南华砷铊矿床碱金属碱土金属和稀土元素地球化学  

ALKALI METAL, ALKALI EARTH AND REE GEOCHEMISTRY OF THE NANHUA As-Tl DEPOSIT, YUNNAN

作　　者：张忠[1] 张兴茂[1] 张宝贵[1] 

机构地区：[1]中国科学院地球化学研究所,贵阳550002

出　　处：《矿物学报》1999年第1期112-119,共8页Acta Mineralogica Sinica

基　　金：国家自然科学基金!(批准号 :4 963 3 1 1 0 );中国科学院矿床地球化学开放研究实验室基金资助项目

摘　　要：南华砷铊矿床位于云南省南华县城东南 ,距县城 55km。矿床主要产于上侏罗统江边组雄黄厂段 (J13 c) ,以砷和铊元素组合为特征 ,属于典型的低温热液改造矿床。通过矿床地质、碱金属、碱土金属和稀土元素的地球化学研究 ,对矿床成矿作用进行讨论。成矿流体是具有 δCe和δEu负异常的酸性溶液 ,基本保留了矿源层的稀土分布模式。在成矿过程中亲石元素和亲硫元素均不同程度地参与成矿作用。The Nanhua As Tl deposit is located 55 kilometers southeast of Nanhua County, Yunnan Province. The deposit occurs mainly in the Xionghuangchang sector (J 1 3c) of the Upper Jurassic Jiangbian Formation, which is characterized by the As Tl association. The deposit is a typical epithermal reworked deposit. Based on the geochemical studies of alkali metals, alkali earth metals and rare earth elements in conjunction with its geological features this paper discussed the metallogenesis of the Nanhua deposit. The ore fluid was an acidic solution characterized by δCe and δEu negative anomalies and it basically maintains the REE patterns of the original source bed. The lithophile and sulphophile elements are believed to have been involved to a varying extent in the process of ore deposition.

关 键 词：砷铊矿床 碱金属 碱土金属 稀土族 铊矿床 矿化 

分 类 号：P618.640.4[天文地球—矿床学] P618.704[天文地球—地质学]