Late Cretaceous–Early Paleogene tectonic events at Farafra-Abu Minqar Stretch, Western Desert, Egypt: results from calcareous plankton

Faris, Mahmoud; Obaidalla, Nageh A.; Metwally, Amr A.; Salman, Abdelhamid M.; Zaky, Amr S.

doi:10.1007/s12517-018-3787-9

Cited by 14 publications

(4 citation statements)

References 23 publications

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“…The boundary between the Palaeocene and Eocene series in the present study is regarded as an unconformity surface, which is comparable with the SB Th6 on the global sea‐level chart (Hardenbol et al, ). It is of great impact and documented in several studies (Alqudah, Monzer, Sanjuan, Salah, & Alhejoj, ; Faris, Obaidalla, Metwally, Salman, & Zaky, ; Farouk, ; Farouk et al, ; King, ; Kuss et al, ; Sharland et al, ; Sluijs et al, ). However, a hiatus has been reported accompanying this boundary as evidenced by the absence of the lowermost part of the Dababiya Quarry Member (Figure ).…”

Section: Discussionmentioning

confidence: 99%

Upper Palaeocene–lower Eocene succession of the Kharga Oasis, Western Desert, Egypt: Foraminiferal biostratigraphy and sequence stratigraphy

2019

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The present study provides a better understanding of the nature of the upper Palaeocene-lower Eocene succession within the framework of the sequence stratigraphy. It is based on the qualitative and quantitative analyses of the foraminiferal assemblages of the Esna and El-Rufuf formations at the Kharga Oasis, Western Desert. Seven planktonic foraminiferal zones were recognized; P4c and P5 zones of the late Palaeocene (Thanetian) age and E1-E5 zones of the early Eocene (Ypresian) age. The Palaeocene/Eocene (P/E) boundary is recorded at the base of the Dababiya Quarry Member of the Esna Formation that coincides with the P5/E1 zonal boundary.A minor hiatus has been documented across this boundary equivalent to the missing lowermost part of the Dababiya Quarry Member. The foraminiferal investigations (e.g., planktonic percentage, benthic foraminifera cluster analyses, diversity, and abundance) as well as field work and the lithofacies examination have been integrated to subdivide the studied succession into five third-order depositional sequences separated by five sequence boundaries. These sequences are primarily formed in response to the greater impact of the global sea-level oscillations, as well as the partial effect of the regional tectonics, which may be related to the influence of the Syrian Arc system.The regional tectonics led to occasional discrepancies in the timing and extent of some changes in the relative sea-level and mismatching of some boundaries.

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Section: Discussionmentioning

confidence: 99%

Upper Palaeocene–lower Eocene succession of the Kharga Oasis, Western Desert, Egypt: Foraminiferal biostratigraphy and sequence stratigraphy

2019

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“…The base of Selandian Stage's Global Stratotype Section and Point (GSSP) were chosen at Zumaia in northern Spain (Schmitz et al, 2011). During Paleocene, short-lived warming episodes were encountered that resulted sedimentological, paleontological, geochemical and climatic variations (Thomas et al, 1999;Speijer, 2003a, b;Arenillas et al, 2008;Quillévéré et al, 2008;Sprong et al, 2011Sprong et al, , 2012Sprong et al, , 2013Schmitz et al, 2011;Dinarès-Turell et al, 2012;Monechi et al, 2013;Kasem et al, 2017;Faris et al, 2018;Kasem et al, 2022). These events include Danian ⁄Selandian (D/S) transition (Schmitz et al, 2011), and the Mid Paleocene Biotic Event (MPBE) (Bernaola et al, 2007).…”

Section: Introductionmentioning

confidence: 99%

“…These events include Danian ⁄Selandian (D/S) transition (Schmitz et al, 2011), and the Mid Paleocene Biotic Event (MPBE) (Bernaola et al, 2007). These warming episodes had been characterized by drops in carbon isotope excursions (CIEs) and the level of carbonate, as well as variations in calcareous nannofossil assemblages (Dupuis et al, 2003;Aubry et al, 2007;Bernaola et al, 2007;Schmitz et al, 2011;Soliman et al, 2014;Karoui-Yaakoub et al, 2016, Kasem et al, 2017Faris et al, 2018, andAbu Shama et al, 2020). The negative δ 13 C excursions are usually interpreted as a response to increase in paleotemperature (Bornemann, 2003), possibly a carbon reservoir added more 13 C to the water and atmosphere (Dickens et al 1997).…”

Section: Introductionmentioning

confidence: 99%

Lithostratigraphy, Stable Isotope Stratigraphy and Calcareous Nannofossils Biostratigraphy of the Danian-Thanetian at Nukhul, Sinai, Egypt

Kasem

2023

Frontiers in Scientific Research and Technology

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Paleocene sediments exposed at Nukhul, Sinai, Egypt were subjected to a detailed calcareous nannofossil biostratigraphy besides tracking changes in carbonate contents, δ 13 C and δ 18 O values. This Paleocene outcrop extends through the Dakhla -Tarawan formations. About 8.5 m of Dakhla F. consists of grey calcareous shale, and 2 m from the Tarawan F. consists of yellowish argillaceous limestone were investigated. Five calcareous nannofossil zones (NP2/3 -NP7/8) were delineated. The Late Danian Event was traced at a level characterized by an abrupt decrease in carbonate content and δ 18 O values, and minimum values of calcareous nannofossil's diversity and abundance that support warming conditions during this interval. The Danian/Selandian contact was placed in coincidence with the base of Zone NP5. No remarkable changes in lithology or in δ 13 C and δ 18 O values were noted close to this boundary except an abrupt drop in δ 18 O values just below it and increase in δ 13 C values slightly above this level. A distinct drop in carbonate content and calcareous nannofossil diversity was documented close to this boundary indicating warming episode. Calcareous nannofossils indicate a hiatus within Danian at Nukhul. The Selandian/Thanetian boundary was placed in coincidence with the base of NP7/8 combined Zone. No remarkable change in lithology, calcareous nannofossil assemblage, or δ 13 C and δ 18 O values were recorded across this boundary except the sudden drops in δ 13 C and δ 18 O values slightly below and above it. Calcareous nannofossils, δ 13 C and δ 18 O data reflect an upward increase in paleotemperature throughout the Paleocene at Nukhul.

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“…The Paleocene Epoch (Series) has been formally divided into Danian, Selandian, and Thanetian Stages [1,2]. This epoch was characterized by short and extremely warm episodes (known as hyperthermal events) associated with sedimentological and isotopic changes as well as variations in calcareous nannofossil assemblages [3][4][5][6][7][8][9]. These Paleocene events comprise the Late Danian Event (LDE) [10][11][12][13]; the Danian/Selandian (D/S) transition event [14,15]; the early-late Paleocene event (ELPE, [3]), also known as the mid-Paleocene biotic event (MPBE, [4]); and likely part of the long-lasting environmental disruption during the Paleocene (i.e., the Selandian-Thanetian Transition Event, STTE, [8]).…”

Section: Introductionmentioning

confidence: 99%

Biostratigraphy and Paleoenvironmental Reconstruction at the Gebel Nezzazat (Central Sinai, Egypt): A Paleocene Record for the Southern Tethys

et al. 2022

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The variations in assemblages of calcareous nannofossils are tracked in the Dakhla and Tarawan Formations exposed at Gebel Nezzazat (central Sinai, Egypt). Five calcareous nannofossil biozones, namely NP2/3, NP4, NP5, NP6, and NP7/8 are identified. A distinct marker bed related to the Latest Danian Event (LDE) occurs within the Dakhla Fm. The earliest representative of fasciculiths, Lithoptychius schmitzii, first occurs just below the LDE distinct bed and is followed by the Los of Diantholitha alata, D. mariposa, L. varolii, L. felis, and L. collaris. The abundance of calcareous nannofossils drops within the LDE distinctive bed. The base of Selandian Stage is here approximated at the base of Zone NP5 in concurrence with a sudden drop in the abundance of calcareous nannofossils. No considerable lithological changes are noted across this transition. The absence of subsequent occurrences of L. ulii, L. janii, L. billii, and L. stegostus suggest inconsistent lowest occurrences (Los) of these taxa, insufficient sampling resolution, and/or a hiatus. The base of Thanetian is approximated with the base of Zone NP7/8 in the topmost of Dakhla Fm. No considerable changes in calcareous nannofossil assemblages are associated in correspondence to this transition except the LO of D. mohleri, lowest continuous occurrence (LctO) of Bomolithus megastypus, and the increase in abundance of Heliolithus kleinpellii as well as a sudden drop in abundance within Zone NP7/8. The variations in calcareous nannofossil assemblages at Gebel Nezzazat suggest prevailing warm-water and oligotrophic conditions during the Paleocene and particularly along the Danian Stage that are interrupted by minor fluctuations in paleoclimatic conditions. In particular, the Danian–Selandian transition marks a decrease in warm and oligotrophic conditions that persisted along the Selandian Stage. The Selandian–Thanetian transition shows an increase of warm and oligotrophic conditions prevailed in the Thanetian record. The sudden decrease in abundance of calcareous nannofossils in both the Selandian and Thanetian is likely resulted from an increase in dissolution of carbonates rather than variations in the paleotemperature and/or paleofertility.

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Late Cretaceous–Early Paleogene tectonic events at Farafra-Abu Minqar Stretch, Western Desert, Egypt: results from calcareous plankton

Cited by 14 publications

References 23 publications

Upper Palaeocene–lower Eocene succession of the Kharga Oasis, Western Desert, Egypt: Foraminiferal biostratigraphy and sequence stratigraphy

Upper Palaeocene–lower Eocene succession of the Kharga Oasis, Western Desert, Egypt: Foraminiferal biostratigraphy and sequence stratigraphy

Lithostratigraphy, Stable Isotope Stratigraphy and Calcareous Nannofossils Biostratigraphy of the Danian-Thanetian at Nukhul, Sinai, Egypt

Biostratigraphy and Paleoenvironmental Reconstruction at the Gebel Nezzazat (Central Sinai, Egypt): A Paleocene Record for the Southern Tethys

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