| 摘要: |
| 通过对钻井岩心的观察和遗迹化石的鉴定,在东濮凹陷古近纪沙河街组沙三段发现遗迹化石10属15种,包括:Skolithos vertivalis,Skolithos linearis,Skolithos isp.,Palaeophycus tubularis,Palaeophycus isp.,Planolites montanus,Planolites beverlegensis,Planolites isp.,Mermoides isp.,Taenidium isp.,Teichichnus isp.,Helminthoidichnites tenuis,Helminthopsis isp.,Beaconites isp.和Thalassinoides isp.。根据岩性特征、沉积构造和遗迹化石的组成、分布特征,研究区沙三段主要发育正常三角洲前缘亚相、前三角洲亚相,并划分了反映不同沉积环境和水体深度的2种遗迹组合,分别为Palaeophycus-Planolites遗迹组合和Planolites-Helminthoidichnites遗迹组合。 |
| 关键词: 东濮凹陷 沙河街组 三角洲 遗迹化石 沉积环境 |
| DOI： |
| 附件 |
| 投稿时间：2017-03-09修订日期：2017-04-11 |
| 基金项目:国家自然科学基金项目(41272117);河南理工大学博士基金(B2016-71) |
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| Trace fossils from the normal delta deposits in the third member of the Shahejie Formation in the Dongpu depression and their significance |
| CHANG Long, WANG Chang-zheng, HU Bin, CHEN Chuan-hao |
(1. School of Resources and Environments, Henan Polytechnic University, Jiaozuo 454000, Henan, China;
2. Key Laboratory of Biogenic Traces and Sedimentary Minerals of Henan Province, Jiaozuo 454000, Henan, China) |
| Abstract: |
| The trace fossils from the third member of the Palaeogene Shahejie Formation in the Dongpu depression are divided, on the basis of core observation and trace fossil identification, into 10 genera and 15 species, including Skolithos vertivalis, Skolithos linearis, Skolithos isp. and Palaeophycus tubularis, Palaeophycus isp., Planolites montanus, Planolites beverlegensis, Planolites isp., Mermoides isp., Taenidium isp., Teichichnus isp., Helminthoidichnites tenuis, Helminthopsis isp., Beaconites isp., and Thalassinoides isp. According to lithology, sedimentary structures, and the types and distribution of the trace fossils, the normal delta front subfacies and prodelta subfacies are separated in the third member of the Palaeogene Shahejie Formation. Two trace fossil assemblages are also recognized, including the Palaeophycus-Planolites and Planolites-Helminthoidichnites trace fossil assemblages which have reflected different sedimentary environments and water depths in the study area. |
| Key words: Dongpu depression Shahejie Formation delta trace fossil sedimentary environment |
