甘肃省两当县张家庄-二郎坝石墨矿地质特征及找矿方向

Geological Characteristics and Prospecting Direction of Graphite Deposit in Zhangjiazhuang-Elangba, Liangdang County, Gansu Province

张家庄-二郎坝一带石墨矿属凤县-太白石墨成矿带的西延部分。矿体赋存于古元古界秦岭群雁岭沟组中,石墨矿化富集受东西向、北西西向断裂构造带控制。矿石类型有大理岩型、片麻岩型、构造片岩型。矿体呈扁豆状、透镜体状,连续性差。矿床成因属区域变质型。

The graphite deposit in the area of Zhangjiazhuang-Erlangba belongs to the west extension of the Feng County-Taibai graphite metallogenic belt. The ore bodies occur in the Yanlinggou formation of the Paleoproterozoic Qin Mountains group, and the graphite mineralization is controlled by the east-west and north-west-west fault structural belts. The ore types are marble type, gneiss type and tectonic schist type. The ore body is lenti and lenticular with poor continuity. The genesis of the deposit belongs to regional metamorphism type.