新疆哈密市黄山基性-超基性岩带铜镍矿床地质特征及矿床成因
Geological Features and Metallogenesis of Cu-Ni Deposit in Basic-to-Ultrabasic Zone of Huangshan, Hami Area
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摘要: 黄山基性-超基性岩带铜镍矿床为东天山重要铜镍成矿带,受近东西向康古尔韧性剪切带控制,分布有黄山西、黄山东和香山3个中—大型铜镍矿床。矿体赋存于华力西晚期贫硅、贫碱、富镁铁超基性岩体中下部及相变部位,主要为隐伏矿体,呈板状、透镜状,成群分布。主要含镍钴金属硫化物为镍黄铁矿和紫硫镍矿,含铜矿物为黄铜矿。铜镍矿体与基性-超基性岩体紧密伴生,为同一母岩浆——上地幔岩浆上升侵位、结晶和重力分异之产物,属典型的岩浆熔离—贯人式铜镍矿床。Abstract: The Cu-Ni deposit in Huangshan basic-to-ultrabasic complexs confined to the EW Kanggur ductile shear zone is an important Cu-Ni metallogenic belt of East Tianshan Moutains.It includes three medium-large sized Cu-Ni deposits as West Huangshan,East Huangshan and Xiangshan.The ore bodies locating in the middlelower and phase change positions of ultrabasic rock body is poor in silicon and rich in iron,magnesium in late Variscan,which are generally concealed,platy,lenticular and distributed in groups.The ore bodies are mainly composed of metal sulfides exiting as pentlandite,violarite,and copper ores dominated by chalcopyrite.The Cu-Ni deposit related to basic-ultrabasic rock body is a product of ascending and emplacement of a common parental magma-upper mantIe magma,which is a tipical magmatic liquation-injection Cu-Ni deposit.
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