内蒙古查干诺尔铜矿区矿石特征及成因探讨

Characters and Genesis of the Chaganuoer Copper Deposit in Inner Mongolia

查干诺尔铜矿床产在西伯利亚板块和华北板块汇聚带附近,华力西晚期构造岩浆带内。成矿与早二叠世洋盆闭合,后碰撞高钾钙碱性花岗岩类岩浆演化晚期的钾质花岗岩有关。铜矿(化)体呈细脉浸染状产在钾质花岗岩的内外接触带内。铜矿石的主要金属矿物为黄铜矿、黄铁矿、闪锌矿、方铅矿等;化学组分以铜、钼、金、银、铅、锌为主。主要的矿化发生在热液期,围岩蚀变明显,有钾长石化、绢英岩化、高岭土化、青盘岩化等。铜矿形成在华力西晚期,属斑岩型铜矿床。

The Chaganuoer copper deposit is located near the assembly belt of Siberian plate and North China plate, and within the tectonic-magma belt of Late Variscan. The mineralization is related to the ocean basin closure in the Lower Permian, the moyite of the late magmatic evolution of the post-collision high-kalium granitoid. The copper orebody composed of the veinlet-disseminated ores, occuring in the endo- and exocontact zone of the moyite. The main ore minerals are chalcopyrite,pyrite,sphalerite and galena. The main chemical components are copper, molybdenum, gold, silver, lead and zinc. The chief mineralization is in the epithermal era. There are obvious alteration on the wall rock, and there are also potassic, phyllic, argillic and propylitic. The copper deposit formed in the Late Variscan, and belongs to porphyry copper deposit.