贵州天柱大河边重晶石矿区F1断层构造特征及其对成矿的控制  

Structural characteristics of the F1 fault and its control on Ba mineralization in the Dahebian barite deposit,Tianzhu County,Guizhou Province

作　　者：李永刚[1] 杨光忠[1] 王家俊[2] 饶红娟[1] 刘灵[1] 石睿[1] 冯开友 LI Yong-gang;YANG Guang-zhong;WANG Jia-jun;RAO Hong-juan;LIU Ling;SHI Rui;FENG Kai-you(101 Geology Party,Bureau of Geology and Mineral Exploration and Development,Guizhou Province,Kaili Guizhou 556000,China;103 Geology Party,Bureau of Geology and Mineral Exploration and Development,Guizhou Province,Tongren Guizhou 554300,China)

机构地区：[1]贵州省地质矿产勘查开发局一0一地质大队,贵州凯里556000 [2]贵州省地质矿产勘查开发局一〇三地质大队,贵州铜仁554300

出　　处：《矿物学报》2023年第6期824-832,共9页Acta Mineralogica Sinica

基　　金：贵州省科技计划“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);贵州省地质矿产勘查开发局项目(编号:黔地矿科合[2021]24号)。

摘　　要：贵州天柱大河边地区早寒武世沉积层状重晶石矿,普遍认为符合海底喷流沉积成矿的特征,但对重晶石矿层厚度分布规律及其喷流来源通道位置或控制因素等关键问题的研究较为薄弱。本文通过分析重晶石矿层厚度等值线发现,重晶石成矿与F1断层关系密切。通过地质调查、勘探剖面和物探成果等的综合分析表明,F1断层由导矿构造(Fd)和逆断层(Fn)等耦合组成,至少经历3个阶段的演化,其中早期或为基底断层,并构成重晶石矿的喷流来源通道及主要控制因素。进一步分析认为,重晶石矿应相对集中于断层两侧,沿F1断裂构造带及其两侧附近范围,是重要的成矿有利条件和找矿潜力靶区。The geneisi of the Dahebian barite deposit,whose ores are hosted in the early Cambrian layered sedimentary rocks in the Dahebian area of Tianzhu County,Guizhou Province,is generally believed to be consistent with the viewpoint of the SEDEX type.However,researches on the thickness distribution regularity of barite ore layers and the location or controlling factors of the exhalation source channel of the deposit are limited and relatively poor.Through analyzing the thickness contour of barite ore layers of the deposit,it is found that the barite mineralization was closely related to the F1 fault.Through comprehensive analysis of geological surveys,exploration profiles,and geophysical exploration results,it is shown that the F1 fault is coupling one consisting of a ore-conducting structure(Fd)and a reverse fault(Fn).It had undergone at least three stages of faulting evolution.Especially,the early stage fault could be the basement fault constituting the exhalation source channel and main ore-controlling factor of the Dahebian barite deposit.Further analysis suggests that ores of the barite deposit should be relatively concentrated in two sides of the fault.Thus,the F1 fault structure zone and its vicinity,which had important favorable condition for mineralization,are potential targeting areas for the barite ore-prospecting.

关 键 词：导矿构造 矿层厚度等值线立体图 喷流通道 早寒武世 扬子板块 

分 类 号：P613[天文地球—矿床学]