阿尔泰南缘典型块状硫化物矿床成矿环境浅析

PRELIMINARY STUDY ON METALLOGENETIC ENVIROMENT OF TYPICAL MASSIVE SULFIDE DEPOSITS IN SOUTHERN MARGIN OF ALTAY MOUNTAINS

新疆阿尔泰南缘产有较丰富的块状硫化物矿床 ,主要分为块状硫化物铜 (锌 )矿、块状硫化物铅锌矿、块状硫化物铜 (金 )矿等基本类型 ,其代表分别是阿舍勒铜 (锌 )矿、可可塔勒铅锌矿、乔夏哈拉铜 (金 )矿。通过对这些矿床基本成矿特征及其成矿环境的分析对比 ,认为它们形成于相同的成矿大地构造背景及相近的产出环境 ,但又有各自的富集部位及控矿因素 ,找矿标志也有差别 ,属于阿尔泰南缘陆缘裂谷带早—中泥盆世海底火山喷流 -沉积环境下形成的同一成矿系列产物。

In southern margin of Altay Mountains, Xingjiang, there exist a series of massive sulfide deposits which are divided into three basic types named copper-(zinc) deposits, lead-zinc deposits and copper-(gold) deposits. Its representatives of these deposits are respectively Ashele copper-(zinc) massive sulfide deposit, Keketale lead-zinc massive sulfide deposit and Qiaoxiahala copper-(gold) massive sulfide deposit. By analysing and comparing their preliminary minerogenetic characteristics and environment, the authors think these deposits have same metallogenetic tectonic background and similar forming environment, and their enrichment space, ore-control factors and prospecting criteria are different from each other basically. These massive sulfide deposits belong to the same minerogenctic series formed in volcanic-exhalative-sedimentary environment hosted in early-middle Devonian epoch volcanic strata related to epicontinental rift zone in southern margin of Altay Mountains.