与岩体作为一个整体系统,研究罕达盖矽卡岩型铁铜矿化试验区钻孔内的岩石经含矿热液作用后稀土元素的含量变化,认为依据稀土元素地球化学特征不仅可以判断矿床(化)成因,还可以识别成矿流体特征及成矿元素迁移的物理—化学控制因素。研究表明,试验区矽卡岩型铁铜矿石是含矿热液接触交代形成的;含矿热液温度相对较高,具有贫∑REE、富HREE和Ce等特征。这些发现使应用稀土元素地球化学特征进行找矿具备了一定的潜力,为扩展地球化学勘查新指标奠定了基础。Regarding host rocks and magmatic rocks as a whole system connected by ore fluid activity,the authors systematically investigated the REE behaviors of magmatic rocks,host-rocks and skarns influenced by ore-bearing fluid in the Handagai skarn-type Fe-Cu mineralization area.The REE compositions of Fe-Cu ores imply that they were derived from the contact metasomatism and the ore-forming hydrothermal fluid had relatively high temperature.The authors infer that the ore fluids should be characterized by ∑REE depletion and relative enrichment of ∑HREE and Ce.Results of the study indicate that the application of REE geochemistry to mineral prospecting has great potential.

关 键 词：稀土元素 含矿热液特征 物理—化学条件 矿化成因 罕达盖矽卡岩型铁铜矿化 

分 类 号：P632[天文地球—地质矿产勘探]