湖南安化渣滓溪钨锑矿床成矿构造分析及找矿预测

金属矿山 ›› 2020, Vol. 49 ›› Issue (09): 147-158.

湖南安化渣滓溪钨锑矿床成矿构造分析及找矿预测

苏特，钱建平，周伟蛟，喻菊阳，张果，关显东，吴正鹏

1. 桂林理工大学地球科学学院，广西桂林 541004； 2. 贵州省地质矿产勘查开发局一0三地质大队，贵州铜仁 554300； 3. 湖南省地质矿产勘查开发局四一八队，湖南娄底 417000

出版日期:2020-09-15 发布日期:2020-10-19
基金资助:
国家自然科学基金项目（编号：41263003）

Analysis of the Metallogenic Structure and Prospecting prediction of the Zhazixi Tungsten-antimony Deposit in Anhua County， Hunan Province

SU Te，QIAN Jianping，ZHOU Weijiao，YU Juyang，ZHANG Guo，GUAN Xiandong，WU Zhengpeng

1. College of Earth Science，Guilin University of Technology，Guilin 541004，China； 2. No. 103 Geological Party， Guizhou Bureau of Geology and Mineral Resources Development， Tongren 554300， China； 3. No. 418 Geological Party， Hunan Bureau of Geology and Mineral Resources Development，Loudi 417000，China

Online:2020-09-15 Published:2020-10-19

摘要/Abstract

摘要： 湖南省渣滓溪钨锑矿床是湘西地区一个大型的锑矿床，伴生钨矿。该矿床在成矿构造分析方面的研究仍较薄弱，制约了进一步找矿的突破。通过区域控矿构造分析、现场构造与矿体地质调查、历年矿区勘查资料整理编图、地质体产状统计及矿体成分分析，对构造控矿规律和构造演化序列进行了总结。结果表明：区域上锑钨矿床的分布主要受正向构造控制；矿区控矿构造型式为“十”字型；锑矿脉具有NNW—NWW向优势方位，钨矿体具有NNE向优势方位；锑矿体具有向南东侧伏规律，钨矿体具有向北东侧伏规律；F3上盘次级断裂是锑矿体有利的容矿构造。“钨早锑晚”属不同构造—成矿阶段形成，矿区南侧为矿化中心。矿区构造变形—成矿序列可归纳为：加里东期区域NE向复式背斜断裂隆起带构造定格阶段；印支期第一阶段——盖层与基底NEE向同轴叠加褶皱形成；印支期第二阶段——NE向钨矿体形成；印支期第三阶段——NNW—NWW向锑矿体形成；喜山期——NEE向破矿构造形成。基于对矿床地质特征、构造控矿规律和矿化垂向分带规律的研究认为，矿区深部具有较好找矿前景，并圈定出了两处找矿靶区：1号靶区位于9号锑矿体南东侧，2～6号勘探线之间，垂向标高为-750～-900 m；2号靶区位于13号钨矿体北东侧， W10~W12号勘探线之间，垂向标高为-270～-370 m。

关键词: 钨锑矿床, 成矿构造分析, 找矿预测, 找矿靶区

Abstract: The Zhazixi tungsten-antimony deposit in Hunan Province is a large antimony deposit which has associated tungsten mine in Western Hunan.The study on its metallogenic structure is still less，which restricts the further prospecting.The regularity of tectonic ore-controlling and the sequence of tectonic evolution of this area have been summarized through regional ore-controlling structure analysis， field structure and ore body geological survey， compilation and mapping of exploration data over the years， occurrence statistics of geological bodies and composition analysis of ore bodies. The results show that ore deposits distribution is main controlled by the positive structure.The type of ore-controlling structure in mining area is "cross" type. Antimony orebody has superiority trend in NWW and NNW trending，tungsten orebody has superiority trend in NEE trending. Antimony orebody has the lateral trending in SE， and the tungsten orebody is in NE. Subsidiary fractures of F3 in the hanging wall is the host structure for antimony orebody. Antimony and tungsten formed in different structure-mineralizing stages and formation of tungsten is earlier. Mineralization center is in the south of the mining area.The deformation-metallogenic sequence in mining area can be summed up as follows: NE trending anticlinorium of the regional tectonics uplifted in Caledonian； NEE trending coaxial superimposed fold in the cover and basement formed in the first stage of Indo-Chinese epoch； NE trending tungsten orebody formed in the second stage of Indo-Chinese epoch； NNW-NWW trending antimony orebody formed in the third stage of Indo-Chinese epoch； NEE trending ore-breaking structure formed in Himalayan Epoch. Based on the study of geological characteristics， structural ore-controlling regularity and vertical mineralization zoning regularity of the deposit，it is considered that the deep part of the mining area has good prospecting prospects and two prospecting target areas are obtained:No.1 prospecting target area is located in the SE of No.9 antimony orebody， between No.2 and No.6 exploration lines and the vertical elevation is from -750 m to -900 m； No.2 prospecting target area is located in the NE of No.13 tungsten orebody，between W10 to W12 exploration lines and the vertical elevation is from -270 m to -370 m.

Key words: tungsten-antimony deposit, metallogenic structure analysis, prospecting prediction, prospecting target area

苏特, 钱建平, 周伟蛟, 喻菊阳, 张果, 关显东, 吴正鹏. 湖南安化渣滓溪钨锑矿床成矿构造分析及找矿预测[J]. 金属矿山, 2020, 49(09): 147-158.

SU Te, QIAN Jianping, ZHOU Weijiao, YU Juyang, ZHANG Guo, GUAN Xiandong, WU Zhengpeng. Analysis of the Metallogenic Structure and Prospecting prediction of the Zhazixi Tungsten-antimony Deposit in Anhua County， Hunan Province[J]. Metal Mine, 2020, 49(09): 147-158.

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