会泽金牛厂铅锌矿床地质地球化学特征及成矿预测

【作者】 熊亮；

【导师】 朱杰勇；

【作者基本信息】 昆明理工大学 ， 地球化学， 2010， 硕士

【摘要】 滇东北地区是我国铅、锌、银的重要产地之一,已发现铅锌矿床、矿点和矿化点多处,而绝大部分铅锌矿床赋矿围岩都是碳酸盐岩,尤其是白云岩,如灯影组的藻白云岩和硅质白云岩、渔户村组的含磷白云岩、摆佐组和宰格组的粗晶白云岩等。金牛厂铅锌矿床位于会泽县待补镇金牛村,目前在该矿区发现的2条铅锌矿体都赋存于下寒武统筇竹寺组八道湾段的泥质粉砂岩中,对滇东北的铅锌找矿来说是一个新的突破。本论文在重点研究金牛厂铅锌矿体特征的基础上,对金牛厂的构造以及赋矿围岩进行了深入研究。认为金牛厂铅锌矿同时具有构造控矿、地层控矿、岩性组合控矿特征,并认为金牛厂下寒武统筇竹寺组玉案山段的碳质页岩起到了良好的遮挡层作用。对金牛厂铅锌矿床地层的微量元素、稀土元素、常量元素进行了详细分析,并对金牛厂铅锌矿金属成矿物质来源进行了探究,认为金牛厂下寒武统筇竹寺组砂页岩为主要矿源层,渔户村组为次要矿源层,矿床成因方面认为金牛厂铅锌矿床属于沉积-改造成因。在详细的地质工作基础上,对金牛厂矿区开展了土壤地球化学找矿工作。根据土壤地球化学异常,目前在金牛厂大棚子矿段圈定重点找矿靶区4处,其中A级异常1处,B级异常3处,圈定的靶区与物探异常呈很好的吻合性。通过对土壤地球化学异常浓集区进行找矿工程查证,找矿效果较好,在一定程度上推进了金牛厂的铅锌找矿工作,同时也会使这种土壤地球化学找矿方法具有更重要的理论和实践价值。更多还原

【Abstract】 Northeastern Yunnan origin is important place in China, which possess a lot of Pb、Zn、Ag mine, many lead-zinc deposits, mining points and mineralization have been found. but most of the Pb-Zn ore-hosted strata are carbonate rocks. as Dengying formation Yuhucun formation Baizuo formation and Zaige formation,. Jinniu village which belonged to Daibu town of Huize,The 2 Pb-Zn orebodies which we found are located in the Badaowan member of Qiongzhusi formation, which is is a new breakthroughs in northeast Yunnan for exploration.This thesis focuses on physical characteristics of Jinniu Chang, studied structure and re-hosted strata of mineral deposit, Thinked Jinniu Chang mineral deposit controed by layer, stratigraphic, lithological combination control characteristics, and shale contains a lot of carbon, so that the carbonaceous shale played a role with geochemical barrier.Detailed analyzed Jinniu Chang ore district of trace elements, rare earth elements, major of elements in layer,and inquiried material sources, The characteristics of rare earth elements in strata and ore show that the Qiongzhusi formation is the mainly ore source, and the Yuhucun formation is the Secondary ore source. lead-zinc deposits are sedimentary-transformation causes.On the detailed basis of geological work, did the soil geochemical Ore-prospecting work, and the target and the geophysical anomaly with a good portable, delineated ore prospecting targets 4. A level land B-level 3.and abnormal concentration center and a new ore body are better identical by investigating soil geochemical anomaly concentration areas of the study area. It indicates that, the effect of using the soil geochemical halo to prospect ore is obvious in this area, is worth further promotion in the adjacent areas.更多还原