石英、黄铁矿及其包裹体的稀土元素特征——以胶东焦家式金矿为例  

REE features of quartz and pyrite and their fluid inclusions: an example of Jiaojia-type gold deposits, northwestern Jiaodong peninsula.

作　　者：李厚民[1] 沈远超[2] 毛景文[1] 刘铁兵[2] 朱和平[3] 

机构地区：[1]中国地质大学(北京)地球科学与资源学院 [2]中国科学院地质与地球物理研究所,北京100029 [3]中国科学院矿物资源探查研究中心,北京100101

出　　处：《岩石学报》2003年第2期267-274,共8页Acta Petrologica Sinica

基　　金：中国科学院黄金"九五"重大项目"山东重要金成矿区的成矿模式及找矿预测"(KZ951-A1-404-02-02);中国科学院创新工程项目"金矿资源战略接替基地若干靶区预测"(KZCX1-Y-03-01)资助

摘　　要：本文采用ICP-MS测定了焦家、马塘、东季、红布等焦家式金矿床中黄铁矿、石英及其包裹体的稀土元素组成。结果表明:采用ICP-MS直接测定黄铁矿包裹体的稀土元素是可行的;包裹体爆裂丰度虽然对稀土总量有影响,但矿源稀土元素背景值的差异也是流体中稀土总量差别的主要原因之一。∑REE、δEu、δCe及LREE/HREE、(La/Yb)_N、(Ce/Yb)_N、(La/Lu)_N都是有意义的稀土元素特征参数;焦家式金矿同一成矿阶段黄铁矿、石英及其包裹体的稀土元素特征相似,显示了它们的同源特征;不同成矿阶段黄铁矿、石英及其包裹体的稀土元素特征有差异,反映了其成矿流体特征的差异。This paper studies the REE features of pyrite and quartz and their corresponding fluid inclusions in Jiaojia, Matang, Dongji and Hongbu gold deposits in Northwestern Jiaodong Peninsula by ICP-MS. The conclusions we got are: (1) it is feasible to determine REE of inclusions in pyrite by ICP-MS directly; (2) the difference of REE background content is one of the reason why the FREE of fluid is different though the number of blowout inclusions can affect SigmaREE; (3) SigmaREE, deltaEu, deltaCe, LREE/HREE, (La/Yb)(N), (Ce/Yb)(N) and (La/Lu)(N) are all useful parameters reflecting ore-forming fluids; (4) the similar REE features of pyrite, quartz and their corresponding fluid inclusions in the same metallogenic phase show their origin and the different REE features of pyrite, quartz and their corresponding fluid inclusions in different metallogenic phase show the diferences in the original metallogenetic fluids.

关 键 词：稀土元素 包裹体 黄铁矿 石英 金矿 胶东 

分 类 号：P618.51[天文地球—矿床学]