黑龙江省袁家屯铅锌矿床地质特征及找矿方向

发布时间：2018-03-17 03:08

本文选题：五常市　切入点：铅锌矿床　出处：《吉林大学》2015年硕士论文　论文类型：学位论文

【摘要】：袁家屯铅锌矿床位于小兴安岭—张广才岭铁铜有色金属成矿带的南部、滨东矿化集中区内，其大地构造位置为小兴安岭-松嫩地块东缘与伊春-延寿地槽褶皱系西缘的接壤处，该区是热液型、矽卡岩型矿床的重要成矿地带，特殊的构造环境及相关的岩浆活动，为区内铜、铅、锌、铁多金属矿床的形成提供了有利条件。袁家屯铅锌矿床为近年来发现并勘查的小型矿床，二叠系下统土门岭组地层为区内多金属矿体的主要赋矿围岩，，燕山晚期花岗闪长岩成矿作用在区内发育。矿体赋存于土门岭组大理岩与花岗闪长岩接触交代形成的矽卡岩外带内。受北北西向袁家屯断裂构造的影响，在区内形成一条北西～南东向矿化蚀变带,在该矿化带内产出铅锌工业矿体八条。赋矿部位是接触带矽卡岩及接触带外侧围岩的层间构造破碎带。矿体种类有细脉浸染状、脉状、扁豆状。主要金属矿物为方铅矿、闪锌矿、黄铜矿、黄铁矿等。矿床成因类型为接触交代矽卡岩型。研究认为矿区的土门岭组地层构成铅锌成矿的重要地质条件，土门岭组为铜铅锌铁成矿提供了部分物质来源和重要成矿环境。燕山期花岗闪长岩与成矿关系密切，岩浆作用的巨大热量是促使金属元素溶解于介质并迁移的主要能源。岩体与地层接触带构造、土门岭组碳酸盐地层的层间破碎带构造，构成区内铜铅锌铁成矿的重要控矿条件，控制铅锌矿化蚀变带及矿体的形态、规模、产状及空间展布特征。对区域成矿地质条件和找矿标志研究结果表明，该区具有较好进一步找矿潜力，具有找寻中型CuPbZn矿床的良好前景。根据研究区的地质背景，认为在矿区周边具有寻找相同成因类型矿床的潜力。
[Abstract]:The Yuanjiatun lead-zinc deposit is located in the southern part of the Xiaoxinganling-Zhangguangcailing iron-copper metallogenic belt. The tectonic location of the deposit lies in the eastern margin of the Xiaoxinganling-Songnen block and the western margin of the Yichun Yanshou geosyncline fold system. This area is an important metallogenic zone of hydrothermal and skarn type deposits. The special tectonic environment and related magmatic activities provide favorable conditions for the formation of copper, lead, zinc and iron polymetallic deposits in the region. The Yuanjiatun lead-zinc deposit is a small deposit discovered and explored in recent years. The Lower Permian Tumenling formation is the main host rock of the polymetallic ore body in the area. The late Yanshanian granodiorite mineralization developed in the area. The orebody occurred in the skarn outer belt formed by the contact metasomatism of marble and granodiorite in the Tumenling formation, and was influenced by the NNW Yuanjiatun fault structure. There are eight lead-zinc industrial orebodies formed in the zone. The ore-hosting sites are skarn in the contact zone and interlayer structural fracture zone in the surrounding rock outside the contact zone. The types of orebodies are vein-impregnated, and the orebodies are composed of two types: skarn in the contact zone and interlayer structural fracture zone in the surrounding rock on the outer side of the contact zone. The main metal minerals are galena, sphalerite, chalcopyrite, pyrite, etc. The genetic type of the deposit is contact metasomatic skarn. It is considered that the strata of the Tumenling formation in the mining area constitute the important geological conditions for lead-zinc mineralization, and the Tumenling formation provides some material sources and an important metallogenic environment for the copper-lead-zinc-iron mineralization. The Yanshanian granodiorite is closely related to the mineralization. The great heat of magmatism is the main energy to cause metal elements to dissolve in the medium and migrate. The structure of contact zone between rock and strata and the structure of interlayer fracture zone in carbonate strata of Tumenling formation constitute the important ore-controlling conditions of copper-lead-zinc-iron mineralization in this area. The shape, scale, occurrence and spatial distribution of the lead-zinc mineralization alteration zone and orebody are controlled. The results of the study on regional metallogenic geological conditions and ore-prospecting markers show that this area has a good potential for further prospecting and a good prospect for finding medium-sized CuPbZn deposits. According to the geological background of the study area, It is considered that there is the potential to look for the same genetic type deposit around the ore area.
【学位授予单位】：吉林大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P618.4

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