赛里木湖一带的元古界及其对铜矿化的控制

西天山中、上元古界包括蓟县系库松木切克群和青白口系开尔塔斯群，为一套海相碳酸盐岩夹少量细碎屑岩和泥质岩，并有多层钾长岩、硅质岩和透辉岩等热水沉积岩，其沉积相为浅水碳酸盐台地相．上述地层为本区含矿地层，不仅其成矿元素含量高，而且产有热水沉积型和以矽卡岩型为主的复合型两类层控铜多金属矿床。地层对本区铜矿化有明显控制作用

THE PROTEROZOIC ERATHEM AND STRATIGRAPHIC CONTROLS OF CU-MINERALIZATION IN THE AREA OF THE SAIWANGMU LAKE

The middle and upper proterozoic erathem in the western Tianshan mountain including the kusongmuqieke Group, Jixian System, and Kaiertasi Group, Qingbaikou System, mainly consist of a suite of marinecarbontite which mixes a small amount of hydrothermal sedimentary rocks like finned-clasolite, mudrock, silicalite and feldsparlite. There are obvious differences between the two strata that the Qingbaikou System enrichs the C-rich ilmianated limestones and various allochemical limestones, and the Jixian Systemenrichs theSt-and Mg-rich carbonatites, algal stromatolithic limestones and hydrothermal sedimentary rocks.There are the following sedimentary factes in the middle-upper Proterozoic area: the neritic basin factes,the plateau-front clinofacies, the plateauborder beach factes, the open plateau factes, the local plateau facies,the tidal flat facies and the continent-marginal neritic lacustrine factes. All of the factes indicate the clearchangeable patterns in time and space.The studies show that the Proterosoic strata and sedimentary factes play the important role in controls ofCu and other metallic mineralization.