Cu-Ni mineralization characteristics and metallogenetic conditions of Weidong rock body in Funing, Yunnan Province

The formation of Cu-Ni deposits of Weidong rock body directly related to the metallogenetic specialization of Anding type basic rock, such as, magma differentiation , chemical composition, pattern of intrusion, physical and chemical conditions of differentiation, postmagmatic mineralization and contact metasomatism. . The parent rock of mineralization of the deposits is the basic ultrabasic rock, which usually have obvious differentiation phenomena. From the outside of the rock body to the inner, the parent rock can be divided into compact diabase lithofacies, medium fine grained olivine gabbro norite lithofacies, medium grain norite gabbro lithofacies, medium grain diorite lithofacies. Orebodies are located at the middle-lower part of Weidong rock body, and the favorable wall rock for the ore deposits are olivine norite gabbro and norite gabbro, among which industrial orebodies mainly occurred in olivine-bearing lithofacies. The genesis of the deposit belongs to liquidation-type Cu-Ni deposit.