黄铁矿晶胞参数计算及某些杂质含量分布特征

本文以我国不同成因黄铁矿的微量元素分析、晶胞参数以及其他物理性质为基础,得出含钴镍黄铁矿的晶胞参数公式:a=5.4175+0.00124X+0.00271Y(X和Y分别代表CoS_2、NiS_2的摩尔百分数)。本文也考虑了As置换对黄铁矿晶胞参数的影响。根据我国207个黄铁矿的不同成因和化学分析结果,可以将它们分别归于16种矿床类型,其中钴黄铁矿仅产于沉积变质似层状铜矿床、沉积变质富铁矿中铜钴硫化物矿床以及某些富钴矽卡岩铁矿。指出与不同岩体(如S型。I型)有关的黄铁矿,以及不同变质作用(如有深部热卤水参与的沉积变质、区域变质)、火山作用有关的黄铁矿杂质元素标型特征的差异,并指出Se含量与S/Se对于区分岩浆热液矿床与沉积岩、层控Pb-Zn矿、卡林型金矿的意义。

CELL PARAMETER EQUATION OF PYRITE AND ITS GENETIC IMPLICATIONS

An unit-cell equation was suggested for Co-, Ni-bearing pyrites with dueallowance for the influence of As based on minor element contents, latticeparameters and some other physical properties measured on pyrite of differentorigins from China. 16 distinctive types of geological environments can berecognized from 207 chemical data of pyrite according to difference in impur-ity elements. It is clearly shown that pyrite occurring in sedimentary rocks,stratabound Pb-Zn deposits and Carlin-type gold deposits is quite differentfrom those of hydrothermal deposits in Se and S/Se ratio.