作　　者： ; ; ;

机构地区： 河南理工大学资源环境学院

出　　处： 《河南理工大学学报（自然科学版）》 2013年第6期691-696,共6页

摘　　要： 在东濮凹陷古近系沙河街组沙三段中的细粒浊流沉积物中发现了图案型痕迹化石,确认属于耕作迹中Paleodictyon古网迹属痕迹化石中的P.(Glenodictyon)(窝网迹)和P.(Squamodictyon)(鳞网迹)2个亚属.通过与国内外相关资料的对比,认为研究区发现的样本为海相痕迹化石,这就证明研究区在古近纪时期存在海洋环境.这是佐证东濮凹陷乃至渤海湾盆地在古近纪存在海侵的重要证据,对这一盆地的古环境分析及未来的油气勘探具有一定的指导意义. Graphoglyplids trace fossils were found in turbidite mudstones in the 3rd member of Shahejie forma- tion in Dongpu Depression and confirmed that they belong to Paleodictyon of Agrichnia, attributted to P. （Glenodictyon） and P. （Squamodictyon） sub-iehnogenus respectively. By the comparison to relevant pub- lished information, the authors suggest that the trace fossil specimens found in the study area are marine ones, which means that in Paleogene exists marine environments. This is an important evidence to prove that in the Dongpu Depression and even all Bohai bay basin there exist transgressions in Paleogene. It is of significant for environmental analysis and oil as well as gas exploration in this basin in future.

关 键 词： 古近纪 沙河街组 图案型遗迹化石 东濮凹陷

领　　域： [天文地球] [天文地球]