赣南东部银坑-青塘地区上施组硅质白云岩特征及其找矿意义

在赣南东部银坑－－青塘地区广泛分布晚元古代地层，近年普查找矿发现青白口纪上施组地层有两层典型硅质白云岩层，该白云岩层层位稳定，特征明显，并与本地区的铅锌矿床关系密切。本文主要从硅质白云岩层和层控铅锌矿床的一些基本特征入手，阐述了它们之间的相互关系，明确指出上施组硅质白云岩层对寻找富铅锌矿床具重要的意义。

CHARACTERISTICS OF SILICEOUS DOLOMITE OF SHANGSHI FORMATION IN YINKENG-QINGTANG AREA IN THE EAST PART OF SOUTHERN JIANGXI AND ITS SIGNIFICANCE IN ORE -HUNTING

Late Proterozoic strata are widely distributed in the Yinkeng-Qingtang area in east part of Southern Jiangxi. Prospecting and ore-hunting activities in recent years have found that two typical siliceous dolomite beds occur in the Shangshi Formation of Qingbaikou Period, which are persistent in horizon and which display remarkable characteristics of their own and bear an intimate relationship with the lead-zinc deposits of this area. Based on some basic characteristics of these siliceous dolomite beds and the strata-bound lead-zinc deposits of this area, this paper deals with their interrelationship, and points out clearly that the Shangshi Formation siliceous dolomite bed has an important significance in the searching for rich lead-zinc deposits.