贵州遵义-纳雍一带寒武系黑色岩系中钼镍矿层的沉积特征  

SEDIMENTARY FEATURES OF MOLYBDENUM-NICKEL-BEARING STRATA IN THE CAMBRIAN BLACK ROCK SERIES IN ZUNYI-NAYONG AREA,GUIZHOU PROVINCE

作　　者：高军波[1] 魏怀瑞[1] 刘坤[1] 谭代卫[1] 杨瑞东[1] 

机构地区：[1]贵州大学资源与环境学院,贵州贵阳550003

出　　处：《地质与资源》2011年第3期234-239,共6页Geology and Resources

基　　金：贵州省优秀科技教育人才省长专项目资金项目(黔省专治合字(2009)105号);贵州大学博士点建设项目联合资助

摘　　要：遵义-纳雍一带的钼镍矿主要产于下寒武统牛蹄塘组的黑色页岩系中.通过对遵义金顶山新土沟钼镍矿剖面及纳雍水东钼矿区的系统研究,发现钼镍矿主要以碎屑状(竹叶状)、星散状、微层状分布,碎屑具有明显的定向排列,并具有波浪状展布的特点.靠近矿层中上部,碎屑粒径不断变小,以一些黄铁矿、黏土物质为主,呈黄褐色、土黄色的星散状、微层状分布,其中富矿部位黄铁矿十分发育,纹层较清晰;在矿层下部,发育一套热水成因的粗晶灰岩,下部见较多的热水成因的透镜状、柱状、结核状碳质体等构造标志.这些特征反映出该地区钼镍矿主要是在热水(液)喷流沉积作用下形成.The Mo-Ni deposits in Zunyi-Nayong area of Guizhou Province occur mainly in the black shale series of Lower Cambrian Niutitang formation,with ores in clasts,specks and micro-veins.The Mo-Ni-bearing fragments represent clear orientation and undulate distribution.The upper part of the Mo-Ni bed is composed of brown fine fragments with pyrite and clay.At the lower part,the ore bed consists of Mo-Ni-bearing clasts and clay.The sizes of the fragments get finer from bottom to top of the bed.Macrocrystalline limestone is developed under the Mo-Ni bed.The characteristics of the Mo-Ni bed shows that the Mo-Ni deposits in the Niutitang formation is formed by hydrothermal eruption sedimentation.

关 键 词：沉积特征 有机质 热水(液)喷流 镍钼矿 贵州省 

分 类 号：P618.65[天文地球—矿床学] P618.63[天文地球—地质学]