新疆西昆仑特格里曼苏砂岩型铜矿浅紫交互带特征及富矿规律浅析

Characteristics and Mineralization Regularity of the Light-Purple Interaction Zone in the Teglinmansu Sandstone-Type Copper Deposit of the West Kunlun Orogenic Belt,Xinjiang

新疆西昆仑特格里曼苏铜矿处于西昆北恰尔隆-库尔良构造分区克孜勒陶组(D 2 kz)中,矿体呈层状、似层状及透镜状产出,受地层控制。浅色砂岩与紫色砂岩的交互带是铜矿产出的有利部位。通过对特格里曼苏砂岩型铜矿的调查研究,认为其含铜建造原生色以紫红色为主,浅色层为特殊的沉积体。含铜建造中浅紫交互带可分为成岩期、后生期及改造期三类:成岩期主要受沉积作用及孔隙水影响,使含矿建造中上部富集成矿;后生期主要受构造作用及建造水影响,“紫化”过程中在浅紫过渡带富集成矿;改造期主要受断裂及构造热液影响,在构造交汇部位富集成矿。

The Teglinmansu copper deposit of Xinjiang is located in the northern Qia'erlong-Kuerliang tectonic region of the West Kunlun orogenic belt,where ore bodies occur in the Devonian Keziletao Formation(D 2 kz)with layered and lenticular forms,controlled by strata.The interaction zone between light-color sandstone and purple sandstone is a favorable deposit position of copper.Based on detail investigations on the Teglimansu sandstone-type copper deposit,we suggest that the original color of copper is mainly purple red,whereas the light layers are special sedimentary bodies.The mineralization of the light-purple interaction zone in copper construction can be divided into three types:diagenetic,post-diagenetic and reconstruction periods;the mineralization during the diagenetic period is mainly controlled by sedimentation and pore water/fluids,which allowed the copper to be enriched in the upper and middle parts of the formation.The later period was affected by tectonic activity and formation fluids.During the purple-becoming process,enrichment and mineralization occurred in the light-purple transition zone.And during the reconstruction period,the mineralization commonly occurred in tectonic junction controlled by faults and tectonic hydrothermal fluids.