摘要
秭归盆地底部地层与下伏巴东组间的接触关系,本文根据1:25万神农架幅野外踏勘、填图路线及对前人资料的分析,认为两者之间其界面自西向东由整合接触、平行不整合,直至超覆不整合接触。其界面代表了沉积环境和沉积相的重大变革,即印支运动。下部巴东组总体为海陆交互相沉积,而秭归盆地则转为内陆盆地沉积。该界面性质的确定为研究秭归盆地形成与演化提供了基础。
Based on the geological survey results of 1 ： 250000 Shennongjia Sheet, it is advanced that the contact plane between the bottom strata of Zigui basin and its underlying strata-- Badong Formation shows conformity, parallel unconformity and unconformity of overlap from western to eastern, which reveals the significant change of sedimentary environment and sedimentary facies caused by Indosinian movement occurred right at that time. Badong Formation is the result of continental - oceanic interactive facies sedimentary and Zigui basin is the result of intracontinental basinal depositing.
出处
《资源环境与工程》
2005年第4期257-267,共11页
Resources Environment & Engineering
关键词
秭归盆地
层序地层
盆地演化
Zigui basin
Sequence strata
Basin evolution
