陕西铅锌矿类型及其找矿方向

TYPES AND PROSPECTING TREND OF LEAD AND ZINC ORES IN SHAANXI PROVINCE

通过对陕西以往和新发现铅锌矿资源成果的分析、总结,将陕西铅锌矿床成因类型划为四级,其中一级划为内生矿床、外生矿床、变质矿床及叠生矿床;二级划为层控矿床、区域变质矿床、沉积矿床、火山成因矿床、热液矿床、接触交代(矽卡岩)矿床及伟晶岩矿床,其中区内最重要的铅锌矿床成因类型为层控矿床,次为区域变质矿床;与主要铅锌矿床有关的成矿系列初步划分为4个矿床成矿系列组合,6个成矿系列类型,9个成矿系列,其中主要与铅锌矿床有关的成矿系列为海底热液喷流—沉积铅锌矿床成矿系列、与热水渗滤作用有关的铅锌矿床成矿系列、海底喷流沉积—热液改造铅锌铜矿床成矿系列;与铅锌成矿有关的Ⅲ级成矿区(带)有5条,有关的Ⅳ级成矿区(带)有7条,主要铅锌成矿区(带)有12条,其中铅锌重点成矿区(带)有7条,即铅硐山—黄柏源铅锌铜成矿带、银硐子—桐木沟银铅锌铜重晶石成矿带、东川—小川铅锌铜成矿带、锡铜沟—板岩镇铅锌金汞锑成矿带、赵湾—黄石板铅锌金成矿带、阳平关—朱家坝古生代铅锌钴磷海泡石成矿区和勉县茶店子—宁强青木川金银铅锌铜硫成矿带。

The genetic types of lead-zinc deposits in Shaanxi province are divided into four grades on the basis of analysis of literature information about the previous and new-discovered lead-zinc resources, in which the first grade includes endogenetic deposit, exogenetic deposit, metamorphic deposit and diplogenetic deposit; and the second grade stratabound deposit, regionally metamorphosed deposit, sedimentary deposit, volcanogenic deposit, hydrothermal deposit, contact-metasomatic deposit （skarn-type） and pegmatite deposit, in which the stratabound type is the most important and the regionally metamorphosed types secondary. The metallogenic series pertaining to the major lead-zinc deposits is primarily designated as 4 groups of metallogenic series, 6 types of metallogenic series, 9 metallogenic series, in which the metallogenic series, mostly intimate to lead-zinc deposits, are （1） submarine hydrothermal cascade-sedimentary; （2） related to thermal water leakage; and （3） lead-zinccopper series of submarine cascade sedimentary-hydrothermal deformation types, 5 Ⅲ-grade mineralized zones relevant to lead-zinc deposit and 7 Ⅳ-grade mineralized zones. There are 12 lead-zinc mineralized zones in this area, of which 7 are important. They are Qiandongshan-Huangboyuan lead-zinc-copper mineralized zone, Yindongzi-Tongmugou silver-lead-zincbarite zone, Dongchuan-Xiaochuan lead-zinc-copper zone, Xitonggou-Banyanzhen lead-zincgold-mercury-antimony zone, Zhaowan-Huangshiban lead-zinc-gold zone, Yangpingguanzhujiaba Paleozoic lead-zine-cobalt-phosphor-sepiolite zone and gold-silver-lead-zinc-coppersulfur zone from Chadianzi in Mianxian-Qingmuchuan in Ningqiang.