干旱区生态环境知识资源中心(Arid): The Maastrichtian-Danian transition in the northern Farafra Oasis, Western Desert (Egypt): Implications from foraminiferal paleobathymetry and paleoenvironmental reconstructions

Arid

DOI	10.1016/j.jafrearsci.2020.103853
	The Maastrichtian-Danian transition in the northern Farafra Oasis, Western Desert (Egypt): Implications from foraminiferal paleobathymetry and paleoenvironmental reconstructions
	Zaky, Amr S.; Kaminski, Michael A.; Coccioni, Rodolfo; Farouk, Sherif; Khalifa, Mohamed A.; Papazzoni, Cesare A.; Abu El-Hassan, Mohamed M.; Frontalini, Fabrizio
通讯作者	Zaky, AS
来源期刊	JOURNAL OF AFRICAN EARTH SCIENCES
ISSN	1464-343X
EISSN	1879-1956
出版年	2020
卷号	168
英文摘要	Two exposed sections of the Lower/Upper Maastrichtian to Danian at northern and northeastern Farafra Oasis, Western Desert (Egypt) namely, the Farafra-Ain Dalla road and the Ain Maqfi sections have been analyzed for their planktonic and benthonic foraminifera to constrain the biostratigraphy and infer the paleoenvironmental conditions. Lithostratigraphically, the successions of the present study are classified into the Khoman Chalk and the Dakhla Shale. Biostratigraphically, six planktonic foraminiferal zones; Gansserina gansseri, Racemiguembelina powelli and Plummerita reicheli of the Maastrichtian as well as the Praemurica inconstans (P1c), Praemurica uncinata (P2) and Morozovella angulata (P3a) of the Danian are recognized. A detailed quantitative benthonic foraminiferal analysis has been performed and yields a total of 172 identified benthonic foraminiferal species belonging to 62 different genera. The various foraminiferal parameters as well as cluster analysis provide good information about the paleoenvironmental conditions and sea-level fluctuations across the Maastrichtian-Danian transition. The Maastrichtian revealed outer neritic shelf with slightly shallowing conditions recorded only at the Ain Maqfi section, well oxygenated conditions with low organic matter influx coupled with sea-level rise. During the Maastrichtian-Danian transition, a paleoenvironmental shift to innershallow middle neritic shelf, low oxygenated conditions with moderate organic matter influx coupled with sea-level fall is interpreted. This transition is characterized by a major hiatus due to absences of Guembelitria cretacea (P0), Parvularugoglobigerina eugubina (P alpha), Parasubbotina pseudobulloides (P1a) and Subbotina triloculinoides (P1b) zones and subzones. It is well marked in the field by an irregular contact and conglomeratic phosphatic dolostone bed at the Farafra-Ain Dalla road section while the disconformity surface can be detected by planktonic foraminifera in the Ain Maqfi section. The lowermost Danian is phosphatic argillaceous chalky limestone with intensive reworking. Low oxygen and/or relatively high-moderate organic matter influx within inner-middle neritic shelf paleoenvironmental conditions can be reconstructed for the lowermost Danian associated with a slight increase in sea-level during the Praemurica inconstans (P1c) zone. The uppermost Danian reflected very well oxygenated conditions and/or low organic matter influx in middle-outer neritic shelf conditions associated with sea-level rise during ages of the planktonic foraminiferal zones P2-P3a.
英文关键词	Foraminifera Biostratigraphy Paleoenvironment Maastrichtian-Danian transition Farafra Oasis Egypt
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000540173100011
WOS关键词	CRETACEOUS-TERTIARY BOUNDARY ; SEA BENTHIC FORAMINIFERA ; PLANKTONIC-FORAMINIFERA ; SEQUENCE STRATIGRAPHY ; MASS EXTINCTION ; LEVEL CHANGES ; OXYGEN INDEX ; BLAKE NOSE ; PALEOCENE ; BIOSTRATIGRAPHY
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/2XILL650/324738
作者单位	[Zaky, Amr S.; Khalifa, Mohamed A.; Abu El-Hassan, Mohamed M.] Menoufia Univ, Fac Sci, Geol Dept, Shibin Al Kawm 32511, Egypt; [Kaminski, Michael A.] King Fahd Univ Petr & Minerals KFUPM, Geosci Dept, Dhahran 31261, Saudi Arabia; [Zaky, Amr S.; Coccioni, Rodolfo; Frontalini, Fabrizio] Urbino Univ, Dept Pure & Appl Sci DiSPeA, Urbino, Italy; [Farouk, Sherif] Egyptian Petr Res Inst, Nasr City, Egypt; [Papazzoni, Cesare A.] Modena & Reggio Emilia Univ, Dept Chem & Geol Sci, Modena, MO, Italy
推荐引用方式 GB/T 7714	Zaky, Amr S.,Kaminski, Michael A.,Coccioni, Rodolfo,et al. The Maastrichtian-Danian transition in the northern Farafra Oasis, Western Desert (Egypt): Implications from foraminiferal paleobathymetry and paleoenvironmental reconstructions[J],2020,168.
APA	Zaky, Amr S..,Kaminski, Michael A..,Coccioni, Rodolfo.,Farouk, Sherif.,Khalifa, Mohamed A..,...&Frontalini, Fabrizio.(2020).The Maastrichtian-Danian transition in the northern Farafra Oasis, Western Desert (Egypt): Implications from foraminiferal paleobathymetry and paleoenvironmental reconstructions.JOURNAL OF AFRICAN EARTH SCIENCES,168.
MLA	Zaky, Amr S.,et al."The Maastrichtian-Danian transition in the northern Farafra Oasis, Western Desert (Egypt): Implications from foraminiferal paleobathymetry and paleoenvironmental reconstructions".JOURNAL OF AFRICAN EARTH SCIENCES 168(2020).