青海省鄂拉山口多金属矿床成因及成矿模式  

A Genesis and Metallogenic Model of Elashankou Polymetallic Deposit in Qinghai

作　　者：杨宝荣 马忠贤 YANG Baorong;MA Zhongxian(No.8 Team of Geology and Mineral Resources Bureau for Non-ferrous Metals of Qinghai Province,Xingning,Qinghai 810000,China)

机构地区：[1]青海省有色地质矿产勘查局八队,青海西宁810000

出　　处：《中国锰业》2018年第5期147-150,共4页China Manganese Industry

摘　　要：鄂拉山口多金属矿床是近几年来在晚三叠世鄂拉山组陆相火山岩地层中发现的具有一定规模的多金属矿床,从成矿地质条件,地层、构造、岩浆岩以及伴生的围岩蚀变类型、组合、形态分布、矿化特征、矿化分带规律等方面进行了全面分析,厘定了斑岩型矿化与之匹配的空间关系,建立了鄂拉山口"蘑菇状"成矿模式图,体现了源—运—储三位一体思想,明确了矿床类型,有望实现本区找矿新突破。Elashankou polymetallic deposit is a polymetallic Triassic Elaishan formation continental volcanic strata in structures from the metallogenic geological conditions. The deposit of a certain scale that has been found in the late recent years. We have made an analysis of strata, alteration types, including assemblages, morphological distribution, mineralization characteristics and mineralization zonation rules of magmatic rocks, are associated in surrounding rocks. All are comprehensively analyzed. The spatial relationship between porphyry type mineralization and its matching is determined. The model map of ＂ mushroom shaped ＂ mineralization in Elashankou is established, which embodies the idea of ＂ source-transportation-reservoir＂. It defines the type of ore deposit, as is expected to achieve a new breakthrough of prospecting in this area.

关 键 词：围岩蚀变 次火山岩 斑岩 成矿模式 

分 类 号：P618.2[天文地球—矿床学]