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Cenozoic and Mesozoic basalts from Egypt: a preliminary survey with a view to paleointensity

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Numerous phases of igneous activity took place in Egypt during the Mesozoic and the Cenozoic but no paleointensity results have ever been published from these rocks. Therefore a preliminary survey was conducted in the northern part of Egypt and in Sinai to test the suitability of these basalts for paleointensity determinations. Three Oligo-Miocene sites have been sampled north of Cairo: Abu Zaabal, Qatrani, and 6th of October City. In Sinai, we sampled Jurassic basalts in Wadi Budra and Oligo-Miocene rocks from Wadi Nukhul. The main magnetic carriers of these rocks are titanomagnetites with varying Ti content. Large secondary components are present in most middle Jurassic basalts and discrepancies remain in the directional analysis so this sill cannot be used for paleointensity experiments and the associated poles should not be considered for paleomagnetic reconstructions either. Directional analysis of the Oligo-Miocene basalts is very straightforward and updated mean VGPs have been calculated from the Cairo area (68.9°N, 91.3°E; Kappa = 274; A95 = 3.7) and from Wadi Nukhul (72.7°N, 13.4°E; Kappa = 528; A95 = 5.4). Pseudo-paleointensity results obtained as well from stable Egypt as from Sinai are promising, with values lower or similar (between 29 to 58 μT) to present-day field intensity.


  1. Abdeldayem, A. L., Paleomagnetism of some Cenozoic sediments, Cairo-Fayum area, Egypt, Phys. Earth Planet. Inter., 110, 71–82, 1999.

  2. Abdeldayem, A. L. and D. H. Tarling, Palaeomagnetism of some Tertiary sedimentary rocks, southwest Sinai, Egypt, in the tectonic framework of the S.E. Mediterranean, in Palaeomagnetism and Tectonics of the Mediterranean Region, edited by Morris, A. and Tarling, D. H., Geol. Soceity Special Publ. (London), 105, 333–343, 1996.

  3. Abdel Monem, A. A. and M. A. Heikal, Major element composition, magma type and tectonic environmrnt of Mesozoic to Recent basalt, Egypt: a review, Fac. Earth Sci. Bull., King Abdul Aziz Univ., 4, 121–148, 1981.

  4. Andrew, G., The late Tertiary igneous rocks of Egypt (field relations), Bull. Fac. Sci. Egypt. Cairo Univ., 10, 1–44, 1937.

  5. Ball, J., The Geography and Geology of West Central Sinai, Egypt, Survey Department, Cairo, 1916.

  6. Beadnell, H. J. L., The topography and geology of the Fayum Province of Egypt, Egypt. Survey Dept., Cairo, 101 pp., 1905.

  7. Besse, J. and V. Courtillot, Apparent and true polar wander and the geometry of the geomagnetic field over the last 200 Myr, J. Geophys. Res., 107, doi:10.1029/2000JB000050, 2002.

  8. Beyth, M., Paleozoic vertical movements in Um Bogma area, southwestern Sinai, Bull. Am. Assoc. Petrol. Geol., 65, 160–165, 1981.

  9. Coe, R. S., Paleo-Intensities of the Earth’s Magnetic Field Determined from Tertiary and Quaternary rocks, J. Geophys. Res., 72, 3247–3262, 1967.

  10. Day, R., M. D. Fuller, and V. A. Schmidt, Hysteresis properties of titanomagnetites: Grain size and composition dependence, Phys. Earth Planet. Inter., 13, 260–266, 1977.

  11. Druckman, Y., T. Weissbrod, and A. Horowitz, The Budra formation: a Triassic continental deposit in southwestern Sinai, Report Geol. Surv. Israel, N°OD/3/70, 20 pp., 1970.

  12. El-Hinnawi, E. E., Petrochemical and geochemical studies on Egyptian basalts, Bull. Volcan., 28, 1–12, 1965.

  13. El-Hinnawi, E. and M. Abdel Maksoud, Petrography of Cenozoic volcanic rocks of Egypt, Geol. Rdsch., 57, Stuttgart, 1968.

  14. El-Hinnawi, E. and M. Abdel Maksoud, Geochemistry of Egyptian Ceno-zoic basaltic rocks, Chimie der Erde, 31, 93–112, 1972.

  15. Harrell, J. A. and T. M. Bown, An old Kingdom basalt Quarry at Widdan el-Faras and the Quarry Road to Lake Moeris, J. Amer. Res. Center Egypt, 71–90, 1995.

  16. Heikal, M. A., M. A. Hassan, and Y. A. El-Sheshtawy, Cenozoic basalt of Gabal Qatrani, Western Desert, Egypt, as an example of continental tholeiitic basalt, Ann. Geol. Surv. Egypt, Cairo, Egypt, 13, 193–209, 1983.

  17. Hume, W. F., T. G. Madgwick, F. W. Monn, and H. Sadek, Preliminary geological report of the occurrences of petroleum, in western Sinai, Petrol. Res. Bull. 2, Government Press, Cairo, 1920.

  18. Hussain, A. G., H. Soffel, and A. Schult, Paleomagnetism of the Qatrani basalts, western desert, Egypt, Acad. Sc. Res. Techno., Helwan Observ., 224, 1–9, 1980.

  19. Ibrahim, E., H. Odah, N. El-Agami, and M. Abu El-Enen, Paleomagnetic and geologic investigations on some volcanic rocks, southern Sinai, Egypt, Egyptian J. Geol., 42(1), 79–98, 1998.

  20. Ibrahim, E. H., H. H. Odah, N. L. El Agami, and M. Abu El Enen, Pa-leomagnetic and geological investigation into Southern Sinai volcanic rocks and the rifting of the Gulf of Suez, Tectonophys., 321, 343–358, 2000.

  21. Issawi, B. and U. Jux, Contribution to the stratigraphy of the Paleozoic rocks in Egypt, Geol. Surv. Egypt, paper 64, 28 pp., 1982.

  22. Kirschvink, J., The least squares line and plane and analysis of Paleomag-netic data, Geophys. J. Astr. Soc., 62, 699–718, 1980.

  23. Kora, M., Lower Carboniferous calcareous microfossils from the Gulf of Suez region, Egypt. Geol. Palaeontol., 29, 217–231, 1995.

  24. Kostandi, A. B., Lower Carboniferous calcareous microfossils from the Gulf of Suez region, Egypt. Geol. Palaeontol., 29, 217–231, 1959.

  25. Lofty, H. I., Structural and geotectonic implications induced from paleo-magnetic studies of some Phanerozoic basaltic eruptions, Ph.D. thesis, El-Minia Univ., 1992.

  26. Lofty, H. I., R. Van Der Voo, C. M. Hall, O. A. Kamel, and A. Y. Abdel Aal, Paleomagnetism of early Miocene basaltic eruptions in the areas East and West of Cairo, J. Afric. Earth Sci., 21(3), 407–419, 1995.

  27. McFadden, P. L., R. T. Merrill, M. W. McElhinny, and L. Sunhee, Reversals of the Earth’s magnetic field and temporal variations of the dynamo families, J. Geophys. Res., 96, 3923–3933, 1991.

  28. Meneisy, M. Y. and H. Kreuzer, Potassium-Argon ages of Egyptian basaltic rock, Geol. Jahrb., D9, 21–31, 1974.

  29. Meneisy, M. Y. and A. Y Abdel-Aal, Geochronology of Phanerozoic volcanic activity, Egypt. Bull. Fac. Sci., Ain Shams Univ., Cairo, Egypt, 24, 163–176, 1984.

  30. Mousa, H. E., Geologic studies and genetic correlation of basaltic rocks in West Central Sinai, Ph.D thesis, Fac. Sci., Ain Shams University, 1987.

  31. Perrin, M., Paleointensity determination, magnetic domain structure, and selection criteria, J. Geophys. Res., 103(B12), 30591–30600, 1998.

  32. Poidras, T., P. Camps, and P. Nicol, Controlled atmosphere vibrating thermo-magnetometer (CatVTM): a new device to optimize the absolute paleointensity determinations, Earth Planets Space, 61, this issue, 101–110, 2009.

  33. Said, R., The Geology of Egypt, 377 pp., Elsevier, Amsterdam, 1962.

  34. Said, R., The Geology of Egypt, 734 pp., Balkema, Rotterdam, Brookfield, 1990.

  35. Saleh, A., S. Saleh, and A. Schult, Paleomagnetism and rock magnetism of early Miocene basaltic rocks from West Central Sinai Peninsula, Egypt. J. Appl. Geophys., 3(2), 51–60, 2004.

  36. Steen, G., Radiometric age dating and tectonic significance of some Gulf of Suez igneous rocks, 6th Petrol. Explor. Seminar, EGPC, Cairo, 1982.

  37. Thellier, E. and O. Thellier, Sur L’intensité du champ magnétique terrestre dans le passé historique et géologique, Ann. Geophys., 15, 285–376, 1959.

  38. Wassif, N. A., Data concerning the magnetic, palaeomagnetic and miner-alogical properties of some basalts from Wadi Matulla and Wadi Budra, Sinai, Egypt, Ain Shoms Sci. Bull., 27, 13–35, 1989.

  39. Wassif, N. A., Paleomagnetism and opaque mineral oxides of some basalt from west central Sinai, Geophys. J. Int., 104, 319–330, 1991.

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Correspondence to M. Perrin.

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Key words

  • Paleomagnetism
  • paleointensity
  • Oligo-Miocene
  • Jurassic
  • basalt
  • Egypt