J4 ›› 2011, Vol. 41 ›› Issue (6): 1676-1688.

• 兴蒙造山带及邻区中生代岩浆活动与金属成矿作用专辑 • 上一篇    下一篇

黑龙江多宝山矿集区成矿规律与找矿方向

赵元艺1|王江朋2|赵广江3|崔玉斌2   

  1. 1.中国地质科学院矿产资源研究所/国土资源部成矿作用与资源评价重点实验室|北京100037；
    2.中国地质大学地球科学与资源学院|北京100083；3.黑龙江省第四地质勘察院|哈尔滨150036
  • 收稿日期:2011-07-08 出版日期:2011-11-26 发布日期:2011-11-26
  • 作者简介:赵元艺(1966-)|男|甘肃甘谷人|研究员|主要从事矿床学与地球化学研究|Tel:010-68999084|E-mail:yuanyizhao2@sina.com
  • 基金资助:

    国家重点自然科学基金项目（41030421）

Metallogenic Regularity and Prospecting Direction of Duobaoshan Ore Field|Heilongjiang Province,China

ZHAO Yuan-yi1,WANG Jiang-peng2,ZHAO Guang-jiang3,CUI Yu-bin2   

  1. 1.Institute of Mineral Resources, CAGS/MRL Key Laboratory of Metallogeny and Mineral Assessment,Beijing100037,China；
    2.School of the Earth Sciences and Resources, China University of Geosciences,Beijing100083,China；
    3.Fourth Geological Exploration Institute of Heilongjiang Province, Harbin150036,China
  • Received:2011-07-08 Online:2011-11-26 Published:2011-11-26

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摘要：

多宝山斑岩铜矿位于黑龙江省嫩江县境内，为我国北方重要的斑岩型铜矿床之一。在包括多宝山矿床在内的矿集区范围内资源丰富，有斑岩型铜（钼）矿床、矽卡岩型铁铜矿床以及热液型金矿床。在系统收集分析前人资料的基础上，查明矿集区成矿规律与找矿方向,认为复活了的基底构造对铜元素的迁移、富集和贫化起着重要的控制作用。矿集区北西段为矽卡岩型铜铁矿矿床与热液型铜钼矿，中部为斑岩型铜钼矿，南东段为热液型金矿。加里东期斑岩铜矿是矿集区最早形成的矿床，其后的海西期与燕山期构造岩浆活动对矿田范围的矿床起到保护以及促进新矿床的形成作用。矿集区矿床（点）严格受北西向弧形构造控制，围岩为多宝山组与铜山组中酸性火山岩。在北西向弧形构造带外侧存在一个面积达228 km2的铜的降低场;此外，在矿带周围、矿体上盘和矿体前缘的安山岩中均出现了铜的降低场，成矿物质铜与金主要由围岩地层提供。铜矿床的硫同位素显示幔源的特点。成矿由早期到晚期，热液以岩浆水为主变为以雨水为主。争光金矿成矿流体主要为岩浆水与天然水的混合。三矿沟地区、育宝山地区等已经发现斑岩铜矿的地区，应该注意热液型金矿的找矿。铜山与小孤山地区为斑岩铜矿的重点找矿地区，在争光地区适宜开展铅锌矿产的找矿工作。

关键词: 矿集区, 成矿规律, 找矿方向, 多宝山

Abstract:

Duobaoshan porphyry copper deposit, located in Nenjiang, Heilongjiang Province, is one of the most important porphyry copper deposits in the North China. There are abundant mineral resources in this district, mainly including porphyry copper (molybdenum) deposit, skarn iron-copper deposit and hydrothermal gold deposit.Based on systematic analysis of the previous data, the metallogenetic regularity and prospecting direction in this district are defined. It was thought that the reactive basement structure played an important role in transportation, enrichment and dilution of the copper. The deposit types in weastern, middle and southeastern parts of the district are skarn iron-copper deposit and hydrothermal copper-molybdenum deposit, porphyry copper-molybdenum deposit as well as hydrothermal gold deposit, respectively. Caledonian porphyry copper deposit is the primary type in this district, following Hercynian and Yanshanian tectonic and magmatic process destroyed, preserved and regenerated the deposits in the district. Deposits and their occurrences are controlled strictly by the NW arc structure and hosted in the intermediate and acid volcanic rock of the Duobaoshan Formation and Tongshan Formation. There occurs a low-value copper anomaly field locates outside of the NW arc structure, with area of 228 km2, such low-value copper anomaly fields are also defined in andesite around the mineralization zones, upper wall and front area of the ore bodies. Such metallogenic elements as Cu and Au are mainly provided by the country rocks. The S isotopic composition of the copper deposit shows mantle-derived features. From the early to late stage of the metallogenic process, the hydrothermal fluids changes from magmatic to meteoric water. The ore-forming fluid in Zhengguang deposit is mainly a mixture of magmatic water and natural water. It is suggested that special attention should be paid to the hydrothermal gold mineralization in Sankuanggou and Yubaoshan porphyry copper deposits. Porphyry copper deposit is the main prospecting type in Tongshan and Xiaogushan district, while in the Zhengguang district, lead-zinc mineralization is the main prospecting target.

Key words: ore district, metallogenic regularity, ore-prospecting direction, Duobaoshan

中图分类号: 

  • P618.41
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