| 000 | 03315cam a2200337 a 4500 | ||
|---|---|---|---|
| 003 | EG-GiCUC | ||
| 005 | 20250223032801.0 | ||
| 008 | 210809s2021 ua a f m 000 0 eng d | ||
| 040 |
_aEG-GiCUC _beng _cEG-GiCUC |
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| 041 | 0 | _aeng | |
| 049 | _aDeposite | ||
| 097 | _aM.Sc | ||
| 099 | _aCai01.12.15.M.Sc.2021.He.S | ||
| 100 | 0 | _aHesham Mokhtar Gaber Elsayed | |
| 245 | 1 | 4 |
_aThe syn-eruptive/inter-eruptive sequences of the Dokhan volcanics-Hammamat sediments, Wadi Dara, North Eastern Desert, Egypt / _cHesham Mokhtar Gaber Elsayed ; Supervised Ezz Eldin Abdelhakim Khalaf , Mounir Hosni Elazabi |
| 246 | 1 | 5 | _aالتسلسلات المتزامنة ومابعد ثوران البراكين لصخور براكين الدخان ورواسب الحمامات وادي دارا : شمال الصحراء الشرقية : مصر |
| 260 |
_aCairo : _bHesham Mokhtar Gaber Elsayed , _c2021 |
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| 300 |
_a154 P. : _bill. ; _c25cm |
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| 502 | _aThesis (M.Sc.) - Cairo University - Faculty of Science - Department of Geology | ||
| 520 | _a The Dara area in the Northeastern Desert is an example of the Ediacaran volcano-sedimentary deposits.The latter is characterized by their diverse lithofacies and proportions within the study area. They can be classified into inter- and syn-eruptive facies that were generated by diverse depositional processes including debris flows, sheet floods, lacustrine flood flows, lava flows, pyroclastic ash falls/density currents and dike swarms. Three main sequences are recorded along the Dara up-streams area; lower, middle and upper which are represented by the latter facies. These facies correspond to alluvial fan, aeolian-fluvial, lacustrine, lava flow and pyroclastic facies associations. They reveal variations in accommodation to sediment supply (A/S) ratio.The ratios of A/S range from (>+1) through (0) to (0 to +1) for lower, middle, and upper sequences, respectively, demonstrating a significant change in depositional context. The diversity of the facies along the three sequences can be subdivided into Low-Accommodation Systems Tracts (LAST) with negative A/S (A/S ratio close to zero) and High- Accommodation Systems Tracts (HAST) with fluctuation in A/S ratio between zero and +1. The lower and upper sequences are characterized by the presence of clast-supported conglomerates and pyroclastics with fluvial sand bodies and debris flow deposits, overlain or underlain by lacustrine deposits, respectively denoting a fluctuations between a LAST (positive A/S ratio close to zero) and a HAST(A/S ratio > 1).The middle sequence is marked by lava flows facies at the base, passing to pyroclastic deposits, defining a LAST (A/S close to zero). The upper sequence sediments show sediment recycling and moderate weathering (high CIA and PIA) of the protolith near uplifted basin flank(s) under dominant semi-arid to arid conditions, if compared with those exposed at lower sequence | ||
| 530 | _aIssued also as CD | ||
| 653 | 4 | _aDara basin | |
| 653 | 4 | _aEdiacaran | |
| 653 | 4 | _aVolcano-sedimentary successions | |
| 700 | 0 |
_aEzz Eldin Abdelhakim Khalaf , _eSupervisor |
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| 700 | 0 |
_aMounir Hosni Elazabi , _eSupervisor |
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| 856 | _uhttp://172.23.153.220/th.pdf | ||
| 905 |
_aNazla _eRevisor |
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| 905 |
_aShimaa _eCataloger |
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| 942 |
_2ddc _cTH |
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| 999 |
_c81668 _d81668 |
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