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.
出处
《地质与资源》
CAS
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
关键词
沉积特征
有机质
热水(液)喷流
镍钼矿
贵州省
sedimentary features
hydrothermal eruption
Mo-Ni deposit
Guizhou Province
