西昆仑苦阿金铜铁矿地质特征及成因类型探讨

石炭系阿羌岩组为本区的矿源层.灰绿色糜棱岩化强蚀变安山岩、英安岩夹中层状大理岩的绿岩组合是本区的主要含矿层位,矿体在空间分布上有明显的层控特点,是本区最具找矿意义的地层.从矿区地层岩性、变质作用、岩浆作用、脆-韧性变形作用等主要控矿因素综合分析,成矿物质来源于火山活动和沉积作用,后经变质作用和岩浆作用的改造,形成绿岩带中与火山-沉积作用有关的沉积变质型金、铜、铁矿床,同时经脆-韧性变形,具有构造蚀变岩型金铜和磁铁矿型金铁铜共生的特征,区域变质、岩浆热液、韧性剪切共同作用促使了本矿床的形成.认为本矿床属于多型共生的多元矿床.

THE GEOLOGICAL CHARACTERISTICS AND THE GENETIC TYPE OF AU FE CU DEPOOSIT AT THE KUA, WEST KUNLUN MOUNTAIN

he source bed of this area is existed in carboniferous period Aqiang formation. The main mineral-bearing position of this area is the greenstone combination of andesite altered from gray green mylonitic and marble sandwiching in dacite. The ore body has an obvious characteristic of stratabound deposit in space distribution. This area is expected to be the most significant stratum for prospecting. Comprehensively analyzing the main metallogenic factors from stratum rock character ,metamorphism,magmatism , brittleness- ductility deformation in mine, it indicates that the ore-forming substance overpassed a series of volcanogenic ore-forming process and succeeding geologic process, the sedimentary-metamorphic deposit of Au,Cu,Fe were formed in greenstone zone. The KuA mineral deposit belongs to multiform paragenetic ore. In a word, the form of KuA mineral deposit rooted from common ore-forming process of regional metamorphism, magmatism, ductility shear deformation. It has paragenetic characteristic in Au, Cu ore of altered rock types and Au,Cu,Fe of magnetite types.