[1]柏道远,李 彬,吴梦君.2021.湖南渣滓溪锑钨矿区变形序列、成矿时代及含矿构造属性.大地构造与成矿学,优先出版:001-27.doi:10.16539/j.ddgzyckx.2021.05.016
　BAI Daoyuan,LI Bin,WU Mengjun and WANG Zhaofei.2021.Deformation sequences, ore-forming epoch and attributes of ore-bearing structurals in the Zhazixi Sb-W deposit, Hunan Province.Geotectonica et Metallogenia,优先出版:001-27.doi:10.16539/j.ddgzyckx.2021.05.016
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湖南渣滓溪锑钨矿区变形序列、成矿时代及含矿构造属性
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《大地构造与成矿学》[ISSN:ISSN 1001-1552/CN:CN 44-1595/P]

卷:
期数:
2021年优先出版
页码:
001-27
栏目:
出版日期:
2022-12-30

文章信息/Info

Title:
Deformation sequences, ore-forming epoch and attributes of ore-bearing structurals in the Zhazixi Sb-W deposit, Hunan Province
作者:
柏道远1;  李 彬1;  2;  吴梦君3;  王朝飞3
1.湖南省地质调查院, 湖南 长沙 410016; 2.东华理工大学核资源与环境国家重点实验室, 江西 南昌 330013; 3.湖南渣滓溪锑矿, 湖南 安化 413507
Author(s):
BAI Daoyuan1;  LI Bin1;  2;  WU Mengjun3 and WANG Zhaofei3
1. Hunan Institute of Geology Survey, Changsha 410016, Hunan, China; 2. State Key Laboratory of Nuclear Resources and Environment, East China University of Technology, Nanchang 330013, Jiangxi, China; 3. Zhaizixi Antimony Mine, Anhua County, Yiyang 413507, Hunan, China
关键词:
变形序列;  锑矿床;  钨矿床;  成矿时代;  含矿构造;  渣滓溪;  湖南
Keywords:
deformation sequences;  antimony deposits;  Tungsten deposits;  ore-forming epoch;  ore-bearing structures;  Zhazixi;  Hunan
DOI:
10.16539/j.ddgzyckx.2021.05.016
文献标志码:
A
摘要:
渣滓溪锑钨矿床位于雪峰弧形构造带的中段, 经历了早期钨矿、晚期锑矿等两期成矿作用。目前该矿锑矿的成矿时代不明, 控矿构造的形成背景也缺乏研究。鉴此, 本文对渣滓溪矿床及外围地区开展了大量的地表露头和井下巷道的构造观测和解析, 结合构造演化背景和区域构造特征, 厘定了构造变形序列、钨矿床和锑矿床形成的时代背景以及含矿断裂的性质和形成时代, 形成以下主要成果认识。(1)研究区自早至晚经历了6期主要变形事件: ①志留纪晚期受到NW向～NNW向挤压, 形成NE向～NEE向的褶皱、逆断裂及顺层剪切断裂; ②中三叠世晚期受到NW向～NNW向挤压, 形成NE向～NEE向的褶皱、逆断裂、逆冲剪切破裂和破劈理, NWW～NW向右行走滑断裂和剪切破裂, SN向左行剪切破裂, NNW向张节理等; ③晚三叠世受到SN向挤压, 形成NNE向左行剪切破裂、NE向左行走滑兼逆冲剪切破裂、NNW向右行剪切破裂和小断裂、SN向张节理等; ④中侏罗世受到NWW向～近EW向挤压, 形成NNE向褶皱、NEE向～EW向右行走滑断裂和剪切破裂、NWW～NW向左行走滑断裂和剪切破裂; ⑤早白垩世受到区域NW-SE向伸展, 形成NE向正断裂; ⑥古近纪中晚期受到NE向挤压, 形成EW向～NEE向左行剪切破裂和小断裂、SN向～NNE向右行走滑断裂和剪切破裂。(2)钨矿床和锑矿床分别形成于晚三叠世和晚侏罗世, 与区域印支晚期和早燕山期花岗质岩浆活动相对应。(3)锑矿的容矿构造为NWW向～NNW向的次级右行走滑断裂, 断裂形成于中三叠世晚期的NW向挤压和晚三叠世的SN向挤压; 钨矿的容矿构造包括志留纪晚期形成的NEE向层间断裂, 中三叠世晚期和晚三叠世形成的层内的NWW向和NNW向右行剪切破裂、NNE向左行剪切破裂、NW向张节理等。
Abstract:
The Zhazixi Sb-W deposit located in the middle segment of the Xuefeng orogen has experienced two stages of mineralization, i.e. early tungsten and late antimony. At present, the metallogenic age of the Sb deposit is unknown, and the tectonic settings of ore controlling structures are lack of research. In view of this, the authors carried out detailed structural observation and analysis of surface outcrops and in the pits in the Zhazixi deposit and its surrounding areas, and then combined with the tectonic evolution and regional structural characteristics, the deformation sequences are distinguished, the formation ages of tungsten and antimony deposits, as well as the nature and formation ages of ore bearing faults are discussed, and, as a result, the following conclusions have been reached: (1) The study area has experienced sixMain deformation events: ①Regional NW to NNW compression in the Late Silurian which formed NE to NEE-trending folds, thrust faults and bedding-parallel shear faults; ②Regional NW to NNW compression in the late Middle Triassic which formed NE to NEE-trending folds, thrust faults, thrust shear fractures and cleavages, NWW to NW-trending dextral strike-slip faults and shear fractures, SN-trending sinistral shear fractures and NNW-trending tension joints; ③Regional SN compression in the Late Triassic which formed NNE-trending sinistral shear fractures, NE-trending sinistral strike-slip-thrust shear fractures, NNW-trending dextral shear fractures and small faults, SN-trending tension joints; ④ Regional NWW to EW compression in the late Middle Jurassic which formed NNE-trending folds, NEE to EW-trending dextral strike-slip faults and shear fractures, NWW to NW-trending sinistral strike-slip faults and shear fractures;⑤Regional NW-SE extension in the Early Cretaceous which formed NE-trending normal faults; ⑥Regional NE compression in the middle-late Paleogene which formed EW to NEE-trending sinistral shear fractures and small faults, SN to NNE-trending dextral strike-slip faults and shear fractures. (2) Tungsten deposits and antimony deposits were formed in the Late Triassic and Late Jurassic respectively, corresponding to the regional late Indosinian and early Yanshanian graniticMagmatism. (3) The ore-bearing structures of antimony deposits are NWW to NNW-trending secondary dextral strike-slip faults formed in regional NW-striking compression in the late Middle Triassic and in regional SN compression in the Late Triassic; The ore-bearing structures of tungsten deposits are NEE-trending interlayer faults formed in the Late Silurian, NWW- and NNW-trending dextral strike-slip fractures, NNE-trending sinistral strike-slip shear fractures and NW-trending tension joints formed in the late Middle Triassic and Late Triassic.

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备注/Memo

备注/Memo:
收稿日期: 2021-06-20; 改回日期: 2021-09-23
项目资助：湖南省地质院科研项目(201917)资助。
第一作者简介：柏道远(1967-), 男, 研究员级高级工程师, 博士, 长期从事区域地质调查与基础地质研究。Email: daoyuanbai@sina.com
更新日期/Last Update: 2021-11-09