湘西滑板溪金锑多金属矿床地质特征及找矿前景

发布时间：2018-06-15 14:37

本文选题：金锑多金属矿 + 区域地质背景　；参考：《金属矿山》2017年09期

【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。
[Abstract]:The skaixi gold-antimony polymetallic ore deposit is located in Anhua, Hunan Province, located in the northwestern margin of Xuefengshan arc structural belt and in the southwest of the famous Xiangxi polymetallic metallogenic belt. Combined with the latest geological work in the mining area, the regional geological background and geological characteristics of the deposit are analyzed, and the factors of internal ore control, the genesis of the deposit and the prospecting mark are discussed. The results show that the orebody mainly occurs in greyish green banded slate of Lower Ordovician Ningguo formation. In the shallow metamorphic rock body of silty slate assemblage, it is mostly vein, thin-layer, disseminated, and obviously zoned. The vein-like silicification, decolorization and pyrite mineralization are closely related to mineralization. The ore deposits are mostly distributed at the secondary fault junctions on the side of the regional large faults, which are obviously controlled by NE trending faults and controlled by stratigraphic lithology, fault structure and other factors. The orebody mainly occurs in the altered fracture zone, and the orebody (vein) is mainly filled along the fracture zone and the fracture zone, especially the ore-bearing fracture zone. On the basis of the above analysis, the comprehensive ore-controlling characteristics and mineralization characteristics are analyzed from stratigraphic, structural, alteration and geochemical primary halo anomalies. It is considered that there are NE trending faults, silicified vein broken zones and altered sections in the tectonic junction of the mining area. The surface exposed metal oxides (such as antimony bloom) and their sulfides (arsenopyrite) are favorable indicators for prospecting, and the W-NW direction of the ore area and the periphery of the 1 ~ (th) #Gui ~ (2) vein have great prospecting potential, which is worthy of further work.
【作者单位】：桂林理工大学地球科学学院;湖南省地矿局四一八队;中国建筑材料工业地质勘查中心广西总队;
【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)
【分类号】：P618.2

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