摘要
黑熊沟东钼金多金属矿位于伯喀里克—香日德印支期金、铅、锌(铜、稀有、稀土)金属成矿带(Ⅲ)。矿区脆性断裂及节理构造为主要的导矿、容矿构造。区内侵入岩较发育,已发现的矿体与晚石炭世中—粗粒斑状二长花岗岩密切相关,矿体多呈条带状、脉状或侵染状展布。结合该矿床地质及物化探工作成果,在分析区域地质背景及矿区地质特征的基础上,详细讨论了矿体特征、矿床成因及控矿因素。研究表明:(1)矿区矿化呈面型分布,具有同心环状分带特征,达到最低工业品位的元素有Au、Pb、Mo,达到边界品位的元素为Ag,其余成矿元素为Cu、Zn,区内矿化为细脉浸染型,主要产于次级裂隙中,少量产于裂隙中的石英脉中,以硫化物或氧化物的形式体现;(2)矿区非金属矿物主要为石英、长石及云母,岩性主要为斑状二长花岗岩,矿区中部有石英闪长岩分布;(3)矿床成因为斑岩型及中—低温热液构造蚀变岩型矿床;(4)成矿有利区域为晚石炭世侵入岩与古元古代变质地层的接触带及附近,重点成矿部位为叠加断裂带及两侧伴生的节理带或次级断裂带,NE、NW走向的节理带或次级断裂带为最重要的储矿空间。在上述分析的基础上,进一步分析认为,矿区地层、蚀变、地球物理异常及地球化学异常为重要的找矿标志。
East Heixionggou Mo-Au polymetallic deposit is located in the Bokalike-Xiangride Indosinian gold, lead, zinc （ copper, rare metal element and rare earth elements） metallogenicbelt （ Ⅲ ）. The brittle fractures and joint structures are the main ore-transmitting structures and ore-hosting structures of the mining area. the intrusive rock in the mining area is well developed, the ore-bodies that have found are closely related to the Late Carboniferous medium-coarse porphyritic monzonitic granite in the mining area. The ore-bodies in the mining area are distributed with banded, vein ore infection shapes. Combing with some related geological working results and geophysical and geochemical working results of the deposit, based on analyzing the regional geological background and the geological characteristics of the mining are- a, the ore-bodies characteristics, ore-controlling factors and prospecting indicators are discussed in detail. The study results show that：（1）mineralization in the mining area is distributed with facial shape, the con- centric zoning characteristics of the mineralization is significant, the grades of Au, Pb and Mo are reached to the lowest industrial grade, the grade of Ag is reached to cutoff grade, the other metallogenic elements of the mining area are Cu and Zn, the mineralization of the mining area is belongs to veinlet disseminated type mineralization ,and they are mainly distributed in secondary fractures,a small amount of them is occurred in the quartz vein in fractures with the formation of sulphide or oxide;（2）the non-metallic minerals of the mining area are mainly for quartz,feldspar and mica,the lithology is mainly for porphyritic monzo- nitie granite, the quartz diorite is distributed in the central of mining area ;（3）the deposit genesis is belongs to porphyry type deposit and medium-low temperature hydrothermal tectonic altered rock type deposit ;（4） the metallogenic favorable area of the mining area is the contact zone and its nearby area is Late Carbonif- erous intrusive rock and Paleoproterozoie metamorphic strata,the key metallogenic area is fault belt superposition and the associated joint belts or secondary fault belts developed on the both sides of the fault belts,NE-direetion and NW-direction joint belts or secondary fault belts are the most important ore-hosting spaces. Based on the above analysis results, the further analysis results show that the strata, lithology, alteration,geophysical anomaly and geochemical anomaly can be regarded as the favorable prospecting indicators of the mining area.
出处
《现代矿业》
CAS
2017年第5期31-35,共5页
Modern Mining
关键词
钼金多金属矿
区域地质背景
地质特征
矿床成因
控矿因素
找矿标志
Mo-Au polymetallic deposit, Regional geological background, Geological characteristics, Deposit genesis, Ore-controlling factor, Prospecting indicator
