摘要
贵州天柱大河边超大型喷流沉积型重晶石矿床位于湘西-黔东南前陆隆起之雪峰-武陵逆冲褶皱带内,赋存于留茶坡组中上部的硅质碎屑岩地层中,重晶石矿床的北西边界为坪地断裂F1。为查明F1断裂对重晶石矿层破坏及保存情况,进一步指导深部及外围找矿勘查工程部署,本文通过野外地质调查、音频大地电磁测深(AMT)并结合以往勘查成果,针对天柱大河边重晶石矿床坪地断裂F1开展系统研究,鉴别断层性质并探讨其对矿层的改造影响。结果表明,坪地断裂F1为成矿后断裂,具逆-右行平移性质,其在圭禄山地段错断了含矿岩系及重晶石矿层,垂直断距700~800 m,永发地区(钻孔ZK1205)至断裂F1下盘边界区域,含矿岩系留茶坡组内仍赋存厚大重晶石矿层,找矿潜力巨大。
The Dahebian giant SEDEX-type barite deposit in Tianzhu County,Guizhou Province,is located in the Xuefeng-Wuling thrust fold belt of the Western Hunan-Southeastern Guizhou foreland uplift.The batite orebody is hosted in the siliceous clastic rock stratum in the middle and upper parts of the Liuchapo Formation.The Pingdi fault(F1)is the northwest boundary of the barite deposit.In order to find out the damage and preservation situations of the barite orebody caused by the F1,and to further guide the deployment of ore-prospecting and exploration projects in the deep part and periphery of the deposit,in this paper,through the field geological survey and the audio-frequency magnetotelluric sounding(AMT)survey,and combined with previous exploration results,we have systematically studied the F1 in the Dahebian giant barite deposit for identifying its nature and exploring its effect on transformation of the orebody.The results show that the F1 is a post-ore fault with the thrusting-dextral translation property.It had cutt off the ore-bearing rock series and barite orebody,with vertical faulting distances varying from 700m to 800m in the Guilushan oreblock.From the Yongfa area(Borehole ZK1205)to the F1 footwall boundary,there is still a thick barite orebody in ore-bearing rock series of the Liuchapo Formation,which is of great ore-prospecting potential in this area.
作者
刘明民
谢兴友
苏特
潘文
王家俊
冯开友
刘灵
石睿
饶红娟
罗邦良
LIU Ming-min;XIE Xing-you;SU Te;PAN Wen;WANG Jia-jun;FENG Kai-you;LIU Ling;SHI Rui;RAO Hong-juan;LUO Bang-liang(Geology Team 103,Bureau of Geology and Mineral Exploration and Development Guizhou Province,Tongren 554300,China;School of Earth Resources,China University of Geosciences,Wuhan 430074,China;Engineering Technology Innovation Center of Mineral Resources Explorations in Bedrock Zones,Ministry of Natural Resources,Guiyang 550081,China;Geology Team 101,Bureau of Geology and Mineral Exploration and Development Guizhou Province,Kaili 556000,China)
出处
《矿物学报》
CAS
CSCD
北大核心
2023年第6期833-840,共8页
Acta Mineralogica Sinica
基金
贵州省找矿突破战略行动重大协同创新项目(编号:黔科合战略找矿[2022]ZD004)
贵州省重大科技成果转化项目(编号:黔科合成果[2022]重点003)
贵州省科技平台及人才团队计划(编号:黔科合平台人才[2018]5618)
贵州省地质矿产勘查开发局科研项目(编号:黔地矿科合[2021]24号)。
关键词
重晶石
天柱
成矿后断裂
改造作用
大河边
barite
Tianzhu
post-ore fault
transformation effect
Dahebian
