新疆东昆仑白干湖成矿带成矿地质背景及找矿方向

成矿带位于塔里木-华北板块(Ⅰ)南部,柴达木微陆块(Ⅱ)南缘的祁漫塔格加里东褶皱系。区内各矿种成矿与地质背景的专属性明显:研究区东部鸭子泉一带的鸭子泉混杂岩带控制着区内铜、金、铁多金属矿产的分布;中东部白干湖—黑山一带下元古界金水群、志留系白干湖组与阿尔金深大断裂的次一级构造白干湖断裂,以及北东向展布的加里东—华力西期侵入岩带控制着区内钨锡矿产的分布;中部古尔嘎一带奥陶系祁漫塔格群、阿尔金和碧云山两大断裂的次一级断裂,以及华力西期侵入岩带控制着铜、金矿产的分布;西部黑山—吐拉一带金水口群与碧云山断裂的次一级构造及东西向展布的华力西期岩浆岩带控制着区内铜、金矿产的分布。成矿带内划分了5个找矿靶区。近年,在各靶区内钨、锡、金、铜以及多金属矿产的地质找矿成果显著,先后发现了以白干湖钨锡矿田为代表的一批矿床和有希望、有新突破的矿产地多处。该区有可能成为我国主要的矿产资源基地之一。

Geological Background and Potentiality Analysis of Baiganhu Metallogenic Belt in East Kunlun, Xinjiang

Baiganhu metallogenic belt,located in the south part of Tarim basinNorth China plate（I） and the south magin of Qaidam minilandmass（II）,is affiliated to Qimantage Galedonian fold system.The specificity of the ores and the geological background in the region shows obviously.That is,in the Yaziquan area,the east of the region,the mictite belt is taking control of the distribution of copper,gold,iron and polymetallic ores;in the middle-east region,the distribution of tungsten and tin ores is controlled by the Baiganhu-Heishan lower Proterozoic Jinshui group,the Silurian Baiganhu formation and the secondary structure Baiganhu fault of the Altun discordogenic fault and the northeast-extended Galedonian-Variscan irruptive rock belt;in Guerga area of the middle region,the distribution of copper and gold ores is controlled by the Ordovician Qimantage group,the secondary faults of both Altun and Kunzhong major faults and the Variscan irruptive rock belt;in Heishan-Tula area of the west region,the distribution of copper and gold ores is controlled by Jinshuikou group,the secondary faults of Kunzhong faults and the W-E extended Variscan magmatite belt;and then in the metallogenic belt,there have been divided into five metallogenic prospect districts.In recent years,tungsten,tin,gold,copper and polymetallic ores,have been found out in each prospec district;and an amount of deposits,represented by Baiganhu tungsten-tin ore field,and prospective occurrences,which are hopeful to make breakthrough,have been discovered in succession.These ore-finding fruits have made the region will be one of the prospective and major mineral resources foundations in our country.