东濮凹陷文留地区沙三中(Es_3~中)遗迹化石与沉积环境  

Trace fossils and sedimentary environments in the middle part of third member Shahejie Formation in Wenliu area,Dongpu Sag

作　　者：胡斌[1,2] 陈传浩[1] 王长征[1] 常龙[1] 

机构地区：[1]河南理工大学资源环境学院,河南焦作454000 [2]河南省生物遗迹与成矿过程重点实验室,河南焦作454000

出　　处：《河南理工大学学报（自然科学版）》2017年第3期40-46,共7页Journal of Henan Polytechnic University（Natural Science）

基　　金：国家自然科学基金资助项目(41272117);河南理工大学博士基金资助项目(B2016-71)

摘　　要：为分析东濮凹陷文留地区沙三中段(Es_3~中)的沉积环境及水深变化规律,采用遗迹学与沉积学相结合的方法,对钻井岩芯的观察和遗迹化石进行鉴定,在东濮凹陷文留地区古近纪沙河街组沙三段中部发现遗迹化石11属16种,划分出4种遗迹组合:Palaeophycus-Planolites遗迹组合,解释其形成于浅湖和扇三角洲前缘环境;Planolite-Mermoides遗迹组合,发育于浅湖较深-半深湖环境;Helminthopsis-paleodictyon遗迹组合,出现于前扇三角洲亚相;HelminthopsisTrichichnus遗迹组合,产生在浊积扇环境。研究成果为预测东濮凹陷油气生、储、盖层的空间展布和指导勘探开发具有重要的现实意义。In order to analyze sedimentary environment and change law of water deepth in the middle part of third member of the Paleogene Shahejie Formation in Wenliu area, Dongpu Sag, the research method of ich- nology and sedimentology is used, through the observation of drilling cores and identification of trace fossils, 11 ichnogenus and 16 ichnospecies are discovered in the study member. These ichnofossils can be divided into 4 ecological types ： Palaeophycus-Planolites ichnoassemblage, appeared in the Shallow lake and fan delta front environment ; Planolite-Mermoides ichnoassemblage is formed in the Shallow lake and semi deep lake environ-ment ; Helminthopsis-paleodictyon ichnoassemblage occurred in the front fan delta environment ; Helminthopsis- Trichichnus ichnoassemblage generated in the turbidity fan environment. The research results not only provide the evidences on palaeoenvironments and palaeobathymetric analysis but also offer new factor formation to pre-dict oil and gas deposits in Dongpu Sag.

关 键 词：东濮凹陷 沙河街组 遗迹化石 遗迹组合 沉积环境 

分 类 号：P512.2[天文地球—地质学]