Arid
DOI10.1007/s12517-018-3726-9
Benthic foraminiferal turnover across the Paleocene-Eocene Thermal Maximum (PETM) event in Eastern Desert, Egypt
Soliman, Hassan A.; Obaidalla, Nageh A.; Metwally, Amr A.; Mohamed, Azza A.
通讯作者Metwally, Amr A.
来源期刊ARABIAN JOURNAL OF GEOSCIENCES
ISSN1866-7511
EISSN1866-7538
出版年2018
卷号11期号:14
英文摘要

Benthic foraminiferal fauna are analyzed quantitatively and qualitatively at three stratigraphic sections in Eastern Desert of Egypt (Serai, Duwi, and Um El Huetat). These sections embrace the Paleocene-Eocene Thermal Maximum (PETM) interval which is represented by the occurrence of five distinctive beds. These beds constitute the Dababiya Quarry Member at the lower part of Esna Formation. The occurrence of them indicates an expanded and relatively continuous record across the P/E boundary. The organic-rich clay layer (bed no. 1 of the Dababiya Quarry Member) marks the start of the PETM event. This bed is characterized by the extinction of all benthic foraminiferal fauna except for the occurrence of rare agglutinated foraminiferal species. The presence of these species indicates an oceanic anoxic event at the sea floor. High concentration of phosphatic contents including fish remains occurred in the middle part of the PETM (bed nos. 2 and 3 of the Dababiya Quarry Member) with the continuous absence of benthic foraminiferal fauna except for few specimens at the top of bed 3. Bed nos. 4 and 5 of the Dababiya Quarry Member represent the upper part of the PETM and the initial stage of sea floor recovery. Low diversity and abundance of benthic foraminiferal taxa occurred within these beds, represented by Valvulineria scrobiculata, Lenticulina midwayensis, Loxostomoides appliane, and Siphogenerinoides eleganta. This phenomenon continues upward during the post-PETM event. The Paleocene velasco-type benthic foraminifera Angulogavelinella avnimelechi and Coryphostoma midwayensis species are extinct within the advent of the PETM event. The benthic foraminiferal assemblages at the studied sections are dominated by midway-type fauna with little representative of velasco-type fauna. The velasco-type species are represented with high abundance at Serai section and with low densities at Um El Huetat section, while at Duwi section, they rarely occurred. This suggests outer neritic-upper bathyal (150-400 m) setting at Serai section and mostly middle-outer neritic (50-150 m) setting at Um El Huetat and Duwi sections.


英文关键词Paleocene/Eocene boundary Benthic foraminifera Midway-type fauna Velasco-type fauna Paleobathymetry Egypt
类型Article
语种英语
国家Egypt
收录类别SCI-E
WOS记录号WOS:000440103200001
WOS关键词PALAEOCENE/EOCENE BOUNDARY ; SEA ; IMPACT ; BIOSTRATIGRAPHY ; DISSOCIATION ; ASSEMBLAGES ; EXTINCTIONS ; PALEOGENE ; PATTERNS ; DABABIYA
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/2XILL650/207736
作者单位Assiut Univ, Fac Sci, Dept Geol, Assiut, Egypt
推荐引用方式
GB/T 7714
Soliman, Hassan A.,Obaidalla, Nageh A.,Metwally, Amr A.,et al. Benthic foraminiferal turnover across the Paleocene-Eocene Thermal Maximum (PETM) event in Eastern Desert, Egypt[J],2018,11(14).
APA Soliman, Hassan A.,Obaidalla, Nageh A.,Metwally, Amr A.,&Mohamed, Azza A..(2018).Benthic foraminiferal turnover across the Paleocene-Eocene Thermal Maximum (PETM) event in Eastern Desert, Egypt.ARABIAN JOURNAL OF GEOSCIENCES,11(14).
MLA Soliman, Hassan A.,et al."Benthic foraminiferal turnover across the Paleocene-Eocene Thermal Maximum (PETM) event in Eastern Desert, Egypt".ARABIAN JOURNAL OF GEOSCIENCES 11.14(2018).
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