秦岭二郎坪群海底火山喷流成矿模式与成因分析  

The Metallogenic Model and Genetic Analysis of Erlangping Group＇ s Submarine volcanic Eruption System in Qinling Orogenic Belt

作　　者：王长永[1] 王瑞良[1] 杨明[1] 

机构地区：[1]河南省地质矿产勘查开发局第一地质勘查院,河南郑州450000

出　　处：《资源导刊（地球科技版）》2013年第5期4-7,共4页

摘　　要：根据秦岭造山带米坪→龙王庙地区二郎坪群海底火山喷流成矿系统的演化模式及成因等方面研究，该区内矿床或含矿层的分带实质上反映了距火山喷发中心带的距离不同及火山作用的差异，矿化从熔浆型铁铜矿层→喷流型多金属矿层→火山熔岩、碎屑岩中的金银矿源层的变化；其火山环境分别为火山熔浆喷溢相→海底火山爆发射气相→火山沉积相。火山作用形成的多金属矿成因类型为区内主要的成矿类型，后经多阶段、多期次区域变质作用、动力变质作用又演化成了多种热液成因的成矿类型。The metallogenic model and genetic analysis of Erlangping Group＇ s submarine volcanic eruption system in Miping-Longwangmiao area, northern Qinling orogenic belt are primarily studied in the paper. According to the research on this region＇ s ore deposits evolution and genetic analysis, we consider that this area＇ s zoning ore-bearing rock series and deposits essentially indicate their different distances from the crater and the different volcanism. From magmatic iron-copper ledges-effusive polymetallic ledges-pyroclastic goldsilver ledges, the corresponding volcanic environments are magmatic overflowing facies-submarine volcano eruptive facies-volcanic-sedimentary facies. Volcanic polymetallic deposits＇ ore forming type is the dominating oreforming type in the area. It gradually changed into a multi-hydatogenesis ore-forming type through multi-stage regional metamorphism and dynamic metamorphism.

关 键 词：海底火山喷流矿床 成因分析 火山熔浆 火山爆发 火山沉积 

分 类 号：P542.2[天文地球—构造地质学]