Sequence stratigraphy and biozonation of the Upper Eocene Anqabiya Formation, Gebel Anqabiya, Egypt

Hewaidy, Abdel Galil A.; Ayyad, Haitham M.; El-Moghny, Mohamed W. Abd; Gameel, Osama

doi:10.1007/s12303-018-0056-6

Cited by 5 publications

(6 citation statements)

References 43 publications

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“…It was described in the field as a pale yellow hard limestone (Figure 2). This microfacies is texturally formed from allochems represented principally by microfossils, algae, and quartz grains constituting less than F I G U R E 5 Stratigraphic interpretations and relative sea-level curve of the Miocene successions in the Sadat Area, North-West Gulf of Suez, and the correlation between the relative sea-level curves derived in this study and the Western European sea-level curve (Hardenbol et al, 1998) 10% of the rock (Figure 6m-o this microfacies type, following Wilson (1975), Flügel (2010), andHewaidy et al (2019).…”

Section: Sandy Algal Bioclastic Packstonementioning

confidence: 57%

“…Most shell fragments of these allochems are filled with iron‐oxide minerals (Figure 6m–o). The abundance of echinoids, bivalve shell fragments, and the rare presence of quartz grains imply a shallow inner‐shelf depositional environment for this microfacies type, following Wilson (1975), Flügel (2010), and Hewaidy et al (2019).…”

Section: Resultsmentioning

confidence: 92%

“…We performed cluster analysis of our data to reveal the tendencies in the assemblage compositions and better identify the taxa's ecological preferences. The cluster analysis is based on the percentage frequency of nannoplankton and foraminifera and has been approved as a robust tool for ecological analyses of these assemblages and their distribution in different samples (Ayyad, 2018; Ayyad et al, 2018; Couapel, Beaufort, Jones, & Chivas, 2007; Gevirtz, Park, & Friedman, 1971; Hewaidy et al, 2019). In addition, this analysis contributes to the exploration of the relations within taxa and the samples collected from the studied succession and to the visualization of differences between the defined assemblages, following Clarke and Warwick (1994), Grunert et al (2012) and Ayyad, Fathy, Hewaidy, and Abdallah (2020).…”

Section: Methodsmentioning

confidence: 99%

“…Cement materials include microsparite, micritic in some parts, and occasionally stained allochems of iron oxides (Figure 6a-c). As reflected by the sedimentological characteristics, with the presence of larger benthic foraminifera and the relative absence of planktic foraminifera, this microfacies type has a shallow inner-shelf depositional environment, following Wilson (1975), Flügel (2010), andHewaidy et al (2019).…”

Section: Sandy Packed Foraminiferal Grain/floatstonementioning

confidence: 99%

“…North‐west of the Gulf of Suez, these rocks are dominated by siliciclastic–carbonate packages, which have formed due to the fluctuations in relative sea‐level, which affect syn‐rift deposition (McNeill, Cunningham, Guertin, & Anselmetti, 2005; Mount, 1984; Richardson & Underhill, 2002; Sallam & Ruban, 2020). In addition, the composition of these rocks reveals the information related to hydrocarbon exploration and enables distinguishing the petroleum system (Hewaidy, Ayyad, Abd El‐Moghny, & Gameel, 2019; McNeill et al, 2005; Moretti et al, 2016; Zecchin, 2007; Zonneveld et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

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Sequence stratigraphy of the Miocene siliciclastic–carbonate sediments in Sadat Area, north‐west of Gulf of Suez: Implications for Miocene eustasy

2022

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The Miocene sequences in the north‐west of the Gulf of Suez represent transition zones between carbonate‐dominated and siliciclastic‐dominated strata. These rocks were greatly influenced by the Gulf of Suez rifting, which resulted in lateral variations of facies and hence presented a complicated stratigraphic setting. Here, we interpret the sequence stratigraphy of the Sadat Area to the north‐west of the Gulf of Suez by integrating biostratigraphic data and microfacies analysis to contribute primarily to the geology of the studied successions and incorporate the existing knowledge of syn‐rift deposition. We determined the ages of the studied formations by biostratigraphic examination of the integrated calcareous nannoplankton, planktic, and benthic foraminifera. Our results distinguish four genetic Miocene sequences. These sequences are defined by four major sequence boundaries that outline sedimentation cycles and were chiefly deposited in a lagoon to outer‐shelf settings. The proposed Miocene eustacy is well‐correlated with global curves, implying a rise in sea level in the lower parts of Zones M4, M5, and M8. In contrast, the reduction of sea‐level rise resulted in the decrease of accommodation space in the upper part of Zone M5. The studied Miocene deposits mainly formed in a shallower marine environment, as shown by a comparison between data from the eastern side of the Gulf of Suez and the data presented in this paper. Furthermore, we demonstrate that the local tectonic activity linked with the Gulf of Suez rifting and the eustatic sea‐level changes were significant factors in the deposition of the Miocene in the studied successions.

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Section: Sandy Algal Bioclastic Packstonementioning

confidence: 57%

Section: Resultsmentioning

confidence: 92%

Section: Methodsmentioning

confidence: 99%

Section: Sandy Packed Foraminiferal Grain/floatstonementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Sequence stratigraphy of the Miocene siliciclastic–carbonate sediments in Sadat Area, north‐west of Gulf of Suez: Implications for Miocene eustasy

2022

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Sequence stratigraphy and reservoir characterization of the lower Eocene rocks (Thebes Formation) along the Tethyan Ocean's southern margin: biostratigraphy and petrophysical parameter applications

Ayyad

El-Moghny

Abuseda

et al. 2023

Int J Earth Sci (Geol Rundsch)

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The Egyptian lower Eocene carbonate rocks (Thebes Formation) are part of an extensive carbonate platform formed during an eustatic regression along the Tethyan Ocean's southern margin. These rocks are essential in developing Egypt's petroleum system because they can operate as vertical seals in specific basins or as source-reservoir rocks. However, few in-depth studies have been conducted to explore the diagenetic history, pore system, petrophysical characteristics, and sequence stratigraphic framework of these rocks and its relationship to the global sequences. Multiple datasets (foraminiferal assemblages, petrographic, and petrophysical data) from the lower Eocene strata exposed in Wadi El-Dakhl and El-Sheikh Fadl sections on the western side of the Gulf of Suez were integrated. The biostratigraphic examination of the planktic foraminifera shows that three Eocene biozones (E5–E7) were identified in the studied successions. The reservoir quality index and the flow zone indicator show that reservoir quality ranges from poor to fair and good. The primary reservoir porosity was resulted from diagenetic processes, including dissolution, fracturing, and meteoric diagenesis, which enhanced reservoir quality. The inferred benthic foraminifera and petrographic studies indicate a shallowing upward trend and deposition in fluctuating settings ranging from upper slope to middle shelf. This progressive reduction in the relative sea level corresponds to a gradual eustatic decline and demonstrates the enhanced control of tectonic activity and eustasy. Consequently, the Thebes Formation was deposited due to Tethyan sea-level changes, and its pore system was influenced by tectonics associated with the Syrian Arc system and Gulf of Suez rifting.

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Sequence stratigraphy and reservoir quality of the Gulf of Suez syn-rift deposits of the Nukhul formation: Implications of rift initiation and the impact of eustacy and tectonic on deposition

Ayyad,

Hewaidy,

Omar

et al. 2023

Marine and Petroleum Geology

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Sequence stratigraphy and biozonation of the Upper Eocene Anqabiya Formation, Gebel Anqabiya, Egypt

Cited by 5 publications

References 43 publications

Sequence stratigraphy of the Miocene siliciclastic–carbonate sediments in Sadat Area, north‐west of Gulf of Suez: Implications for Miocene eustasy

Sequence stratigraphy of the Miocene siliciclastic–carbonate sediments in Sadat Area, north‐west of Gulf of Suez: Implications for Miocene eustasy

Sequence stratigraphy and reservoir characterization of the lower Eocene rocks (Thebes Formation) along the Tethyan Ocean's southern margin: biostratigraphy and petrophysical parameter applications

Sequence stratigraphy and reservoir quality of the Gulf of Suez syn-rift deposits of the Nukhul formation: Implications of rift initiation and the impact of eustacy and tectonic on deposition

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