Neogene–Quaternary paleoenvironments and kerogen assessment of the NDO B-1 well, offshore Nile Delta, Egypt, Eastern Mediterranean: palynological evidence

• Autorzy: Mahmoud Magdy S. , Deaf Amr S. , El Hussieny Mennat-Allah T.

Identyfikatory

DOI

10.24425/agp.2024.151751

• Języki publikacji: EN

Abstrakty

EN

Palynofacies and palynological investigations conducted on the Neogene–Quaternary succession from the NDO B-1 well, located in the offshore Nile Delta, Egypt, in the Eastern Mediterranean, suggest generally shallow marine (neritic) conditions. These environments are manifested by the overall palynofacies composition and the occurrence of dinoflagellate cysts (e.g., Spiniferites spp., Lingulodinium spp., Hystrichokolpoma spp., Homotryblium spp. and Selenopemphix spp.). Neritic environments are suggested for the lower and middle Miocene Sidi Salim, and the Pliocene to Pleistocene upper Kafr El Sheikh, El Wastani and Mit Ghamr formations, while shallower, coastal to inner neritic settings were interpreted for the late Miocene (Qawasim and Rosetta formations) and early Pliocene (Abu Madi and lower Kafr El Sheikh formations). Anoxic conditions existed during the deposition of the studied well succession, which can be seen from the occurrence of imprints of pyrite crystals and some types of oxygen-sensitive dinoflagellate cysts. The palynofacies fluctuated repeatedly between Amorphous Organic Matter (AOM)-dominated and phytoclast-dominated intervals, of kerogen types II and III, respectively. The spore coloration index (SCI) of indigenous thin-walled palynomorphs confirms thermally mature sediments, generative of dry gas and wet gas/condensates. Reworking during the deposition of the upper Sidi Salim, Qawasim and Rosetta formations is inferred from the occurrence of Cretaceous dinoflagellate cysts and pollen.

Słowa kluczowe

EN

palynofacies; palynomorphs; kerogen; offshore; Egypt

PL

palinofacja; palinologia; kerogen; morski; Egipt

• Wydawca: Faculty of Geology of the University of Warsaw ; Komitet Nauk Geologicznych PAN
• Czasopismo: Acta Geologica Polonica
• Rocznik: 2024
• Tom: Vol. 74, no. 3
• Strony: art. no. e21
• Opis fizyczny: Bibliogr. 85 poz., rys., tab., wykr.

Twórcy

autor

Mahmoud Magdy S.

• Department of Geology, Faculty of Science, Assiut University, Assiut 71516, Egypt

autor

Deaf Amr S.

• Department of Geology, Faculty of Science, Assiut University, Assiut 71516, Egypt

autor

El Hussieny Mennat-Allah T.

• Department of Geology, Faculty of Science, Assiut University, Assiut 71516, Egypt

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Uwagi

Opracowanie rekordu ze środków MNiSW, umowa nr POPUL/SP/0154/2024/02 w ramach programu "Społeczna odpowiedzialność nauki II" - moduł: Popularyzacja nauki (2026).