白音诺尔-双尖子山-浩布高多金属矿集区基本地质特征

Basic geological features of polymetallic deposit concentration areas in Baiyinnuoer-Shuangjianzishan-Haobugao

  • 摘要: 大兴安岭地区是中国东部重要的成矿集中区之一,研究区为该区最具代表性的铅锌-铜-钼-锡-银-金集中区.结合研究区成矿的地质等主要特征,将主要多金属矿床区域成矿系统划分为2个成矿系统.即晚古生代-中生代斑岩-热液成矿系统和中生代构造-热液成矿系统.进而讨论了各成矿系列的主要矿产类型、地质特征、成因等.总结得出研究区成矿规律为:① 从含矿地层上看,矿床含矿围岩主要为二叠系、侏罗系酸性火山岩及次火山岩;② 从构造控矿上看,复背斜轴部的虚脱带、北东向与北西向断层交汇处是赋矿的有利场所;③ 从成矿时代上看,印支期和燕山期是重要成矿阶段;④ 从找矿类型看,主要产出与火山-侵入杂岩有关的矽卡岩型-斑岩型-浅成热液型多金属矿床,可能发现其他新的矿床类型.

     

    Abstract: Chinese Da Hinggan Mountains is one of the important metallogenic clusters of eastern China. It is the most representative in the area of lead and zinc-copper-molybdenum-silver-gold clusters. According to the geological and other main characteristics of the mineralization in the study area, the main polymetallic ore deposit area was divided into two metallogenic systems: the late Paleozoic-Mesozoic porphyry-hydrothermal mineralization system and Mesozoic tectonic hydrothermal metallogenic system. Types of main minerals, geological characteristics and the ore-forming genesis were further discussed. Metallogenic regularities are obtained as follows:① From the ore formation, surrounding rock of ore deposit are mainly Permian, Jurassic acidic volcanic rocks and volcanic rocks; ② From the tectonic control mine, the collapse anticline axis belt, north east and north west fault interchange is the good place of ore; ③ From the metallogenic epoch, period of indosinian and yanshanian is an important metallogenic stages; ④ From the prospecting type, the main output are volcano-intrusive complex related skarn type, porphyry type-epithermal type polymetallic deposit, other new type of ore deposits may also be found.

     

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