桂东北地区岔江口铅矿床地质与地球化学特征及成因探讨  

Geological and geochemical characteristics and genesis of chajiangkou lead deposit in Northeast Guangxi

作　　者：丁超超 DING Chao-chao(nuclear geology brigade of Guangxi Zhuang Autonomous Region,Guilin 541213,China)

机构地区：[1]广西壮族自治区三一〇核地质大队,广西桂林541213

出　　处：《世界有色金属》2022年第8期95-97,共3页World Nonferrous Metals

摘　　要：岔江口铅锌矿位于南华活动带海洋山凸起的中心部位-海洋山岩体与奥陶系地层内外接触带上,是桂东北海洋山铅锌成矿带的重要组成部分。广西运动使该区褶皱窿起构成褶皱基底,伴随有强烈的酸性岩浆活动,形成海洋山花岗岩体。广西运动之后,转化为较为稳定的泥盆纪—中三叠世的沉积盖层,泥盆系普遍呈角度不整合于前泥盆系之上,超覆现象明显。印支运动使沉积盖层发生褶皱窿起,形成海洋山凸起。本文通过铅锌矿结合伴生矿物微量元素地球化学异常进行分析,存在3条化探异常带:①黑雨灵王异常带、②田口箐异常带、③中箐异常带。并通过地表槽探、深部钻探、坑探等工程验证。局部富集形成工业矿体。Chajiangkou lead-zinc deposit is located in the central part of Haiyangshan uplift in Nanhua active belt-the internal and external contact zone between Haiyangshan rock mass and Ordovician strata.It is an important part of Beihai Yangshan lead-zinc metallogenic belt in Eastern Guangxi.The Guangxi movement made the fold hole in this area to form the fold basement,accompanied by strong acidic magmatism,forming the Haiyangshan granite body.After the Guangxi movement,it was transformed into a relatively stable Devonian Middle Triassic sedimentary cover.The Devonian system is generally angular unconformity on the pre Devonian system,and the overlap phenomenon is obvious.The Indosinian movement caused the sedimentary caprock to fold and hole up,forming the oceanic mountain bulge.Based on the analysis of trace element geochemical anomalies of lead-zinc deposits and associated minerals,there are three geochemical anomaly zones:①heiyulingwang anomaly zone,②tiankouqing anomaly zone and③Zhongqing anomaly zone.It has been verified by surface trenching,deep drilling,pit exploration and other projects.Local enrichment forms industrial ore bodies.

关 键 词：桂东北海洋山铅锌成矿带 岔江口铅锌矿 地球化学异常 工业矿体 

分 类 号：P618.66[天文地球—矿床学]