干旱区生态环境知识资源中心(Arid): Paleo-environmental reconstructions of the Upper Cretaceous-Paleogene successions, Safaga, Egypt

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DOI	10.1016/j.jafrearsci.2018.08.007
	Paleo-environmental reconstructions of the Upper Cretaceous-Paleogene successions, Safaga, Egypt
	Abu-Ali, Rania 1,2; El-Kammar, Ahmed 1; Zakaria, Ahmed 1; El-Shafeiy, Moataz 1; Kuss, Jochen 2
通讯作者	Abu-Ali, Rania
来源期刊	JOURNAL OF AFRICAN EARTH SCIENCES
ISSN	1464-343X
EISSN	1879-1956
出版年	2019
卷号	149 页码:170-193
英文摘要	The Late Cretaceous-Early Eocene sedimentary sequences in the Central Eastern Desert of Egypt were studied in three shallow boreholes (Wassief, Urn El-Huaitat, and Mohamed Rabah). This study focuses on an integrated investigation of biostratigraphy, lithostratigraphy and some geochemical parameters, to provide important clues to the relative sea-level changes and to interpret the prevailed depositional conditions. Micropaleontological study on planktonic foraminifera allows to identify eight zones, ranging in age from Late Cretaceous to Early Eocene. Three hiatal surfaces have been recognized as evidenced by missing formaniniferal zones: The first spans the Late Maastrichtian-Danian regional unconformity. The second one is recorded in the Late Paleocene. The third one is located at the Late Paleocene-Early Eocene (Thanetian-Ypresian) boundary. The environments of the study foraminiferal parameters range from the non-marine to outer neriticupper bathyal. Petrographically, thirteen Microfacies Types (MFT) have been recorded. Three MFTs constitute the siliciclastic facies; MFT-1; silty to sandy mudstone, MFT-2; organic-rich silty mudstone, and MFT-3; fine-grained sandstone/glauconite intercalations. Two MFTs represent a phosphorite facies which are MFT-4; phosclast packstone to phosclast grainstone and MFT-5; phosooid packstone to phosooid grainstone. Eight MFTs characterize the carbonate facies; MFT-6; non-fossiliferous lime-mudstone, MFT-7; phosphatic foraminiferal pack/grainstone, MFT-8; bioclastic foraminiferal packstone, MFT-9; bioclastic foraminiferal wackestone, MFT-10; glauconitic phosphatic foraminiferal Wack-Packstone, MFT-11; non-fossiliferous dolomitic mudstone, MFT-12; dolomitic glauconitic lime-mudstone, and MFT-13; dolomitic bioclastic wackestone. The depositional environments of the study microfacies range from the terrestrial to open marine outer neritic-upper bathyal. Geochemical parameters have been used to improve the litho- and biostratigraphic framework: the major oxides, TOC wt.% and the Chondrite-normalized REE. Based on the vertical distribution of CaO/P2Os, TiO2/CaO and cerium (Ce)-anomaly, changes in paleo-bottom water redox conditions were reconstructed and correlated with relative sea level changes. Prior to the major transgression during deposition of the Duwi Formation under reducing marine conditions, the prevailing oxic to sub-mdc bottom water terrestrial conditions during deposition of the Quseir Formation.
英文关键词	Late Cretaceous-early eocene boundaries Biostratigraphy Lithostratigraphy Geochemistry Ce anomaly Egypt
类型	Article
语种	英语
国家	Egypt ; Germany
收录类别	SCI-E
WOS记录号	WOS:000449894400012
WOS关键词	RARE-EARTH-ELEMENTS ; NORTH EASTERN DESERT ; RED-SEA ; FORAMINIFERAL BIOSTRATIGRAPHY ; COMPOSITIONAL VARIATIONS ; PHOSPHORITE DEPOSITS ; TECTONIC EVOLUTION ; SOUTHERN TETHYS ; BLACK SHALE ; CONSTRAINTS
WOS类目	Geosciences, Multidisciplinary
WOS研究方向	Geology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/216593
作者单位	1.Cairo Univ, Dept Geol, Cairo, Egypt; 2.Bremen Univ, Dept Geosci, Bremen, Germany
推荐引用方式 GB/T 7714	Abu-Ali, Rania,El-Kammar, Ahmed,Zakaria, Ahmed,et al. Paleo-environmental reconstructions of the Upper Cretaceous-Paleogene successions, Safaga, Egypt[J],2019,149:170-193.
APA	Abu-Ali, Rania,El-Kammar, Ahmed,Zakaria, Ahmed,El-Shafeiy, Moataz,&Kuss, Jochen.(2019).Paleo-environmental reconstructions of the Upper Cretaceous-Paleogene successions, Safaga, Egypt.JOURNAL OF AFRICAN EARTH SCIENCES,149,170-193.
MLA	Abu-Ali, Rania,et al."Paleo-environmental reconstructions of the Upper Cretaceous-Paleogene successions, Safaga, Egypt".JOURNAL OF AFRICAN EARTH SCIENCES 149(2019):170-193.