摘要
滑板溪金锑多金属矿地处湖南安化境内,位于雪峰山弧形构造带上段北西边缘,地处著名的湘西多金属成矿带西南部。结合矿区最新地质工作成果,分析了区域地质背景、矿床地质特征,并对区内控矿因素、矿床成因及找矿标志进行了探讨。研究表明:(1)矿(化)体主要赋存于奥陶系下统宁国组灰绿色条带状板岩、粉砂质板岩组合的浅变质岩体中,多呈脉状、薄层状、浸染状产出,分带明显;(2)矿化蚀变作用强烈,细脉状硅化、退色化及黄铁矿化与矿化关系密切;(3)矿床多分布于区域性大断裂旁侧的次级断裂交汇处,受NE向断裂控制作用明显,并受地层岩性、断裂构造等因素共同控制,属中—低温热液充填改造型矿床;(4)矿体主要产于蚀变破碎带内,成矿方式以矿体(脉)沿断裂破碎带和裂隙充填为主,含矿断裂破碎带尤为发育。在上述分析的基础上,从地层、构造、蚀变、化探原生晕异常等方面分析了综合控矿特征及矿化特征,认为矿区构造交汇部位、NE向断裂、硅化脉破碎带、蚀变地段、地表出露的金属氧化物(如锑华)及其硫化物(毒砂)为有利的找矿标志;矿区W—NW向深部及1~#、2~#矿脉外围具有较大的找矿潜力,值得进一步开展工作。
Huabanxi Au-Sb polymetallic deposit is located in Anhua County,Hunan Province,which is distributed in the northwest edge of the upper section of Xuefeng Mountain arcuate tectonic belt,the southwest of polymetallic metallogenic belt in Western Hunan Province. Based on the latest prospecting results in the mining area,the regional geological background,deposit geological characteristics are discussed,besides that,the ore-controlling factor,deposit genesis and prospecting indicator are also analyzed in detail. The study results show that：（1）the mineralization bodies（ ore-bodies） are mainly hosted in the shallow metamorphic rocks of the lime-green striped slate and silvery slate in Ningguo Formation of Lower Ordovician Series,the shapes of them are mostly presented as veined,layered,disseminated,and zoning characteristics is obvious;（2）the mineralization alteration effect in the mining area is strong,the fine vein silicide,fading and pyritization are closely related to mineralization;（3）the deposits are mostly distributed in the intersection area of secondary fracture that is located in the side of the regional large fractures,and they are controlled by NE trending fracture significantly,and also controlled by strata,lithology and fracture structures,the deposits in the mining area are belongs to medium-temperature hydrothermal filling transformation deposit;（4）the orebodies are mainly produced in alteration fracture belt,the metallogenic mode is mainly for the filling mode is conducted by orebodies（ veins） along the fault fracture zone and fissure. Based on the above analysis results,the comprehensive controlling characteristics and mineralization characteristics are analyzed from the aspects of strata,structure,alteration and geochemical primary halo anomalies,the results show that the favorable prospecting indicators of the mining area are tectonic intersection area,NE trending fault,siliconized vein fracture zone,alteration section,the metal oxides（ such as antimony） and theirs sulfides（ arsenopyrite） exposed in the surface in the mining area; the prospecting potential of the W-NW direction of the mining area and the periphery of 1~#、2~#ore-bodies are huge,they are worth conducting further prospecting and exploration work in the areas.
出处
《金属矿山》
CAS
北大核心
2017年第9期151-159,共9页
Metal Mine
基金
湖南省国土资源厅地质勘查基金项目(编号:201303061)
桂林理工大学研究生创新项目(编号:SS201601)
关键词
金锑多金属矿
区域地质背景
地质特征
控矿因素
矿床成因
找矿标志
Au-Sb polymetallic deposit
Regional geological background
Geological characteristics
Ore-controlling
Deposit genesis
Prospecting indicator
