云南勐腊茅草山铜矿床地质特征及控矿因素分析

Geological Features and Ore-Controlling Factors of the Maocaoshan Copper Deposit, Mengla County,Yunnan Province, China

茅草山铜矿为一砂岩型铜矿,矿体赋存于白垩系上统曼宽河组地层中。矿体呈层状、似层状产出,受近东西的断裂控制,矿体多在近东西断裂与近南北向断裂交汇部位富集。矿区白垩纪为炎热半干燥的古气候,氧化及还原交替的沉积环境,有利于金属硫化物的沉淀富集。综上,该区成矿受地层岩性、构造及岩相古地理"三位一体"的控制。

The Maocaoshan copper deposit is a sandstone—type copper deposit, occuring in Mankuanhe formation of upper cretaceous.The ore is layered and layered form. The ore is controlled by the west-east trending faults, and the orebodies found occur in west-east trending faults and north-south trending faults at their intersections. On cretaceous paleoclimate of torridity-semiarid and sedimentary environment of oxidation and reduction in turn, is beneficial to enriching of metal sulphides. So, the maocaoshan copper deposit is controlled by formation lithology, fault and lithofacies paleogeography.