摘要
莱历斯高尔铜钼矿是新疆地矿局近年在西天山地区新发现的一处斑岩型矿床.该矿位于哈萨克斯坦-准噶尔板块伊犁-伊塞克湖微板块博罗科努古生代复合岛弧带西段南侧,区域出露早古生代浅海相细碎屑岩、碳酸盐岩,其中侵入了泥盆纪、石炭纪酸性-中酸性岩浆岩.矿区见晚奥陶世、晚志留世地层及侵入其中的二长花岗岩、花岗闪长斑岩体.矿体产于晚泥盆世花岗闪长斑岩及外接触带(角岩化粉砂岩)中,花岗闪长斑岩具有幔源岩浆性质.围岩蚀变主要是花岗闪长斑岩中的硅化和钾长石化、黑云母化,表现出从岩体到围岩依次为钼、铜、铅锌矿化分带性,矿石品位低,矿化均匀.矿石矿物简单,主要是辉钼矿、黄铁矿.矿床具斑岩型成矿特点,在其外围一定区域内发现铜、铅锌和金矿化线索.综合分析矿田多见幔源小岩体侵入志留系浅变质细碎屑岩中等有利地质条件、铜钼组合地球化学异常、高极化中高阻激电异常及勘查成果,认为矿田具良好的与岩浆有关矿产潜力,含矿斑岩体西部剥蚀程度低,深部找矿潜力大,外围有寻找铜矿、铅锌矿的良好前景.
Lalisgar copper-molybdenum deposit is a new porphyry deposit discovered by Xinjiang Bureau of Geology and Mineral Resources in the western Tianshan area in recent years. The copper-molybdenum deposit is located in the south side of west part of Boluokenu Paleozoic compounded island-arc zone which belongs to Yili-Isec micro-plate of Kazakstan-Jungar plate. For the outcrop in the area, there are Early Paleozoic neritic facies fine grained clastic and carbonate, and Devonian and Carboniferous acid, intermediate-acid magmatic rocks invaded them. Late Ordovician and Late Silurian strata are found in the mine area and there are adamellite and granodiorite porphyry intrusions in them. Ore bodies are hosted in Late Devonian granodiorite porphyry and its external contact zone （hornfels siltstone）. The granodiorite porphyry has a property of mantle-derived magma, in which silicification, k-feldsparization and biotitization were formed. Mineralization zoning from the rock to wall rock is successively molybdenum, copper, lead and zinc mineralization.The ore deposit has lower quality, but uniform mineralization, and ore minerals are simple, which mainly are molybdenite and pyrite. It is characteristic of porphyry mineralization, and some mineralization clues were found at the external contact of the deposit. Based on comprehensive analysis of characteristics of geological mineralization conditions, such as mantle-derived small rocks invaded Silurian low metamorphic fine grained clastic in the ore field, geochemical anomalies of copper-molybdenum assemble, electric anomalies of high polarization, intermediate and high resistance and the results of current explorations, it is determined that the ore field has good mineral potentials related to magma and the west of the mineralized porphyry also has great potentialities in deep prospecting because of its lower denudation degree. The peripheral area of the porphyry has a good future of looking for copper, lead and zinc deposits.
出处
《新疆地质》
CAS
CSCD
北大核心
2009年第3期236-240,共5页
Xinjiang Geology
基金
新疆地质勘查中央专项资金项目(ZYZXKC2006-10)
国家科技支撑计划(2006BAB07B01)共同资助
关键词
西天山
莱历斯高尔
物化探异常
斑岩型铜钼矿
找矿前景
Deposit geology
Geophysical and geochemical anomalies
Porphyry copper-molybdenum deposit
Prospectingpotential
Lalisgar
Western Tianshan
