贵州贞丰黄家湾萤石矿床控矿因素与找矿方向探讨  

Discussion on the Ore-controlling Factors and Prospecting Direction of Fluorite Deposit of Huangjiawan Area in Zhenfeng,Guizhou Province

作　　者：尹廷龙 侬康 徐阳东[1] 李字洪 郑前飞 祁连素 YIN Ting-long;NONG Kang;XU Yang-dong;LI Zi-hong;ZHENG Qian-fei;QI Lian-su(Institute of Geophysical and Geochemical Exploration,Guizhou Bureau of Geology and Mineral Resources Development,Guiyang 550018,Guizhou,China)

机构地区：[1]贵州省地矿局地球物理地球化学勘查院,贵州贵阳550018

出　　处：《贵州地质》2024年第3期278-284,共7页Guizhou Geology

基　　金：贵州省科技计划项目(贵州稀土、钡、氟等特色资源成矿规律与找矿预测研究)(黔科合战略找矿〔2022〕ZD004);贵州省科技支撑计划项目《基于地球物理技术预测黔西南纳板穹隆带干热岩资源成矿远景区研究》(黔科合支撑〔2023〕一般166)联合资助。

摘　　要：以贞丰背斜黄家湾萤石矿床近年深部勘探资料为主要依据,通过对其控矿构造类型及其控矿作用的分析,对萤石矿导矿构造与容矿空间规律的研究,认为控矿因素主要为北西向贞丰背斜、北西向F1断层、次级背斜、有利的岩性组合,形成了背斜构造之逆冲断裂-次级背斜构造组合样式,即北西向贞丰背斜及其伴生的北西向F1断裂与次级的黄家湾背斜共同构成热液上涌通道及容矿空间。贞丰背斜是矿区内最主要控矿构造,其形成发育了主要控矿断裂(F1等)及次级控矿背斜(黄家湾背斜);逆冲断裂F1是最重要的导矿构造;龙潭组一段(P_(3)l)/中上部蚀变角砾岩体为重要的容矿空间,控制矿床的背斜构造中之逆冲断裂-次级背斜构造组合,以及龙潭组一段(P_(3)l)/中上部的容矿空间,是将来萤石矿勘查的主攻目标。深入研究构造(背斜+断裂)、地层岩性组合等控矿因素有利于拓展区域找矿思路,为深部萤石、金、锑热液矿产找矿勘探提供参考。Based on the deep exploration data of the Huangjiawan fluorite deposit in the Zhenfeng anticline in recent years,through the analysis of the types of ore-controlling structures and their ore-controlling functions,the study on the ore-conducting structures and host space law of the fluorite deposit is carried out,it is considered that the main ore-controlling factors are NW Zhenfeng anticline,NW F1 fault,secondary anticline and favorable lithologic assemblage,forming the thrust-secondary anticline structural assemblage style of anticline structures,the NW Zhenfeng anticline and its associated NW F1 fault together with the secondary Huangjiawan anticline form a hydrothermal upwelling channel and ore-hosting space.The Zhenfeng anticline is the most important ore-controlling structure in the mining area,which is formed by the main ore-controlling faults(F1 et al)and the secondary ore-controlling anticline(Huangjiawan anticline),and the thrust fault F1 is the most important ore-guiding structure The altered breccia in the first member(P_(3)l)middle-upper part of the Longtan Formation is an important ore-hosting space,which controls the thrust fault-secondary anticline structure assemblage in the anticlinal structure of the deposit,and the ore-hosting space in the first member(P_(3)l)middle-upper part of the Tarim Formation,it will be the main target of fluorite exploration in the future.Further study on ore-controlling factors such as structure(anticline+fault)and stratigraphic-lithologic association is beneficial to expanding regional prospecting ideas and providing references for prospecting of deep fluorite,gold and antimony hydrothermal deposits.

关 键 词：贞丰背斜 次级背斜 萤石矿床 控矿因素 黔西南 

分 类 号：P619.215[天文地球—矿床学]