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甘肃北祁连山志留系沉积岩铜矿产于红绿交替碎屑岩系中 ,矿体产在志留系旱峡组灰绿色砂岩层的底部 ,具有明显的层控特征。地球化学特征表明 ,旱峡组碎屑岩中铜富集系数及其相关的矿物组合含量明显高于其它正常沉积岩。矿体宏观及微观特征表明主要控矿因素是沉积环境、沉积作用。
The Silurian sedimentary rock copper deposit in North Qilian Mountains of Gansu is produced in alternating red and green clastic rock series. The ore body is located at the bottom of the gray-green sandstone layer of the Daxia Formation in the Silurian, with obvious stratiform control characteristics. Geochemical characteristics indicate that the copper enrichment coefficient and its related mineral assemblages in the Daxia Group clastic rocks are obviously higher than those of other normal sedimentary rocks. The macroscopic and microscopic characteristics of the ore body indicate that the main ore-controlling factors are sedimentary environment and sedimentation.