摘要
老虎沟金矿位于排山楼金矿床北侧3 km处,分布于NE向上五家子—水泉韧性剪切带上,为剪切带石英脉型金矿床。该金矿为检查水系沉积物异常时所发现,目前共发现8条矿体,严格受断裂构造控制,多呈NNE、NWW向展布,各矿体主要产于太古宇建平群大营子组地层中或其与燕山期花岗岩体的接触带部位。结合相关地质勘探成果,分析了区域地质背景、矿区地质特征、矿体特征及围岩蚀变特征,在此基础上分别从地层、构造、岩浆活动、围岩蚀变等方面分析了矿区金成矿条件,结果表明:太古宇变质岩地层为金成矿矿源层,多期次构造活动为金成矿提供了储运空间,燕山期大规模岩浆侵位为金成矿提供了热液源和推动力,促使地层中金活化聚集,含矿热液沿着构造裂隙迁移,最后在构造宽缓膨大部位富集成矿。在上述分析的基础上,对老虎沟矿区找矿方向进行了讨论,对于区内进一步开展金矿找矿勘探工作有一定的参考价值。
Laohugou gold deposit is located in the 3 km north of Paishanlou gold deposit.Laohugou gold deposit is distributed in the northeast of Wujiazi-Shuiquan ductile shear belt,it is belongs to the shear band quartz vein type gold deposit.The deposit is found during the process of checking the anomalies of stream sediments,at present,eight ore-bodies are found in the mining area,the ore-bodies are strictly controlled by fracture structures,most of them are distributed with the directions of NNE and NWW.The ore-bodies are originated from the Dayingzi formation of Jianping Group of Archaean Eonothem of the contact zone of Dayingzi formation and Yanshanian granite rock mass.Combing with some related geological and exploration results of Laohugou mining area,the regional geological background,geological characteristics of the mining area,geological characteristics of the ore-bodies and wall rock alteration characteristics are discussed in depth,besides that,the gold metallogenic conditions of Laohugou mining area are analyzed from the aspects of strata,structure,magmatic activity and wall rock alteration.The results show that the gold metallogenic mineral source layer is metamorphic rock formation of Archaean Eonothem,the gold metallogenic storage space is provided by multi-phase tectonic activity,the hydrothermal source and driving force of gold metallogenic are provided by the large-scale magmatic emplacement of Yanshanian,so the gold activation and aggregation of strata are promoted,the ore-bearing hydrothermal is migrated along the tectonic fissures,the gold enrichment mineralization is conducted in the regional tectonic rolling swelled.Based on the above analysis results,the prospecting directions of Laohugou mining area is discussed to provide some reference for the further geological and exploration work of gold deposit in the area.
出处
《现代矿业》
CAS
2017年第1期44-50,共7页
Modern Mining
关键词
金矿
区域地质背景
地质特征
围岩蚀变
金成矿条件
找矿方向
Gold deposit
Regional geological background
Geological characteristics
Wall rock alteration
Gold metallogenic conditions
Prospecting direction
作者简介
刘君（1979-），男，高级工程师，硕士研究生，111000辽宁省辽阳市文圣区新城路15号。
