安徽无为盆地平衡地质剖面研究  

A STUDY ON THE BALANCED CROSS SECTION OF WU WEI BASIN, ANHUI PROVINCE

作　　者：胡德昭[1] 徐鸣洁[1] 黄钟谨 

机构地区：[1]南京大学地球科学系

出　　处：《高校地质学报》1996年第4期431-436,共6页Geological Journal of China Universities

基　　金：中国石油天然气总公司苏皖油气综合联队"八五"课题

摘　　要：本文对无为盆地一条代表性地震横剖面（地震２８测线）进行了平衡剖面计算，从而建立了盆地基本构造模型及其演化模式。计算结果表明：剖面跨越的仑头背斜实际上是一个多重推覆构造，是由志留系地层叠置形成的；志留系地层叠置造成地层缩短量为７．９ｋｍ，地层缩短率为１７．３％；推覆构造形成的背斜在后期演化过程中经受的剥蚀量达２．５ｋｍ；盆地边界正断层造成的拉张量为５．４ｋｍ，盆地基底的沉降量达３．４ｋｍ。In this paper, based on the representative seismic profile 28, a balanced corss section of Wu Wei basin is made by computer. So the basic style of structure and its evolution model of wu Wei basin is established. The calculated results show that: the Lun tou anticline is a multi bend folding made up of superposed Silurian strata, the shortening of superposed Silurian system is 7.9km, the rate of shortening is 17.3%, the denudation of the fold in late evolutions reaches 2.5km. The tension distance by normal faults situated at the basin boundaries is 5.4km, the subsidence of the basin reaches 3.4km. The study in this paper is in accord with the geological data from neighbouring and deep structures.

关 键 词：无为盆地 平衡剖面 守恒 缩短率 地质剖面 安徽 

分 类 号：P542.3[天文地球—构造地质学]