四川省米易县茅坪石墨矿矿床地质特征及找矿标志探讨

Chacteristics of Maoping Graphite Deposit and Discussion on the Prospecting Mark in Miyi County of Sichuan

四川省米易县茅坪石墨矿床位于康滇断隆成矿带攀西裂谷带成矿亚带内,为区域变质与热接触变质双重因素作用下形成的沉积变质型石墨矿床。Ⅰ号主矿带呈层状、似层状产于中元古界会理群天宝山组一段硅质碳质板岩内,其顶底板为浅灰色、浅灰黄色绢云千枚岩,灰—深灰色含绢云板状千枚岩。通过对矿床区域地质、成矿条件、成矿作用过程以及含矿岩石的研究,摸清了矿床成因,以期对今后的地质工作提供参考。

Maoping graphite deposit in Miyi county of Sichuan province is located in the sub-zone of the west of Panzhihua rift belt of Kangding-Yunnan fault uplift metallogenic belt.It is a sedimentary metamorphic graphite deposit formed under the action of regional metamorphism and thermal contact metamorphism.No.1 main ore belt is shaped like layered,stratiform which originated in layer from the siliceous carbonaceous slate of the first member of Tianbaoshan formation,including Huili group within Proterozoic,the roof and floor as light gray,yellowish gray sericite phyllite,grey,dark grey sericite platy phyllite.This paper studies the regional geology,metallogenic conditions,metallogenic process and ore-bearing rocks of the deposit.It tries to find out the genesis of the deposit,so as to provide reference for future geological work.