干旱区生态环境知识资源中心(Arid): Integrated stratigraphy of the lower Eocene successions on the southern Tethys margin (Egypt): Emphases on the hyperthermal events

Arid

DOI	10.1016/j.marmicro.2022.102131
	Integrated stratigraphy of the lower Eocene successions on the southern Tethys margin (Egypt): Emphases on the hyperthermal events
	Metwally, Amr A.; El-Sheikh, Islam; Mahfouz, Kamel H.
通讯作者	Metwally, AA
来源期刊	MARINE MICROPALEONTOLOGY
ISSN	0377-8398
EISSN	1872-6186
出版年	2022
卷号	173
英文摘要	The early Eocene is marked by prominent short warming episodes that are globally documented. The present study provides a well-established micropaleontological record of the calcareous nannofossils, planktonic, and benthonic foraminifera in order to evaluate the impact of the environmental perturbations across the early Eocene generally and particularly throughout these short warming events. This study has been conducted on two expanded lower Eocene successions at the Dababiya and the El-Ballas sections, southern Egypt. The recorded benthonic foraminifera indicate a deposition in a middle-outer neritic setting for El-Ballas, while at the Dababiya section, the lower part is deposited in an inner-middle neritic setting that changed upward to middle-outer neritic due to sea-level oscillation. The detailed analyses of the identified calcareous nannofossils and foraminifera allow definition of four early Eocene hyperthermal events. These events are the Post-Paleocene Eocene Thermal Maximum (Post-PETM), Eocene Thermal Maximum-2 (ETM-2), H2, and Eocene Thermal Maximum-3 (ETM-3). These events are indicated by a remarkable shift of the calcareous planktonic warm water indicators. The benthonic foraminifera assemblages that were recorded throughout these events reflect partially dysoxic/suboxic marine conditions associated with increased eutrophication probably of mesotrophic marine conditions. The calcareous planktonic and benthonic foraminifera record indicates evidence of minor dissolution across these events. Unlike the PETM, these events had a lesser impact on the environmental marine condition. The integrated data of the present study show that the magnitude of these events was greater and more pronounced at the shallower site at the Dababiya than at the deeper El-Ballas section.
英文关键词	Early Eocene Warming events Calcareous nannofossils Foraminifera Paleoenvironment Egypt
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000809635900001
WOS关键词	PALEOCENE/EOCENE THERMAL MAXIMUM ; BENTHONIC FORAMINIFERAL BIOSTRATIGRAPHY ; CALCAREOUS NANNOFOSSIL RESPONSE ; CRETACEOUS-TERTIARY BOUNDARY ; WESTERN DESERT ; PLANKTONIC-FORAMINIFERA ; KHARGA OASIS ; BENTHIC FORAMINIFERA ; STRATOTYPE-SECTION ; TROPICAL ATLANTIC
WOS类目	Paleontology
WOS研究方向	Paleontology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/393760
推荐引用方式 GB/T 7714	Metwally, Amr A.,El-Sheikh, Islam,Mahfouz, Kamel H.. Integrated stratigraphy of the lower Eocene successions on the southern Tethys margin (Egypt): Emphases on the hyperthermal events[J],2022,173.
APA	Metwally, Amr A.,El-Sheikh, Islam,&Mahfouz, Kamel H..(2022).Integrated stratigraphy of the lower Eocene successions on the southern Tethys margin (Egypt): Emphases on the hyperthermal events.MARINE MICROPALEONTOLOGY,173.
MLA	Metwally, Amr A.,et al."Integrated stratigraphy of the lower Eocene successions on the southern Tethys margin (Egypt): Emphases on the hyperthermal events".MARINE MICROPALEONTOLOGY 173(2022).