湘东南铁石垅铅锌矿床变形序列、控矿构造及找矿方向OA
Deformation Sequences,Ore-controlling Structures,and Prospecting Directions of the Tieshilong Pb-Zn Deposit in Southeastern Hunan Province
铁石垅铅锌矿床位于湘东南东坡多金属矿田东北部,赋矿断裂主要呈 NE 向,其次为 NW 向、近E-W向和近S-N向.控矿构造研究是铁石垅矿床的薄弱环节,制约了成矿规律的深入探讨与进一步找矿方向的提出.本文通过详细的地表和井下露头构造观测与解析,结合区域构造特征和演化背景,厘定了铁石垅矿区构造变形序列,确定了控矿构造类型及其属性,提出了深边部找矿方向.研究认为,矿区中生代以来先后经历了 5 期主要变形事件:D1 期NEE-近EW向挤压,形成NE向右行走滑断裂和剪切破裂、S-N向逆断裂及近 S-N向西山背斜;D2 期 NW-SE向挤压,形成 NE 向逆冲断裂、S-N 向左行走滑断裂和剪切破裂;D3 期 NNW-近SN向挤压,形成 E-W向逆断裂、NW向右行走滑断裂和剪切破裂及 NNE向左行剪切破裂;D4 期NWW-SEE向挤压,形成NEE-EW向右行走滑断裂和剪切破裂及NW向左行剪切破裂;D5 期NE-SW向挤压,形成NEE-EW向左行剪切破裂.综合分析认为,矿区主要导矿构造为背斜核部的NNW-SN向隐伏逆断裂,主要配、容矿构造为 D1～D4 期形成的不同规模、产状和运动学性质的断/破裂.矿区内进一步的找矿方向是宝安岭背斜和赵家复式背斜核部控制程度较低区段内的不同方向断裂、背斜核部逆断裂及不同方向含矿断裂的复合部位.
The Tieshilong Pb-Zn deposit is located northeast of the Dongpo polymetallic orefield in southeastern Hunan Province.The ore-bearing faults are majorly in the NE-trending,followed by NW-,EW-,and SN-trending.The study of ore-controlling structures is a weak link in the Tieshilong Pb-Zn deposit,which restricted the understanding for metalloginic regularity and further prospecting direction.Through detailed structural observation and analysis of outcrops and in pits in the Tieshilong deposit,combined with the regional structural characteristics and tectonic evolutions,the authors clarified the deformation sequences,determined the types and attributes of ore-controlling structures,and pointed out the prospecting directions.This study suggests that the research area experienced five major deformation events since the Mesozoic:D1—NEE-to-EW compression which caused the formation of NE-trending dextral strike-slip faults and shear fractures,NS-trending thrust faults,and NS-trending Xishan anticline;D2—NW-SE compression which resulted in NE-trending thrust faults and NS-trending sinistral strike-slip faults and shear fractures;D3—NNW-to-NS compression which led to the development of EW-trending thrust faults,NW-trending dextral strike-slip faults and shear fractures,and NNE-trending sinistral shear fractures;D4—NWW-SEE compression which resulted in the NEE-to-EW-trending dextral strike-slip faults and shear fractures and NW-trending sinistral shear fractures;D5—NE-SW compression which led to the formation of NEE-to-EW-trending sinistral shear fractures.The ore-conducting structures are mainly the NNW-to-SN-trending buried faults located along the axial zone of the anticlines.The main ore-bearing structures are the faults and fractures of different scale,occurrence,and kinematic properties formed during stage D1 to D4.The further prospecting directions within the Tieshilong mining area should focus on the faults within the low-controlled sections of the cores of the Bao'anling anticline and Zhaojia anticlinorium,the thrust faults in the cores of anticlines,and the composite areas of ore-bearing faults with varying orientations.
曾广乾;张小强;周丽芸;柏道远;杜云;黄建中;朱文兵;曹创华;文春华;陈志超;蒙正勇
湖南省地质调查所,湖南 长沙 410114湖南省地质调查所,湖南 长沙 410114湖南省地质调查所,湖南 长沙 410114湖南省地质调查所,湖南 长沙 410114湖南省地质调查所,湖南 长沙 410114||中国科学技术大学地球和空间科学学院,中国科学院壳幔物质与环境重点实验室,安徽 合肥 230026湖南省地质院,湖南 长沙 410014湖南省地质调查所,湖南 长沙 410114湖南省地质调查所,湖南 长沙 410114湖南省地质调查所,湖南 长沙 410114湖南省地质调查所,湖南 长沙 410114湖南省地质调查所,湖南 长沙 410114
天文与地球科学
变形序列控矿构造找矿方向铁石垅铅锌矿湘东南
deformation sequencesore-controlling structuresprospecting directionsTieshilong Pb-Zn depositsoutheastern Hunan Province
《地球学报》 2026 (2)
257-274,18
本文由湖南省地质院科技计划项目(编号:HNGSTP202507HNGSTP202307HNGSTP202317)、湖南省2025年十大技术攻关项目(编号:2025QK1010)、湖南省自然科学基金项目(编号:2024JJ8366)、湖南省自然资源厅重大科研项目(编号:湘自资科20240102DZ)和国家重点研发项目课题(编号:2023YFC2906405)联合资助. This study was supported by the Science and Technology Program of Geological Bureau of Hunan Province(Nos.HNGSTP202507,HNGSTP202307,and HNGSTP202317),the top 10 Technological Breakthrough Projects in Hunan Province in 2025(No.2025QK1010),Natural Science Foundation of Hunan Province(No.2024JJ8366),Scientific Research Pro-ject of the Department of Natural Resources of Hunan Province(No.20240102DZ),and National Key R&D Program of China(No.2023YFC2906405).
评论