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Abstract The target of this study is to evaluate the foraminiferal faunas and nannoplankton floras in an effort to refine existing biostratigraphic divisions in the northern part of Gulf of Suez area , the study concentrates mainly on on the Stratigraphic, Paleontologic investigations on two wells and one surface section. Planktonic foraminiferal and calcareous nannoplankton zones, were correlated with each other and shows good similarity in comparison with the Geologic time scale 2004. Lithostratigraphy, the late Paleocene through Middle Eocene in the studied area is divisible into three rock units from base to top, Esna, Thebes, and Darat formations, that unconformably overlies Sudr Formatin (Maastrichtian age), which confirmed by CC25 nannoplankton Zone and Globotruncana spp. foraminiferal zonal marker. Thebes / Darat Formation contact, falls in the lower part of Zone NP15 & around the Hankenina nuttalli / Globigerinatheka subconglobata zonal boundary, coincides with Strugo & Faris (2003). Esna Formation, Which was deposited during the late Paleocene and early Eocene is represented in both wells and only the most top part of Esna Formation is represented in Abu Zenima surface section where the section is terminated. The Thebes Formation. Conformably overlies the Esna Formation, was deposited during the Early Eocene and the lower part of middle Eocene, and representative in the three sections. Darat Formation, Conformably overlies the Thebes Formation, and unconformably underlies the Nukhul Formation and was deposited during middle Eocene, and take place in our investigated area. Paleontology, Planktonic foraminiferal and calcareous nannoplankton analysiss of the south Abu zenima section in the west central Sinai and GS 114-1A & GS 197-1 wells in the northern part of Gulf of Suez area have been completed Summary and conclusion and indicate ages from the Late Paleocene to Middle Eocene in both wells , from Early to Middle Eocene in the surface section, illustrated in 3 range charts for each discipline. Calcareous nannoplankton has been organized and classified into 21 plates according to the zonal markers and the assembalage of each zone, to facilitate the zones definition. Biostratigraphy, eleven planktonic foraminiferal biozones and nine nannoplankton biozones are recognized from late Paleocene to middle Eocene, the calcareous nannoplankton investigation are carried out to confirm the results obtained from the planktonic foraminifera at the Paleocene/Eocene boundary and through the Early-middle Eocene section as will as Early/Middle Eocene boundary. The main result of this investigation is the record of an almost complete section in south Abu Zenima outcrop, from Early to middle Eocene in the west central part of Sinai at the eastern coast of Gulf of Suez area. Rhabdolithus inflata nannoplankton marker is recorded as an initial record in Egypt, hence we divide NP14 to NP14a & NP14b subzones, accordingly we approximate the Early/Middle Eocene boundary passes through NP14a, which is closely matched with Acranina pentacamerata (P9) Zone and compatable with, Geologic time scale of Gradstein et al. (2004). The stratigraphic positions of many calcareous nannoplankton substitute markers were discussed with other authors as mentioned before in the part of stratigraphic remarks, at which point, some alternative markers fit and others does not fit. the harmony has been noticed, as a result of the comparison between Planktonic foraminiferal & calcareous nannofossils biostratigraphic zones with the Geologic time scale, Gradstein et al.(2004), table ( 2 ), which is considered the most recent global time scale all over the world. |