Calcareous nannofossil, nummulite and ostracod assemblages from Paleocene to Miocene successions in the Bekaa Valley (Lebanon) and its paleogeographic implications

Alqudah, Mohammad; Sanjuan, Josep; Salah, Mohamеd K.; Alhejoj, Ikhlas

doi:10.1016/j.jafrearsci.2018.12.001

Cited by 9 publications

(11 citation statements)

References 20 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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“…1) where it is well-exposed (Walley, 1997). The encountered facies reflect clearly the influence of tectonics on the area during the Paleogene (Walley, 1997;Alqudah et al, 2019). Tectonic events, mainly the collision between Arabia and Eurasia, affect the sedimentation pattern in the region causing a regional uplift, which resulted in the formation of the paleolake of Zahle (Beydoun, 1999;Sharland et al, 2001).…”

Section: Geologic Setting and Stratigraphymentioning

confidence: 94%

“…The lower and middle Eocene rocks in central Lebanon overly the thick chalky Paleocene successions, and are represented mainly by two facies; one is a chalky limestone, often with chert concretions which is common 4 in basin deposits, while the other is a nummulitic limestone which is found on the basin margins. The chalky limestone facies is geographically limited due to the influence of the Syrian Arc event on the region (Alqudah et al, 2019). This rock sequence has a total thickness of 400m in Zahle (Fig.…”

Section: Geologic Setting and Stratigraphymentioning

confidence: 99%

Petrophysical and acoustic assessment of carbonate rocks, Zahle area, central Lebanon

Salah

Alqudah

David

2020

Bull Eng Geol Environ

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Transport and acoustic measurements have been conducted on fifteen rock samples collected from central Lebanon to characterize these rock properties and to assess the impact of lithology, pore types, pore sizes, and textural parameters on the storage capacity and elastic characteristics. The spontaneous imbibition of selected samples was examined by detecting the moving capillary front across a sample. The coefficient of capillarity derived from the spontaneous imbibition is positively correlated with permeability. Seismic velocities in the studied rocks vary widely and are positively correlated with rock density. Matrix-supported rocks with a larger proportion of micropores have lower seismic wave velocities, whereas the grain-supported carbonates exhibit low to moderate porosity, and higher acoustic velocities. The elastic properties of the studied carbonates indicate a granular, rather than a crystalline, texture of the majority of the studied rocks. The widely-variable elastic behavior of basically carbonate rocks implies that seismic reflection profiles in carbonate sequences may contain seismic reflections that do not result from non-carbonate intercalations but which result mainly from variable porosity, pore types, and shapes in the carbonate rocks themselves. This study provides important relationships between the textural, petrophysical, and elastic properties of carbonate rocks which are important for the assessment and understanding of the seismic reflection sections in subsurface carbonate reservoirs.

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“…Porosity and other thin-section derived parameters are characterized in the same way explained in Salah et al (2018). In addition, the nannofossil content has been analyzed as described by Alqudah et al (2019).…”

Section: Petrographymentioning

confidence: 99%

Acoustics and petrophysical investigations on upper cretaceous carbonate rocks from northern Lebanon

Salah

Alqudah

David

2020

Journal of African Earth Sciences

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Calcareous nannofossil, nummulite and ostracod assemblages from Paleocene to Miocene successions in the Bekaa Valley (Lebanon) and its paleogeographic implications

Cited by 9 publications

References 20 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

Petrophysical and acoustic assessment of carbonate rocks, Zahle area, central Lebanon

Acoustics and petrophysical investigations on upper cretaceous carbonate rocks from northern Lebanon

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