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潘彤,李善平,赵呈祥,陈静,金婷婷,林浩.东昆仑地区夏日哈木铜镍矿床成矿模式及找矿方向[J].地质通报,2017,(7):1276-1287.
东昆仑地区夏日哈木铜镍矿床成矿模式及找矿方向    点此下载全文
潘彤1  李善平2  赵呈祥1  陈静2  金婷婷2  林浩3
1. 青海省地质矿产勘查开发局, 青海 西宁 810001;
2. 青海省地质调查院, 青海 西宁 810012;
3. 青海大学, 青海 西宁 810016
基金项目: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)
DOI:
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。
关键词:夏日哈木  铜镍矿  成矿模式  找矿方向
Metallogenic model and prospecting direction of the Xiarihamu Ni-Cu sul-fide deposit in East Kunlun area    Download Fulltext
PAN Tong1  LI Shanping2  ZHAO Chengxiang1  CHEN Jing2  JIN Tingting2  LIN Hao3
1. Bureau of Geology and Mineral Exploration and Development of Qinghai Province, Xining 810001, Qinghai, China;
2. Qinghai Institute of Geological Survey, Xining 810012, Qinghai, China;
3. Qinghai University, Xining 810016, Qinghai, China
Fund Project:
Abstract:
      Based on a study of the metallogenic characteristics and condition as well as mechanism of the Xiarihamu Cu-Ni sulfide de-posit, the authors summed up the metallogenic model of the Xiarihamu Ni-Cu sulfide deposit. The authors hold that Xiarihamu mag-ma group was located in eastern Kunlun island arc magma zone, and that the collisional extension environment constituted the basic con-dition for the formation of the Xiarihamu superlarge Cu-Ni sulfide deposit during the Late Silurian-Early Devonian period. That con-stituted the prerequisite for the formation of the deposit and the key to the mineralization and the separation of sulfides as well as ore pulp injection. The crustal contamination of S played a very important role in forming Ni orebody. The orebodies are spatially controlled by faults. The metallogenic process of the Xiarihamu deposit can be divided into three stages, i.e., olivine and orthopyroxene metallogenic period, chalcopyrite and pentlandite metallogenic period, annabergite malachite and supergene oxidation stage. It is also pointed out that the regional key prospecting target is the central Kunlun magma arc zone, the area between Ⅰand Ⅲ rock bodies is the most favorable places for deep verification, and the Laningzaohuo anomaly in the periphery is an important target area for verification.
Keywords:Xiarihamu  Ni-Cu sulfide deposit  metallogenic model  prospecting direction
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