福建紫金山矿田黄铁矿标型特征研究  

Reaserch on Typomorphic Characteristics of Pyrite from Zijinshan Orefield

作　　者：李晓敏[1] 蔡江明 刘文元[1] 邱万昌 潘志龙[1] 杨智飞 

机构地区：[1]福州大学紫金矿业学院,福州350108

出　　处：《福建地质》2015年第3期181-190,共10页Geology of Fujian

基　　金：福建省自然科学基金(编号:2012J01173)

摘　　要：通过手标本及显微镜下矿相学观察，结合电子探针成分及X射线粉晶衍射分析，总结紫金山矿田各矿床的黄铁矿形态标型、结构标型及成分标型特征，发现紫金山矿田黄铁矿主要晶形为八面体、立方体、五角十二面体及其聚形，晶胞参数值的变化范围为a0=0．54112～0．54197nm，平均0．54158nm。自形一半自形八面体和立方体晶形，粒度粗，淡黄色黄铁矿晶胞参数接近于正常值，其含矿性小；而他形一半自形，八面体，五角十二面体及其聚形黄铁矿，粒度细小，晶胞参数偏大，一般表现为浅铜黄色，含矿性高。w（S）、w（S）／w（Fe）、w（Co）／”（Ni）比值指示了紫金山矿田的成矿热液来源及成矿温度的变化，并对具环带结构黄铁矿的不同环带进行了电子探针成分分析。Through the observation of the specimens and mineralography, combined with analysis of electron microprobe and X ray powder diffraction, the authors summarized the typomor- phic characteristics of pyrite from Zijinshan orefield, including its morphology, structure and composition, which show that the main crystal form of pyrite from Zijinshan orefield are oc- tahedron, pentagonal dodecahedron, cubic and their combination form. The crystal cell pa- rameters of pyrite changes from 0. 54112nm to 0. 54197 nm, the average of a0 is at 0. 54158 nm. The euhedral-hypautomorphic octahedral, cubic, particle size, and pale yellow pyrite is likely to contain less useful minerals, and its crystal cell parameters are similar to normal. The allotriomorphic-hypidiomorphic, octahedral, pentagonal dodecahedral and the combina tional form of pyrite is usually small in size and contains more useful minerals. And its crys- tal cell parameters tend to be bigger, generally present the color of brass yellow. The con- tent of S and the ratios of S/Fe, Co/Ni in pyrite indicate the genesis of Zijinshan orefield and the variation of its metallogenic temperature, and the different zone of a ring structure pyrite has been analyzed by electron probe components.

关 键 词：黄铁矿 形态标型 结构标型 成分标型 福建紫金山 

分 类 号：P613[天文地球—矿床学]