【作者】 朱浩锋；

【导师】 庞绪成； 张宪依；

【作者基本信息】 河南理工大学 ， 地质资源与地质工程， 2010， 硕士

【摘要】 新疆包尔图铜矿床位于塔里木板块北缘乌瓦门—包尔图大断裂南侧,矿床研究程度很低。通过野外勘查、常量元素分析、微量元素分析等手段,对包尔图铜矿床地质地球化学特征进行了初步研究,并运用灰色模型预测了深部成矿远景,取得主要成果如下:矿床地质特征:该矿床赋存于千枚岩、黑云斜长片岩、片麻岩、混合岩等一变质岩系中,由三个矿体组成。矿体主要呈脉状,长约100m～670m,金属矿物主要为黄铜矿、黄铁矿和磁黄铁矿,非金属矿物主要为长石、石英和绢云母等。矿石品位为0.23%～6.08%。矿化阶段主要分为石英脉阶段、硫化物―石英脉阶段、石英―碳酸岩脉阶段。地球化学特征:矿石∑REE值相对变化较大(∑REE=2.1ppm～139.6ppm),LREE/HREE=0.06～0.97,轻重稀土分异明显,重稀土相对富集。配分曲线属左倾型,与混合岩脉体的稀土元素配分模式相似,显示成矿过程与混合岩化作用有关。通过大地构造环境判别分析,研究区内混合岩脉体特征点大部分都落在与板块碰撞有关的火山岛弧环境内,从而推断包尔图铜矿床成因类型是受断裂构造控制的变质热液型铜矿床。深部预测:通过建立矿石品位灰色模型,预测18-4号矿体向深部延伸,品位逐步变大。该预测成果为矿床的深部勘探提供了理论依据。更多还原

【Abstract】 Xinjiang Baortu copper ore deposit is located in the north-border of Tarim plate and the south of Wuwmen-Baortu abruption,which have poor investigation.The author research on the geological-geochemical characteristics of Bartu copper ore deposit with methods of field exploration,macroelement analysisand trace element analysis and on the deep mineral perspection with Gray Model. The main fruit is as follows.Ore deposit geological characteristics:This deposit occrence in phyllite, biotite schist, gneiss, migmatite et.al a suit of metamorphics,which is made of three ore body. The most of it assume vein and is 100m～670m long, whose main metal mineral are chalcophylic, pyrit, dipyrit and main no-metal mineral are feldspar, quartz, sericite and so on. The grade of ore are 0.23%～6.08%.The stage of mineralization is divided into stage of quartz reef, stage of sulfide―quartz and stage of quartz-sulfide.Geochmical characteristics: The∑REE value of ore deposit is relative invariable(∑REE=2.1ppm～139.6ppm) and The LREE/HREE=0.06～0.97,which assume LREE and HREE is differentiate but HREE is relative enrichment. The partition curve belong to left-leaning type and the partition patterns of the ore deposit are similar with the vein of migmatite, which assum the the minearal source are likely to it.Via tectonic discriminant analysis,The most unique point of vein of migmatite fall on the envirnoment of volcanic arc,which is relate to the collision of plates.Therefore, the author conclude ore genesis type is metamorphogenic-hydrothermal copper deposit,which is controlled by fault..Deep perception:Via establishing Gray Model of grade of ore, The author forcast No.18―4 body that the more deep, the grade of ore more better.This fruit of prevision provide deep explorition basis for this deposit in theory.更多还原