天山-兴蒙成矿域岩浆铜镍硫化物矿床地质特征和成矿动力学背景

GEOLOGICAL CHARACTERISTICS AND GEODYNAMICS OF TYPICAL MAGMATIC COPPER AND NICKEL DEPOSITS IN THE TIANSHAN-XINGMENG METALLOGENIC PROVINCE,CENTRAL ASIA

天山-兴蒙成矿域是中亚成矿域的重要组成部分,中亚造山带演化过程中,形成了大量的镁铁-超镁铁岩石和岩浆铜镍硫化物矿床,自西向东主要有菁布拉克、喀拉通克、黄山东和红旗岭等岩浆铜镍硫化物矿床,构成重要内生金属矿床富集区.含矿镁铁-超镁铁岩带成岩成矿时代由西至东逐渐变新,暗示古亚洲洋盆由西向东剪刀式构造迁移过程,其岩浆作用记录了中亚造山带构造演化过程.

Tianshan-Xingmeng mineralization belt is one of the most parts of Central Asia Orogenic metallogenic provin- ce.From late Paleozoic （Upper Carboniferous to Lower Permian） to Indosinian, the Central Asia oceanic subduction-accre- tion triggered the large-size mefic-ultramafic emplacement and associated with several magmatic Cu-Ni-PGE sulfide depo- sits （e.g.Kalatongke, Huangshan, huangshandong and Hongqiling）.These deposits occurred in the subduction-accretion isl- and setting that similar with Alaska-Ural type Cu-Ni-PGE deposits,rather than in the post-collision stage.