摘要
安徽明光盆地第三纪沉积物以陆相红色类磨拉石建造为主 ,晚期覆盖陆相火山岩建造 ,通过对陆相红色类磨拉石建造的分析表明其形成于冲积扇和扇前河湖环境。在对明光盆地内各类陆相沉积建造的沉积环境、沉积相、陆相沉积体系域和地层层序界面的分析基础上 ,根据盆地的充填沉积序列划分出 5个层序 (三级层序 ) ,由于受到构造运动的影响 ,其层序发育皆不完整。在对其进行层序地层学分析的基础上 ,初步建立了明光盆地的地层格架。
The Tertiary sediments in the Mingguang basin of Anhui Province are dominated by red molasses which is covered by the volcanic rocks of continental facies.Analysis of the molasse formation demonstrates that the red molasse was formed in a alluvial fan or a fluviolacustrine environment. Through analyses on the sedimentary environment,sedimentary facies ,continental sedimentary systems and the sequence boundaries between the strata,five strata sequences of the basin are devided .The strata sequences are not completely developed,because of the affects of tectonic events. The framework of the stratigraphic sequence is preliminarily set up for the sedimentary basin on the base of the sequence stratigraphy analysis.
出处
《现代地质》
CAS
CSCD
2002年第4期374-381,共8页
Geoscience
关键词
第三系
沉积相
层序地层
地层格架
明光盆地
安徽
沉积环境
Tertiary
sedimentary facies
sequence and boundary
sequence stratigraphy
stratum regime
the Mingguang basin
Anhui Province
