石英黄铁矿中群体包裹体微量元素研究——以胶东焦家式金矿床为例  

FEATURES OF TRACE ELEMENTS IN PYRITE, QUARTZ AND THEIR FLUID INCLUSIONS:AN EXAMPLE FROM 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[2] 

机构地区：[1]中国地质大学地球科学与资源学院,北京100083 [2]中国科学院地质与地球物理研究所,北京100029

出　　处：《地质科学》2004年第3期320-328,共9页Chinese Journal of Geology(Scientia Geologica 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"(KZ951A140 4 0 20 2 );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 0 301);国家重点基础规划发展项目"大规模成矿与大型矿集区预测"(G19990 43 2 1 1 )资助

摘　　要：采用ICP MS测定了胶东焦家、马塘、东季和红布金矿床黄铁矿、石英及其群体包裹体的微量元素组成。结果表明 ,黄铁矿包裹体与石英包裹体均富集Cu、Pb和Zn等成矿元素 ,反映了成矿流体的特征 ;不同成矿阶段成矿流体特征有差异 ,石英黄铁矿化阶段、黄铁绢英岩化阶段、石英多金属矿化阶段石英及其包裹体微量元素含量均高于成矿较差的钾长石化阶段的石英及其包裹体 ;与陆壳微量元素丰度相比 ,黄铁矿及石英中Cu、Pb、Zn、Ag和Au等成矿元素富集 ;与地热卤水及斑岩铜矿卤水微量元素含量相比 ,黄铁矿及石英包裹体中以Cu为代表的成矿元素均较其它元素相对富集 ,反映了成矿流体中富集成矿元素的特征。上述结果表明 ,可以采用ICP MS测定黄铁矿及石英包裹体微量元素来研究成矿流体的特征。The features of trace elements in the pyrite, quartz and their corresponding fluid inclusions in the Jiaojia, Matang, Dongji and Hongbu gold deposits in the northwestern Jiaodong Peninsula were studied by ICP MS, with the main conclusions being as follows. (1) It was feasible to determine the trace elements of the fluid inclusions in pyrite and quartz by ICP MS directly. (2) The fluid inclusions in both pyrite and quartz were rich in Cu, Pb, Zn, etc., showing the characteristics of metallogenic fluids. (3) Contents of trace elements in the quartz and their fluid inclusions in main metallogenic phases, such as quartz pyrite phase, pyrite sericite quartz phase, and quartz polymetal phase, were higher than that in K fledspar phase, which indicated that the fluids in varied metallogenic phases should have different compositions. (4) Contents of Cu, Pb, Zn, Ag as well as Au in the pyrite and quartz were higher than those in the continental crust. (5) To compare with the subterranean brine and porphyry copper brine, the mineralization elements, such as Cu, were relatively richer than other elements in the fluid inclusions in the pyrite and quartz, which meant that the metallogenic fluids were rich in mineralization elements. What mentioned above demonstrated that the characteristics of metallogenic fluids could be studied by working on trace elements in the fluid inclusions of pyrite and quartz by ICP MS.

关 键 词：微量元素 流体包裹体 黄铁矿 石英 金矿 胶东 

分 类 号：P578.24[天文地球—矿物学] P595[天文地球—地质学]