Cenomanian rocks in the Sinai Peninsula, Northeast Egypt: Facies analysis and sequence stratigraphy

Wanas, H.A.

doi:10.1016/j.jafrearsci.2008.06.004

Cited by 66 publications

(27 citation statements)

References 34 publications

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“…On the other hand, Tucker and Wright (1990) attributed the formation of the fine crystalline dolomite associated with gypsum crystalfilled pores to intensive evaporation of marine water in a supratidal zone during a short period of sea level fall, and a contemporaneous replacement of a previously deposited lime-mudstone. Similar cases were also recorded in the tidal flat limestone of the Illinois Basin (Choquette and Steinen 1980); southwest Andros Island (Gebelein et al 1980); Sinai Peninsula, Egypt (Wanas 2008); and Farafra Depression, Egypt (El-Ayyat 2013). The observed coarse- zoned dolomite rhombs with a faunal restriction (the second type) are probably a late diagenetic product of the previously formed fine dolomite during burial (Tucker and Wright 1990).…”

Section: Discussionsupporting

confidence: 59%

“…Out of them, Khalifa (1981) described finegrained dolomite rhombs in the Lower Eocene and attributed them to contemporaneous dolomitization of limemud in supratidal flats. According to Khalifa (1996), Wanas (2008) and El-Ayyat (2013), the occurrence of fine crystalline dolomite in the platform carbonate indicates peritidal (upper intertidal-supratidal) carbonates that were formed during sea level fall. On the other hand, Tucker and Wright (1990) attributed the formation of the fine crystalline dolomite associated with gypsum crystalfilled pores to intensive evaporation of marine water in a supratidal zone during a short period of sea level fall, and a contemporaneous replacement of a previously deposited lime-mudstone.…”

Section: Discussionmentioning

confidence: 99%

“…Paritidal environment (Khalifa 1996;Wanas 2008) 15 Dolomicrite (Fig. 11e) FA-3 The rock of this microfacies is non-fossiliferous, very hard, dark grey in colour and massive.…”

Section: Minia Fm (Fan Egh)mentioning

confidence: 99%

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Stratigraphy, facies analysis and sequence stratigraphy of the Eocene succession in the Shabrawet area (north Eastern Desert, Egypt): an example for a tectonically influenced inner ramp carbonate platform

2015

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The Eocene rocks in the Shabrawet area (north Eastern Desert, Egypt) have been subdivided into three formations that are from base to top: the Minia Formation (Late Ypresian), the Sannor Formation (Bartonian) and the Maadi Formation (Priabonian). These three formations are disconformable with each other. In addition, the whole Eocene succession is disconformably overlain by the Oligocene rocks and is underlain by the Cretaceous rocks with an angular unconformity surface. The Sannor Formation has been subdivided into three informal units: lower, middle and upper units. The overall sedimentary nature of the Eocene rocks in the study area is dominated by carbonate-siliciclastic rocks. Detailed microfacies analysis has enabled discrimination of 22 sedimentary microfacies types, which are grouped into six facies associations, equivalent to six depositional environments sited on an inner ramp setting. These depositional environments are floodplain-dominated fluvial, lacustrine/palustrine, tidal flat, restricted inner lagoon, shoal bar and outer lagoon with open circulation. A suitable depositional model of the Eocene rocks is given. In addition, four discrete benthonic foraminiferal biozones were reported in the Eocene succession, arranged from base to top: (1) Alveolina frumentiformis biozone (Late Ypresian), (2) Orthoplecta clavata biozone (Bartonian), (3) Dictyoconus aegyptiensis biozone (Bartonian) and (4)Discorbis vesicularis biozone (Priabonian). In terms of sequence stratigraphy, the studied Eocene succession exhibits three superimposed depositional sequences, each of which shows retrogradational (transgressive systems tract) and aggradational (highstand systems tract) to progradational (lowstand systems tract) packages of facies. The retrogradational package displays a predominance of outer lagoon and restricted inner lagoon facies. The aggradational package shows an increase of shoal bar and tidal flat facies, whereas the progradational package marks the occurrence of continental facies (floodplaindominated fluvial and lacustrine deposits). In this study, it is noticed that there are lateral and vertical changes in the depositional environments of the Eocene rocks, between shallow marine and continental environments. Also, many unconformities have been recorded in between and within these rock units. Such remarks indicate that the Eocene rocks were deposited within a highly tectonically active area that was consequently influenced by the transgression and regression of the Neo-Tethys. Such tectonic activity could be related to the Syrian Arc System that was renewed and enlarged several times during the Late Cretaceous up to the Neogene in the eastern and southeastern Mediterranean domain.

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Section: Discussionsupporting

confidence: 59%

Section: Discussionmentioning

confidence: 99%

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Stratigraphy, facies analysis and sequence stratigraphy of the Eocene succession in the Shabrawet area (north Eastern Desert, Egypt): an example for a tectonically influenced inner ramp carbonate platform

2015

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“…In southern Negev and Eastern Sinai, it is equivalent to Gerofit Formation [48]. In Sinai and North Eastern Desert, it is recorded in many parts and in the subsurface having the same nomenclature ( [22]; [1]; [30]; [38]; [45]; [52]). …”

Section: The Wata Formation (Middle To Upper Turonian)mentioning

confidence: 99%

Depositional Trends and Sedimentary Environments of the Cenomanian-Turonian Sediments along G. Nezzazat-G. Ekma, South-West Sinai, Egypt

Fawal¹,

Hassan²,

Shehata³

2014

IOSRJAGG

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“…Each sequence consists of a package of transgressive and regressive sedimentary facies (systems tracts or facies tracts) and is bracketed by two sequence boundaries (Wanas, 2008). In marine shelf homogeneous carbonate environments, it is sometimes difficult to distinguish between the different system tracts of a depositional sequence (Posamentier and Vail, 1988;Sarg, 1988).…”

Section: Sequence Stratigraphymentioning

confidence: 99%

Facies analysis and sequence stratigraphy of the Asmari Formation in the northern area of Dezful Embayment, south-west Iran

Zoeram¹,

Vahidinia²,

Mahboubi³

et al. 2013

Studia UBB Geologia

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Abstract. This paper deals with the sequence stratigraphy of the Oligocene (Rupelian-Chattian)-Early Miocene (Burdigalian) Asmari Formation based on microfacies analysis of the sediments in the Ghale Nar Oilfield, central area of Zagros fold-thrust belt. Fourteen facies types typical for upward shallowing trend from open marine (MF 1-3), to shoal (MF 4-5), semi-restricted and restricted lagoon , and finally to near-shore lagoon (MF 13-14) depositional environments were identified. Based on the environmental interpretations, we reconstructed a homoclinal ramp mainly represented by its inner and middle sectors. Facies types MF 4-14 are characterized by the occurrence of large and small porcelaneous benthic foraminifera representing a shallow-water setting of an inner ramp influenced by wave-and tide-related processes. MF1 (Pabdeh Formation), and 2-3 with planktonic, large and small hyaline benthic foraminifera represent between fair weather wave base (FWWB) and storm wave base (SWB). Four third-order depositional sequences were recognized. In order to better correlate the identified sequences with those pre-defined of the Asmari Formation in the Dezful Embayment and the Izeh zone that are chronologically well-known, we use their number instead of their name. Sequence 2 mainly consists of an open marine environment in the base, followed by semi-restricted to restricted lagoonal facies. Sequences 36 are characterized by semi-restricted to restricted lagoonal facies. Moreover, the regional relative sea-level change curves correlate well with the global sea-level change curves.

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Cenomanian rocks in the Sinai Peninsula, Northeast Egypt: Facies analysis and sequence stratigraphy

Cited by 66 publications

References 34 publications

Stratigraphy, facies analysis and sequence stratigraphy of the Eocene succession in the Shabrawet area (north Eastern Desert, Egypt): an example for a tectonically influenced inner ramp carbonate platform

Stratigraphy, facies analysis and sequence stratigraphy of the Eocene succession in the Shabrawet area (north Eastern Desert, Egypt): an example for a tectonically influenced inner ramp carbonate platform

Depositional Trends and Sedimentary Environments of the Cenomanian-Turonian Sediments along G. Nezzazat-G. Ekma, South-West Sinai, Egypt

Facies analysis and sequence stratigraphy of the Asmari Formation in the northern area of Dezful Embayment, south-west Iran

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