The Cretaceous (Barremian-Maastrichtian) palynostratigraphy and palynofacies of the Drazia-1 well, North Egypt

Ela, Nabil M. Aboul; Tahoun, Sameh S.; Raafat, Aya

doi:10.1080/01916122.2018.1510858

Cited by 18 publications

(7 citation statements)

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“…For age assessment, the top occurrence and/or its equivalents (e.g., first downhole occurrence) of the documented index palynomorphs taxa were effectively used for ditch samples (cf. Aboul Ela, Tahoun, & Raafat, ). Various palynological contributions characterize the upper part of the Kharita Formation and identified the Cretacaeiporites densimurus – Concavissimisporites punctatus Interval Zone for the late Albian based on the last occurrence of C. densimurus that demarcated the upper Albian deposits compared to the first occurrence of C .…”

Section: Discussionmentioning

confidence: 99%

“…punctatus that defined the middle Albian strata in northern Egypt (cf. Aboul Ela et al, ; El Shamma, Obied, & Mohammed, ; Gentzis, Carvajal‐Ortiz, Tahoun, Deaf, & Ocubalidet, ; Tahoun, Mostafa, Makled, & Saleh, ). Thus, the highest occurrence of C .…”

Section: Discussionmentioning

confidence: 99%

“…Based on the discriminated palynofacies assemblages, the PFA‐1 is mainly dominated by pteridophyte spores and pollen grains. Specific groups of spores and pollen grains community were widely used as indicators of the environment of deposition (Aboul Ela et al, ; Mansour & Tahoun, ). The predominance of psilatrilete spores, including Cyathidies , Deltoidospora , and Cicatricosisporites groups (Appendix S1) were growing on wet biotopes under warm conditions (Kedves, ; Schrank & Mahmoud, ), reveals deposition adjacent to active terrigenous input.…”

Section: Discussionmentioning

confidence: 99%

“…The marsilean Crybelosporites that grown in fern bog and/or freshwater settings has common occurrence within the PFA‐1 (Appendix S1), reinforcing deposition nearby conspicuous terrestrial influx (Schrank & Mahmoud, ; Thusu, Van der Eem, El Mehdawi, & Bu‐Argoub, ). Besides, the quantitative abundance of the pollen grains is moderate in PFA‐1 and represented by relatively higher percentage of the sphaeroidal gymnosperms Classopollis , Araucariacites , and Inaperturopollenites groups, which increase toward a basinward direction compared to lower abundances in high‐energy proximal marine settings (Aboul Ela et al, ; Tyson, ). The angiosperm Afropollis group reinforce deposition under more local coastal humidity conditions (Mansour & Tahoun, ; Schrank, ).…”

Section: Discussionmentioning

confidence: 99%

“…The density stratification of the water column can be traced in this study based on various palynomorphs groups, either freshwater algae or pteridophytic spores that were preserved within the rock record (Figure ). The relative abundance of freshwater chlorococcales as well as pteridophytic spores is not only advantageous for environmental, ecological, and sequence stratigraphic studies (Aboul Ela et al, ; Kedves, ; Mahmoud & Moawad, ; Mohamed et al, ; Prauss, ; Schrank & Mahmoud, ; Tahoun et al, ) but can also be of great importance for indicating stratification conditions. Similar approaches from the low‐latitude Tarfaya Basin, North Atlantic (Prauss, ) and southern Tethys, Abu Gharadig Basin (Mansour et al, ) relied on freshwater Botryococcus and Pediastrum algae and dinocysts to indicate the prevalent thermohaline density stratified conditions during the Late Cretaceous.…”

Section: Discussionmentioning

confidence: 99%

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Geochemistry and palynology of the upper Albian at the Abu Gharadig Basin, southern Tethys: Constraints on the oceanic anoxic event 1d

et al. 2020

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The mid‐Cretaceous period was a time of abnormal polar temperature warming and consequent global oceanic anoxia that enhanced the widespread accumulation of organic matter‐rich marine sediments. The current contribution focuses on the late Albian oceanic anoxic subevent 1d (OAE 1d) that represents a period of increased perturbation of the global carbon cycle. Palynological and geochemical investigations, including TOC/Rock‐Eval pyrolysis and stable carbon isotope of organic matter (δ13CTOC), were conducted for the upper part of the Kharita Formation from the Abu Gharadig Basin, north Western Desert, Egypt, to (a) confirm the age of this unit, (b) assess the depositional environments and prevalent redox conditions, and (c) confirm the occurrence of the OAE 1d within the sedimentary record in this part of the southern Tethys. Based on the TOC content and Rock‐Eval pyrolysis parameters, the organic matter in the upper Kharita Formation is expected to have a limited hydrocarbon generation potential consisting of gas only. The sedimentation patterns and role of continental weathering and runoff influx were assessed through trace element ratios and relationships. Redox conditions were interpreted based on Stotal–TOC relationship, Stotal–TOC–Fetotal ternary plot, Rock‐Eval S2, trace element proxies and relationships (including Cr vs. V + Ni, V/Cr vs. Stotal, and Stotal/Fe vs. Mn/Stotal). The ratio of TOC/Ptotal was implemented to assess both marine primary productivity and oceanic anoxia during this period. Biostratigraphic constraints showed that the upper part of the Kharita Formation spanned a late Albian age (Cretacaeiporites densimurus Interval Zone). Results showed that the OAE 1d was characterized by organic matter deposition during dysoxic‐suboxic to anoxic redox conditions in a fluvio‐deltaic to shallow marine depositional environment in this part of the Tethys. A low to moderate primary productivity was also prevalent during a fairly high rate of sediment accumulation. Regional correlation of positive δ13CTOC excursion during the OAE 1d throughout the Tethys and Atlantic oceans matched well, in several parts, with the current study interval that confirm the global distribution of the OAE 1d. In this region of the southern Tethys, an overall collapse of water column stratification during the OAE 1d principally related to decreased terrestrial input at low relative sea level, as evidenced from freshwater algae Pediastrum and pteridophyte spore Crybelosporites pannuceus; however, orbital forcing likely induced monsoonal activity at low‐latitudes in the SE, N, and W Tethys.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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Geochemistry and palynology of the upper Albian at the Abu Gharadig Basin, southern Tethys: Constraints on the oceanic anoxic event 1d

et al. 2020

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Palynofacies analysis and depositional environments of Upper Cretaceous sediments in the ST‐9H well, offshore South Tano Basin, Western Ghana

Achaegakwo

Atta-Peters

2021

Geological Journal

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Palynofacies analyses were carried out on 43 cutting samples from the ST 9H well in the Tano Basin, with the view of reconstructing the palaeoenvironment of the Upper Cretaceous sediments in the well. The stratigraphic distribution of the palynofacies assemblages defined four palynofacies units. Palynofacies PA reflects deposition in near shore/shallow marine (inner neritic) environment under distal dysoxic-anoxic shelf condition. Palynofacies PB was deposited in an inner-middle neritic environment under mud-dominated oxic shelf conditions, Palynofacies PC in an open marine (outer neritic) environment under distal suboxic-anoxic basin conditions, and Palynofacies PD in a proximal-marginal marine environment under dysoxic-anoxic basin conditions. These palynofacies assemblages (PA-PD) are characterized by kerogen types II (oil prone), III-IV (gas prone), II > I (oil prone), and III (gas prone), respectively. Marker dinoflagellate and miospore assemblages recovered from the sediments -are indicative of a Campanian-Maastrichtian age. The palaeofloral association and the perideanacean dinocysts assemblage are typical of Senonian Palme Province and the Malloy suite, respectively. These assemblages are indicative of a warm and humid tropical-subtropical climatic condition.

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High-Resolution Palynostratigraphy and Palynofacies of the Upper Cretaceous and K/Pg Boundary, SE Sirt Basin, Libya: A Case Study

El-Mehdawi

2022

Advances in Science, Technology &Amp; Innovation

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The Cretaceous (Barremian-Maastrichtian) palynostratigraphy and palynofacies of the Drazia-1 well, North Egypt

Cited by 18 publications

References 29 publications

Geochemistry and palynology of the upper Albian at the Abu Gharadig Basin, southern Tethys: Constraints on the oceanic anoxic event 1d

Geochemistry and palynology of the upper Albian at the Abu Gharadig Basin, southern Tethys: Constraints on the oceanic anoxic event 1d

Palynofacies analysis and depositional environments of Upper Cretaceous sediments in the ST‐9H well, offshore South Tano Basin, Western Ghana

High-Resolution Palynostratigraphy and Palynofacies of the Upper Cretaceous and K/Pg Boundary, SE Sirt Basin, Libya: A Case Study

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