摘要
在1∶25万区域地质调查基础上,通过对宿松 东至地区南华纪—志留纪地层露头剖面研究,对其相应的沉积环境、沉积相进行了分析,并根据生物地层、岩石地层和年代地层等成果,将南华纪—志留纪地层划分为1个一级层序,5个二级层序和15个三级层序组。一级和二级层序在沉积相序上总的趋势表现为浅→深→浅的变化,且与海平面变化曲线相吻合;三级层序组海平面上升和下降往往受构造运动、海平面变化、冰川事件影响。
The stratigraphic sections of the NanhuanSilurian stratigraphic outcrops and their sedimentary environments and facies in the SusongDongzhizone, Anhui are discussed on the basis of the 1∶250000 regional geological survey. The NanhuanSilurian strata may be divided into one firstorder sequence, five secondorder sequences and fifteen thirdorder sequence sets. The former two of sequence orders exhibit an overall shallowingdeepeningshallowing trend upsection, which is in accordance with sealevel curves. The sealevel fluctuations within the last ones are commonly constrained by tectonism, sealevel changes and glaciation.
出处
《沉积与特提斯地质》
CAS
CSCD
2003年第1期45-52,共8页
Sedimentary Geology and Tethyan Geology
基金
国土资源大调查项目——1:25万太湖幅区域地质调查,编号:0100134102
