安徽沿江地区中三叠世砾岩成因再讨论  

Re-discussion on the Middle Triassic Braccia Petrogenesis along the Yangtze River Areas in Anhui Province

作　　者：王朝[1] 储东如[1] 刘家云[1] 徐锦龙[1] 

机构地区：[1]安徽省地质调查院,安徽合肥230001

出　　处：《资源环境与工程》2017年第2期136-141,共6页Resources Environment & Engineering

基　　金：安徽省国土资源厅公益性地质科技项目--安徽沿江地区印支运动构造界面厘定和构造样式调查的资助

摘　　要：中三叠世周冲村组砾岩作为研究金子运动存在与否的重点之一,其成因争议较大。本次研究发现安徽沿江地区该段砾岩存在多种成因,而并非前人认为的属单一的膏溶或岩溶成因。下部砾石以斜坡重力流、膏溶、岩溶及洞穴垮塌成因为主,上部砾石以搬运成因为主,且周冲村组沉积相与上覆黄马青组沉积相迥异,说明两者之间存在着明显的沉积转换界面。As one of the key points on the existence of Jinzi Movement research, geologists had a bitter controversy over the breccias petrogenesis of Zhouchongcun Group in the Middle Triassic. In this study, multiple types of petrogenesis a- bout the mentioned breccias have been discovered in the area along the Yangtze River of Anhui, rather than the gypsum- cause or karst-cause which is the single one in predecessors＇ studies. The gravity-flow on slopes, gypsum-cause, karst- cause and cave-collapse make the major contributions of petrogenesis in the lower part breccias, and transport function is the main petrogenesis in the upper part breccias, and there have a lot of differences about the sedimentary faces between Zhouchongcun Group and surfaces between them. Huangmaqing Group which can indicate the apparently existence of sedimentary transformation

关 键 词：安徽沿江地区 中三叠世 周冲村组 砾岩 金子运动 

分 类 号：P588.212.5[天文地球—岩石学] P534.51[天文地球—地质学]