东昆仑地区夏日哈木铜镍矿床成矿模式及找矿方向

发布时间：2018-03-28 03:00

本文选题：夏日哈木　切入点：铜镍矿　出处：《地质通报》2017年07期

【摘要】：通过对夏日哈木铜镍矿成矿地质背景、矿床地质特征的研究,总结了夏日哈木铜镍矿床成矿模式。认为夏日哈木岩体群处于昆中岩浆弧带,晚志留世—早泥盆世处于陆-陆碰撞阶段伸展环境,是夏日哈木超大型镍-钴硫化物矿形成的先决条件;幔源岩浆深部熔离和向上贯入是成矿关键,熔离成矿过程中地壳混染也是一个必须条件,后期构造控制了矿体的定位以及形态。该区成矿经历了橄榄石和斜方辉石成矿期、黄铜矿和镍黄铁矿成矿期和镍华和孔雀石表生氧化期三期。据此提出下一步找矿方向,区域上昆中岩浆弧带是主要的成矿区带,矿区Ⅰ和Ⅲ号岩体中间是深部最有利的验证位置,外围拉宁灶火异常是验证的重要靶区。
[Abstract]:Based on the study of the metallogenic geological background and geological characteristics of the summer Hamu copper-nickel deposit, the metallogenic model of the summer Hamu copper-nickel deposit is summarized. It is considered that the summer Hamu rock mass group is located in the central Kun magmatic arc zone. The late Silurian early Devonian extensional environment in the continental continent collision stage is a prerequisite for the formation of the ultralarge nickel-cobalt sulfide deposits in summer Hamu, and the deep melting and upward penetration of mantle magma are the key to the mineralization. Crustal mixing is also a necessary condition in the process of melting and separation mineralization. The late tectonics controlled the location and morphology of the orebody. The ore-forming period of olivine and clinopyroxene occurred in this area. The metallogenic stage of chalcopyrite and nickel pyrite and the three stages of supergenetic oxidation of nickel and malachite. Based on this, it is suggested that the magmatic arc zone is the main metallogenic zone in the middle of Shangkuncun region. The center of No. 1 and No.3 rock mass in the mining area is the most favorable verification position in depth, and the peripheral Lanning focal fire anomaly is an important target area for verification.
【作者单位】：青海省地质矿产勘查开发局;青海省地质调查院;青海大学;
【基金】：国土资源部公益性行业科研专项《东昆仑地区多金属成矿系列与找矿突破》(编号:201211037) 青海省科技厅项目《青海青藏高原北部地质过程与矿产资源重点实验室》(编号:2014-Z-Y06)和《柴达木盆地南北缘成矿系统与勘查开发示范》(编号:2016-SF-A3)
【分类号】：P618.41

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