摘要
周家坪金矿是近年来在鄂南地区发现的一处小型金矿,研究在普查工作的基础上,总结了矿区的成矿地质特征并探讨矿床成因,指出了下一步找矿方向。结果表明,该矿床位于大湖山岩体北缘,矿区地层出露为寒武系华严寺组—志留系新滩组,缺失奥陶系宝塔组和黄泥岗组。矿区共有近东西(F1)、北东(F2、F5、F6)和北西向(F3、F4)3组断裂,近东西向顺层断裂F1为区域储矿构造,北东向断裂F6为区域导矿构造,F1和F6断裂与成矿关系密切。矿体呈脉状产于奥陶系宁国组、留咀桥组及奥陶系—志留系龙马溪组的地层中,受断裂控制明显,含矿岩性为硅化碎裂岩、含石英脉页岩、含石英脉粉砂岩和含方铅矿石英脉,并伴有硅化、黄铁矿化、去碳酸盐化和铅锌矿化,矿石矿物为自然金。初步分析认为,矿床属石英脉型金矿,矿区南部的大湖山岩体和区域中较老的地层可能为本区成矿提供了热量和物质。已发现的矿体深部、F6断裂通过下菜园HT3异常部位是成矿有利地段,建议开展下一步勘查工作。
Zhoujiaping Gold Mine is a small gold mine discovered in the southern part of Hubei Province in recent years.Based on the general survey work,the geological characteristics of the mineralization in the mining area were summarized and the genesis of the deposit was discussed,and the direction of the next step of mineral exploration was pointed out.The results show that the deposit is located on the northern margin of the Dahu Mountain rock mass.The exposed strata in the mining area are the Cambrian Huayan Temple Formation-Silurian Xintan Formation,while the Ordovician Baota Formation and Huangnigang Formation are missing.There are three groups of faults in the mining area,namely the near-east-west(F1),northeast-east(F2,F5,F6),and northeast-northwest(F3,F4)faults.The near-east-west longitudinal fault F1 is a regional ore-storing structure,while the northeast-east fault F6 is a regional ore-guiding structure.The F1 and F6 faults are closely related to mineralization.The ore body is vein-shaped and occurs in the strata of the Ningguo Formation,Liujuqiao Formation of the Ordovician and the Longmaxi Formation of the Ordovician-Zhiliu System.It is significantly controlled by faults.The ore-bearing lithologies are silicified fractured rocks,quartz-bearing shale,quartz-bearing siltstone and gallead-bearing quartz veins,accompanied by silicification,pyritization,decarbonization and lead-zinc mineralization.The ore mineral is natural gold.Preliminary analysis suggests that the deposit belongs to the quartz vein type gold mine.The Dahu Mountain rock mass in the southern part of the mining area and the older strata in the region may have provided heat and materials for the mineralization in this area.The deep part of the discovered ore body and the F6 fault passing through the HT3 anomaly in Xiacaiyuan are favorable sections for mineralization.It is recommended to carry out the next exploration work.
作者
李源
尹近
陈卓
刘峰
李晶
刘红亮
佘建超
张丽雅
李巍
LI Yuan;YIN Jin;CHEN Zhuo;LIU Feng;LI Jing;LIU Hongliang;SHE Jianchao;ZHANG Liya;LI Wei(The Fourth Geological Team of Hubei Geological Bureau;Hubei Key Laboratory of Resources and Ecological Environment Geology;Hubei Geological Exploration Fund Management Center)
出处
《现代矿业》
2025年第8期171-177,共7页
Modern Mining
基金
湖北省自然资源厅2020年度湖北省地质勘查基金项目(编号:[2020]6号)。
关键词
周家坪金矿
石英脉型
成矿地质特征
找矿方向
Zhoujiaping Gold Mine
quartz vein type
geological characteristics of mineralization
prospecting direction
