台前斜坡沉积特征对黄石—广济铅锌(银)矿带的控制

LEAD-ZINC (SILVER)ORE BELT IN HUANBSHI-BUANBJI UNDER THE CONTROL OF FOREPLATFORM SLOPE SEDIMENTARY CHARACTERISTICS

本文着重讨论该地区早三叠世台前斜坡的位置及沉积特征。详细论述了上斜坡塌积角砾岩和滑积角砾岩的特征与区别。在此基础上,阐述了铅锌(银)矿带与塌积角砾岩的成因联系和矿带的分布。

The lead-zinc (silver) ore belt of more than 70 kilometers (long) distributes along the both banks of the Yangzi (formerly Yangtze) river from Huangshi to Guangji,of which the mineralization is closely related to the breccia.For lack of predecessors' comprehensive discussions on breccia genetic type of this area,the real type of ore-bearing breccia and its regional distribution regularities are not quite clear.Through the study of sedimentary facies of this area in recent years,the author puts forward the ore control theory of slide (slip)-collapse breccia.This paper emphasizes (to discuss) the site of foreplatform slope of Early Triassic Epoch in this area and its sedimentary characteristics;details the iden- tification characteristics and distinction between the collapse breccia and slide breccia on the upper slope;and based on this ideas,deals with the genetic connection of the lead-zinc (silver) ore belt with the collapse breccia,the distribution regularities of collapse breccia and its prospect- ing target.