【摘要】 徐家沟铜矿床位于勉(县)-略(阳)-阳(平关)铜多金属矿化集中区中部的铜厂矿田西北部,矿体产于中上元古界郭家沟组中的片理化细碧岩带內,已圈定铜矿体13条,多为盲矿体。矿石主要自然类型为黄铁矿化-磁黄铁矿化-片理化细碧岩型,属于火山沉积-构造、岩浆改造型铜矿床。郭家沟组中的细碧岩为铜的主要矿源岩,细碧岩中的近东西向构造片理化带为矿质富集提供了富集通道和空间。铜厂闪长岩体为成矿提供了动力、热源和主要硫源,成矿受上述地层岩性、构造、岩浆岩因素联合控制。更多还原

【Abstract】 Xujiagou copper deposit lies in the northwest of Tongchang ore field in the central Mianxian-Lueyang-Yangpingguan copper polymetallic mineralization-intensive area. The ore body is hosted within the schistose spilite zone of middle-upper Proterozoic,and 13 orebodies have been delineated,but most of orebodies are blind. The mineralization consists mainly of pyritization-pyrrhotitization-schistositied spilite,indicating a volcanic sedimentary-tectonics and magmatic reformation type copper deposit. The spilite of Guojiagou Formation is the source of copper mineralization. The nearly EW-striking schistose structure zone in spilite provides channels and space for enrichment of ore-forming material. The Tongchang diorite provides mineralization with dynamics and thermal source,especially sulfur. The formation of the Xujiagou copper deposit is controlled jointly by above-mentioned stratum,structure and intrusive rock.更多还原