大兴安岭西坡及邻区银铅锌矿床成矿作用若干问题的讨论

本文概述了大兴安岭西坡及邻区陆相火山岩型银铅锌矿床的基本特征，讨论了该类矿床成矿作用和成矿规律研究中的成矿物质来源、成矿系列和成矿控制因素几个重要问题。认为大兴安岭西坡及俄、蒙邻区的银铅锌矿床，实际上构成了一个与燕山期火山一次火山岩浆活动具有成因联系的银铅锌矿床成矿系列。大兴安岭西坡及邻区燕山中晚期大规模中酸性富碱的火山一次火山岩浆作用是该区这一时期或稍晚银铅锌矿床（可能还包括铜、铝、锡等矿产）集中出现的本质原因和物质基础，它也反映了深部壳慢作用过程中物质分异、聚集和演化的地球化学过程。关键词大…

MAIN CHARACTERISTICS OF Ag-Ph-Zn DEPOSITS AND DISCUSSION ON THEIR MINERALIZATION ON THE WESTERN SLOPE OF THE GREAT HINGGAN MOUTAINS,NE CHINA AND NEIGHBOURING AREA

Continental volcanic Ag--Ph--Zn deposits widely occur in belts and groups in the bordering region among Russia, Mongolia and China. There are a lot of large and superlarge deposits in the region. This paper summarizes main characteristics of this type of deposits onthe western slope of the Great Hinggan Mountains, NE China and its neighbouring regionEmphasis is put on several important problems about genesis and metallogenic regularities ofthis type of deposits, such as mineral sources, metallogenic series and ore--controlling factors. Authors consider that these Ag--Ph--Zn deposts in fact constitute a Ag--Ph--Zn metallogenic series related to the Late Jurassic and Early Cretaceous volcanic and subvolcanic magmatic activities in the bordering region amony China, Russia and Mongolia. The large scaleof Late Jurassic and Early Cretaceous volcanic and subvolcanic alkali--enriched magmatic activities are the essential reason and material basis for the mineralization of Ag--Ph-Zn deposits(probably including Cu,Mo,Sn deposits, etc. ) in the region. These magmatic activities alsoreflect the geochemical process of material differentiation, concentration and evolutionthrough the deep crust--mantle interaction.