【作者】 李元元；

【导师】 钱壮志； 刘民武；

【作者基本信息】 长安大学 ， 矿产普查与勘探， 2009， 硕士

【摘要】 包尔图铜矿位于塔里木板块北缘南天山与中天山接触带的东段,乌瓦门-包尔图大断裂南侧,分布于艾木太乌拉背斜核部的一套变质岩中,是南天山-哈尔克-库米什金、铜、铅、锌多金属成矿带主要成矿区之一。本文对该矿床基础地质特征和岩石学、矿床学、岩石地球化学以及矿床地球化学等方面进行研究,取得了以下认识:(1)根据岩石变质程度和变质类型,初步提出矿区上志留-下泥盆统阿尔彼什麦布拉克组第一亚组的第一岩性段(Mi)和第二岩性段(Gn)的混合花岗岩、花岗质混合岩以及斜长片麻岩、角闪片麻岩应归为元古界星星峡群。(2)矿区出露的变质岩主要为副变质岩,少量正变质岩,其原岩为沉积岩及少量火山岩;在不同构造环境判别图中,大部分样品均落在大陆岛弧区内,说明包尔图铜矿的赋矿围岩形成环境为大陆岛弧环境。(3)通过岩/矿石稀土、微量元素地球化学研究,表明包尔图铜矿的成矿物质来源可能与混合花岗岩有关。(4)包尔图铜矿目前已经发现六个铜矿化带31条铜矿化体,现发现的各个矿体规模虽都较小,但从成矿条件、区域成矿显示、区域构造背景及矿区勘查现状等分析,该区铜矿有一定的找矿潜力。更多还原

【Abstract】 The Baoertu copper deposit is located in the Metamorphic rocks in the anticlines crest of Aimutaiwula, which located in the east part of the contact belt between South Tianshan and Middle Tianshan in the plate of Tarim, and on the south of the great faults of Wu’wamen-Bao’ertu. And the Baoertu copper deposit is one of the mainly metallogenetic areas, which are polymetallic metallogenic belts in South Tianshan-Haerke-Kumishenjin, including gold, copper, lead, zincum.This thesis analyzed the basic geological characteristics, petrology, mineral deposit geology, litho geochemistry, and deposit geochemistry of the copper deposit, acquired the following results:(1) According to the metamorphic grade and the metamorphic types of the rocks, suggesting that the mixed granite, granitic migmatite, plagioclase gneiss and hornblende gneiss of the first lithologic member(Mi) and the second lithologic member(Gn) in the first sub-formation of Aerbishimaibulake Formation in upper silurian-lower Devonian series belong to Xingxingxia group in proterozoic.(2) The outcrop of the rocks are mainly para-metamorphites, and the original rock is sedimentary rock and a small quantity of igneous rock. In the different diagram of tectonic environments, most of the samples fall into the part of the continental arc. It indicates that the tectonic environment of the metallogenetic area is the continental arc.(3) The rock and ore geochemistry of rare earth elements and trace elements indicates that the ore-forming material source of the Bao’ertu copper deposit may relate to the mixed granite.(4) Although the orebody scale is small (At present, it is discovered that there were six copper belts and thirty-one copper mineralized bodies), according to the analysis of metallogenic condition, regional metallogenic indication, regional tectonic setting, and the status in the reconnaissance, there are some prospecting potential for copper in this area.更多还原