河南新县方岗一带脉石英矿地质特征及找矿方向

Geological Characteristics and Prospecting Direction of Fanggang Vein Quartz Deposit in Xinxian County,Henan Province

河南省新县方岗一带脉石英研究区位于秦岭—大别造山带东段,区内构造复杂多样,侵入岩和火山活动强烈,变质作用普遍。区内脉石英矿床主要产于北东向、北西向脆性断裂,与燕山期岩浆热液活动密切相关。本文在分析了新县方岗一带脉石英矿成矿地质背景和矿床地质特征的基础上,指出燕山期石英脉为主要的找矿目标,其Si O2平均含量超过99%,新元古代田铺序列及上太古界大别岩群片麻岩中脆性断裂带发育地区为重点找矿地带及找矿方向,对大别山地区下一步脉石英矿种的勘查工作具有一定的指导意义。

Fanggang vein quartz research area in Xinxian county,Henan province is located in the eastern part of Qinling Dabie orogenic belt.The structure in the area is complex and diverse,the intrusive rock and volcanic activity are strong,and the metamorphism is common.Vein quartz deposits in the area mainly occur in NE and NW brittle faults,which are closely related to Yanshanian magmatic hydrothermal activities.Based on the analysis of the metallogenic geological background and geological characteristics of Fanggang vein quartz deposit in Xinxian county,this paper points out that the Yanshanian quartz vein is the main prospecting target,with an average SiO2 content of more than 99%.The Neoproterozoic Tianpu sequence and the development area of brittle fault zone in gneiss of upper Archean Dabie group are the key prospecting areas and prospecting directions,it has certain guiding significance for the next step of vein quartz mineral exploration in Dabie mountain area.