Palaeomagnetism of the basalts of Wadi Abu Tereifiya, Mandisha and dioritic dykes of Wadi Abu Shihat, Egypt |
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Authors: | A. Gouda Hussain A. Schult H. Soffel |
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Affiliation: | Helwan Institute of Astronomy and Geophysics, Helwan, Cairo, Egypt;Institute für Allgemeine und Angewandte Geophysik der Universität München, Theresienstr 41, 8 München 2, Germany |
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Abstract: | Summary. One hundred and fifty oriented samples were collected from 12 sites from the Tertiary basalts of Wadi Abu Tereifiya (30.0°N, 32.1° E). After alternating field demagnetization the mean direction of the natural remanent magnetization is, D = 187.9°, I = -20.8° with α95= 5.8°. This yields a palaeopole at 69.4°N, 188.3° E. Also, 30 oriented samples were collected from two sites from Mandisha in Bahariya Oasis (28.4°N, 28.9° E). After cleaning, the mean direction of the NRM is D = 191.0°, I = 5.2° with α95= 9.9°. This yields a palaeopole position at 58.2°N, 186.7° E. Besides, the NRM of 70 oriented samples collected from seven dioritic dykes from Wadi Abu Shihat (26.3°N, 33.2° E) was found to have a mean direction, D = 142.0°, I = -0.3°, which leads to a palaeopole position at, 44.9°N, 273.0° E. This agrees with other Mesozoic pole positions from Africa. |
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