玉水铜多金属矿床的成矿地质条件及其成因分析

根据玉水多金属矿床1号矿体(P1)的产状、形态和矿化特征,分析了矿床的沉积环境、控矿构造、成矿方式等因素,对矿床的成因作了分析:矿床产于永安梅县晚古生代海西拗陷区内受古断裂构造控制的海底局限小盆地中,海西期海底火山活动,使淋取有基底地层、岩石中成矿物质的含矿卤水,沿古断裂构造上升,造成断裂内和旁侧岩石强烈的蚀变和脉状多金属矿化,在局部小盆地内侧沉积下火山-沉积岩和块状多金属矿层,金属硫化物按着距断层构造的远近和矿物溶解度的大小,形成水平与垂直分带现象。

The Ore- forming Geology Condition and Origin of Yushui Copper- polymetallic Deposit

On the basis of forms and characteristics of the existent deposits in Yushui Polymetallic deposit 1~# ore body(P1),sedimentary environment and ore-control structure and metallogenic model of the deposit are analyzed, the causes of deposit are analyzed:Late Paleozoic deposit is produced in Haixi depression region of Yongan Mei county,which was controlled by the ancient seabed faults limited small basin.Hercynian undersea volcanic activity,so is drenched basement,the ore-bearing rock-forming material situation brine,with rising along the ancient faults,which caused a strong vein of alteration and polymetallic mineralization in the rock fracture and on the flanking.They deposited volcano under the volcano-sedimentary rocks and massive metal seam in the local small medial sedimentary basin.In accordance with distance of fault structure and big and small of mineral dissolubility, horizontal and vertical zonation phenomenon of the metal sulfide mineral solubility formed.