摘要
广西隆林县隆或地区金矿产于南盘江—右江成矿带中部的北西向马雄背斜、隆或穹隆及龙艾穹隆周缘。金矿体主要赋存于背斜(穹隆)核部,北西和近东西向断裂带中偶见脉状矿体。区内由深部成矿流体沿背斜(穹隆)构造核部多组碳酸盐岩与泥质碎屑岩不整合面或岩层界面侧向运移,交代形成构造蚀变体,并富集成矿。目前区内已探明金矿体埋深均较浅,其深部找矿一直未取得突破。本文拟通过典型矿床研究,建立区域找矿预测模型,为该区深部隐伏金矿的找矿提供理论指导。预测区内深部金矿主要集中赋存在以下4个区域:①隆或穹隆深部核部3 km范围内D_(1)y/Є_(3+4)l构造蚀变体(埋深260~500 m);②龙艾穹隆深部核部1 km范围内D_(1)y/Є_(3+4)l、C_(1)yt/D_(3)r构造蚀变体(埋深700~1400 m);③马雄背斜近核部D_(1)y/Є_(3+4)l、C_(1-2)n/D_(3)l、P_(3)h/C_(1-2)n、T_(1)l/P_(3)h构造蚀变体;④北西向、东西向断裂深部与构造蚀变体叠加复合部位。
The gold-antimony deposits in the Longhuo area,Longlin County,Guangxi,are located at the margin of some anticlines/domes(eg.,Maxiong,Longhuo and Longai)in the middle of the Nanpanjiang-Youjiang Basin.The gold orebodies are mainly hosted in the core of the anticline(dome),and minor vein-type orebodies occur in the NW and nearly EW-trend fault zones.In this area,the ore-forming fluids migrate laterally along the unconformity surface or the interfaces between carbonate rocks and argillaceous rocks within the core of the anticline(dome)structure,and further leading to Au ores deposited in the structural alteration bodies via fluid-rock interaction.However,the identified gold mineralization bodies in this area are all relatively shallow in depth,yet significant breakthroughs in deep exploration have not been achieved.This paper aims to establish a regional mineral prediction model through the study of typical deposits,thereby providing theoretical guidance for the deep-exploration of concealed gold mineralization.The results for this study show that deep gold-antimony exploration is mainly concentrated in the following four areas:①The D_(1)y/Є_(3+4)l structural alteration body within 3 km of the deep core of the Longhuo dome(buried depth of 260-500 m);②The D_(1)y/Є_(3+4)ls and C_(1)yt/D_(3)r structural alteration bodies within 1 km of the deep core of the Long'ai dome(buried depth of 700-1400 m);③The D_(1)y/Є_(3+4)ls,C_(1-2)n/D_(3)l,P_(3)h/C_(1-2)n,T_(1)l/P_(3)h structural alteration bodies near the core of the Maxiong anticline;④The superimposed and composite zones where deep NW and EW-trend faults intersect with structural alteration bodies.
作者
万大学
陈发恩
刘建中
王泽鹏
杨成富
邵云彬
游安康
邰文星
王大福
李俊海
徐良易
谭礼金
宋威方
WAN Daxue;CHEN Fa'en;LIU Jianzhong;WANG Zepeng;YANG Chengfu;SHAO Yunbin;YOU Ankang;TAI Wenxing;WANG Dafu;LI Junhai;XU Liangyi;TAN Lijin;SONG Weifang(105 Geological Brigade,Guizhou Bureau of Geology and Mineral Exploration and Development,Guiyang 550018,Guizhou,China;Guizhou Bureau of Geology and Mineral Exploration and Development,Guiyang 550004,Guizhou,China;Engineering Technology Innovation Center for Mineral Resources Exploration in Bedrock Areas,Ministry of Natural Resources,Guiyang 550081,Guizhou,China;No.6 Geological Brigade,Hubei Provincial Geological Bureau,Xiaogan 432000,Hubei,China)
出处
《矿产勘查》
2025年第8期1999-2009,共11页
Mineral Exploration
基金
深地国家科技重大专项“滇黔桂毗连区锡锑金矿高效探测技术研发与应用”课题(2024ZD1001704)
自然资源部-科技创新团队“贵州省卡林型金矿成矿与找矿创新团队”(ZRC-TD2023006)联合资助。
关键词
金矿
控矿因素
构造蚀变体
找矿预测
广西隆或地区
gold deposit
ore-controlling factors
ore-controlling by decollement structure
prospecting prediction
Longhuo area,Guangxi Province
