印支—燕山期断裂构造对辽东小窑沟滑石矿床的改造及找矿预测  

Genesis and Metallogenic Prediction of Talc Deposit in Xiaoyaogou Area,Southern Liaoning Province

作　　者：樊金虎[1] 李鹏 王鹏[1] 孙立秋[1] 王政[2] FAN Jin-hu;LI Peng;WANG Peng;SUN Li-qiu;WANG Zheng(The 5th Geological Brigade Co.LTD of Liaoning Province,Yingkoudashiqiao 115100,China;Jilin Nonferrous Metal Geological Exploration Bureau 604 Team,Jilin 132013,China)

机构地区：[1]辽宁省第五地质大队有限责任公司,辽宁营口大石桥115100 [2]吉林省有色金属地质勘查局六〇四队,吉林吉林132013

出　　处：《中国非金属矿工业导刊》2024年第3期11-15,共5页China Non-Metallic Minerals industry

摘　　要：小窑沟地区滑石矿是辽宁南部营口—海城地区滑石成矿带内一处典型的大型滑石矿床。古元古界辽河群大石桥岩组三岩段的菱镁大理岩、白云石大理岩是滑石的主要含矿层和赋矿围岩,矿床受控于区域近东西向的英落—草河口复向斜北翼的层间挤压破碎带,其成矿与区域变质作用密切相关,矿床属沉积变质层控中低温热液交代成因。本文在详细研究矿床特征的基础上,结合区域成矿规律和近几年矿区取得的找矿成果,通过分析本区滑石矿床的控矿因素和找矿标志,认为小窑沟矿区勘查中发现的北西向F1断层为印支—燕山期(成矿期后)形成的右行平移断层,该断层深部错断了小窑沟大型滑石矿床,导致矿区深部厚大矿体突然消失,因此认为F1断层以东大石桥岩组三岩段分布区具有进一步找矿潜力。The Xiaoyaogou talc deposit is a typical large-scale talc deposit in the talc metallogenic belt of the Yingkouhaicheng area,southern Liaoning province.Magnesite marble and dolomite marble of the three-member Dashiqiao Formation in the Paleoproterozoic Liao River Group are the main ore-bearing beds and host country rocks of talc,The deposit is controlled by the interlayer compression fracture zone near the north wing of the yingluo-caohekou syncline,Its mineralization is closely related to regional metamorphism,and the deposit belongs to middle-low temperature hydrothermal metasomatism of sedimentary metamorphism stratabound.On the basis of studying the characteristics of the deposit in detail,combining with the regional metallogenic regularity and the prospecting achievements in recent years,this paper analyzes the ore-controlling factors and prospecting criteria of talc deposit in this area,it is considered that the nw-trending F1 fault discovered in the exploration of Xiaoyaogou mining area is a right-lateral translational fault formed during the Indo-Chinese and Yanshan Epoch(after metallogenic period),as a result,the thick and large orebodies in the deep part of the mining area disappear suddenly.Therefore,it is considered that the distribution area of the three-rock member of Dashiqiao Formation to the east of F1 fault has further prospecting potential.

关 键 词：小窑沟滑石矿床 印支—燕山期 断裂构造改造 找矿预测 

分 类 号：P619.235[天文地球—矿床学]