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Geology; September 2000; v. 28; no. 9; p. 779-782; DOI: 10.1130/0091-7613(2000)28<779:MGEFAL>2.0.CO;2
© 2000 Geological Society of America
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Marine geologic evidence for a Levantine-Sinai plate, a new piece of the Mediterranean puzzle

Jean Mascle1, Jean Benkhelil2, Gilbert Bellaiche1, Tiphaine Zitter3, John Woodside3, Lies Loncke1 and Prismed II Scientific Party

1 Géosciences-Azur, Observatoire Océanologique de Villefranche, BP 48, 06235 Villefranche sur Mer, France
2 Cefrem, Université de Perpignan, Avenue de Villeneuve, 66000 Perpignan, France
3 Free University, Amsterdam, Netherlands
4 No affiliation available

Marine geophysical data recorded offshore Egypt illustrate the presence of an active fault belt, trending N145°E, that obliquely transects the eastern Nile deep-sea fan. This belt, more than 150 km long, consists of a series of linear transtensive faults, with an apparent right-lateral horizontal component. These fault zones bound thick-sediment-filled grabens where linear salt ridges and diapirs represent likely Messinian salt reactive response to regional transcurrent geodynamics. We infer that this tectonic belt might correspond to an offshore extension of the Gulf of Suez rift system. If our hypothesis is correct, this fault belt might represent the western boundary of a Levantine-Sinai microplate, locked between the major Arabia and Africa plates and the Anatolian-Aegean microplate.

Key Words: plate tectonic • Mediterranean Sea • Nile • deep-sea fan




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