基于新疆鄯善县云海铜镍矿认识探讨通道型铜镍矿成矿模型

Discussion on Metallogenic Model of Channel-Type Copper-Nickel Deposit Based on the Understanding of Yunhai Copper-Nickel Deposit in Shanshan County,Xinjiang

基于云海铜镍床顶部存在特富矿体、岩相分带呈桶状、矿体穿层-穿岩相、岩石变形而硫化物不变形等非典型特征,从矿床地质特征、岩相特征、矿体特征等方面入手,采用岩石学、矿物学对云海铜镍矿成矿模型进行探讨,并对矿物结晶温度与超基性岩分异相进行研究。通过对比分析,建立5种岩浆通道型铜镍硫化物模型,总结了与5种通道相应的岩相分带及成矿特征和代表矿床。据模型预测云海铜镍矿岩浆房位于其西北部,岩体由NNW向侵入SE向。岩体NNW向接近原始岩浆房位置,预测存在厚大的块状富矿体。

Based on the existence of extra-rich ore bodies on the top of the Yunhai copper-nickel deposit,the barrellike lithofacies zoning,the ore body interlayer-through lithofacies,rock deformation without sulfide deformation,etc.,from the geological characteristics of the deposit,lithofacies,Starting with the characteristics of the ore body and the relationship between them,petrology and mineralogy are used to discuss the metallogenic model of the Yunhai copper-nickel deposit,and the mineral crystallization temperature and ultrabasic rock differentiation phase are analyzed and studied through comparative analysis.,Established five magma channel copper-nickel sulfide models,summarized the corresponding lithofacies zoning and metallogenic characteristics and representative deposits of the five channels,and used the model to predict that the magma chamber of the Yunhai copper-nickel deposit is located in the northwest of the magma.The direction of intrusion is from NNW to SE,and the NNW direction of the rock mass is close to the original magma chamber.It is predicted that there will be thick massive ore bodies.