新疆卡拉塔格VMS成矿系统浅析

Preliminary Study on the Kalatag VMS System, Xinjiang

卡拉塔格铜多金属矿集区为早古生代岛弧环境形成的火山成因块状硫化物（VMS）矿化系统，区内发育两种主要矿化样式，即切层脉状矿化和层状矿化，共同构成本区VMS矿化系统的原始双层结构，二者具成因与空间上的密切联系。前者就位于VMS系统下部热液补给带，形成脉状-网脉状矿床；后者就位于VMS系统上部的硫化物堆积层，形成层状矿床。建议今后加强对盆地建造、火山岩相、古火山机构与矿化系统间关系的研究。

The discovery of Kalatag Cu-multimetal Camp is a significant advance of mineral exploration in the eastern Tianshan in recent years. The deposits, including Meiling, Hongshi, Hongshan and Honghai, are hosted by Middle Ordo- visian intermediate-acid volcanics and vocaniclastics, which are therefore considered to be typical volcanogenic massive sulfide （VMS） deposits occurred in arc environment. Two major mineralinzing styles are defined in the area as follow- ing： 1） high-angle mineralized veins, veilets and/or stockwrks crosscutting their hosting stratigraphy as examplified by Hongshi deposit,and 2） strata-bounded or layered orebodies comformable with overlying volcaniclastic strata as exampli- fled by Hongai deposit, which constitute the original two-zone mineralizing structure of VMS deposit, representing the lower-seated feeder zones and the upper-seated sulfide deposition layers, respectively, in a VMS mineralizing system. The deposits discovered in the Kalatag mineral camp may belong to a huge volcano-hydrothermal system, or be smaller isolated and discrete volcano-hydrothermal systems.Detailed investigations on basin formations, facies of volcanic stra- tigraphy and volcano structures, as well as their spatial, temporal and genetic links to the hydrothermal systems, are de- served to conduct in future exploration, which will be valuable in follow-up discovery in the area.