江西万安横江背萤石矿矿床成因及找矿标志  

The Genesis and Prospecting Criteria of Hengjiangbei Fluorite Deposit in Wan'an County,Jiangxi Province

作　　者：朱文韬 朱钦 ZHU Wentao;ZHU Qin(Ninth Geological Brigade of Jiangxi Geological Bureau)

机构地区：[1]江西省地质局第九地质大队

出　　处：《现代矿业》2023年第12期45-49,55,共6页Modern Mining

基　　金：江西省地质勘查基金项目(编号:20200040)。

摘　　要：为寻找中—大型萤石矿,对江西省万安县横江背萤石矿运用地质填图、槽探、钻探相结合的勘查技术手段,以查明萤石矿矿床地质特征、矿床成因,确定找矿标志。结果表明:横江背萤石矿为中型萤石矿床,矿石类型主要为萤石-石英型矿石,以角砾状贫矿石为主,次为条带状矿石,块状富矿石分布较少,呈零散透镜状分布;矿体呈脉状、透镜状产于北北东向白须脑—水草龙断裂带内,沿走向、倾向呈断续分布,膨缩现象明显,具分枝复合、尖灭再现特点;矿床成因类型属中低温热液充填交代型脉状萤石矿床;找矿标志为底-早寒武系牛角河组、中寒武系高滩组地层,北北东向大断裂及其次级断裂带,燕山期黑云母花岗岩,硅化及蛋白石化。加强成矿富集规律的研究,对区内找矿有现实的指导作用。In order to find medium-large fluorite deposits,the Hengjiangbei fluorite deposit in Wan′an County,Jiangxi Province was explored by means of geological mapping,trenching and drilling to find out the geological characteristics,genesis and prospecting criteria of fluorite deposits.The results show that the Hengjiangbei fluorite deposit is a medium-sized fluorite deposit.The ore type is mainly fluorite-quartz type ore,mainly brecciated lean ore,followed by banded ore,and massive rich ore is less distributed in a scattered lenticular distribution.The ore body is veined and lenticular in the NNE Baixunao-Shuicaolong fault zone.It is intermittently distributed along the strike and tendency.The expansion and contraction phenomenon is obvious,and it has the characteristics of branch recombination and pinch-out reproduction.The genetic type of the deposit belongs to the medium-low temperature hydrothermal filling metasomatic vein fluorite deposit.The prospecting criteria are the bottom-early Cambrian Niujiaohe Formation,the middle Cambrian Gaotan Formation,the NNE-trending large fault and its secondary fault zone,the Yanshanian biotite granite,silicification and protein petrochemical.Strengthening the study of metallogenic enrichment law has a practical guiding role in prospecting in the area.

关 键 词：横江背萤石矿 矿床地质特征 矿床成因 找矿标志 

分 类 号：P619.215[天文地球—矿床学]