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| Bellahsen, N; Fournier, M; D'Acremont, E; Leroy, S; Daniel, Jm. |
| [1] The Gulf of Aden and the Sheba spreading ridge ( Gulf of Aden) forms the southern boundary of the Arabian Plate. Its orientation ( 075 degrees E) and its kinematics ( about 030 degrees E divergence) are interpreted as the result of an oblique rifting. In this contribution, a field study in the northeastern Gulf of Aden allows us to confirm the Oligo-Miocene synrift directions of extension and to precise the normal fault network geometry. The synrift extensions are 020 degrees E and 160 degrees E ( possibly in this chronological order); the normal faults strike 070 degrees E, 090 degrees E, and 110 degrees E. The results show that some characteristics are consistent with oblique rifting analogue models, while some others are not. Especially, fault... |
| Tipo: Text |
Palavras-chave: Oblique rift; Extension; Stress rotation; Normal fault; Arabia. |
| Ano: 2006 |
URL: https://archimer.ifremer.fr/doc/00235/34588/33068.pdf |
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| D'Acremont, E; Leroy, S; Beslier, Mo; Bellahsen, N; Fournier, M; Robin, C; Maia, M; Gente, P. |
| The Gulf of Aden is a young and narrow oceanic basin formed in Oligo-Miocene time between the rifted margins of the Arabian and Somalian plates. Its mean orientation, N75 degrees E, strikes obliquely (50 degrees) to the N25 degrees E opening direction. The western conjugate margins are masked by Oligo-Miocene lavas from the Afar Plume. This paper concerns the eastern margins, where the 19-35 Ma breakup structures are well exposed onshore and within the sediment-starved marine shelf. Those passive margins, about 200 km distant, are non-volcanic. Offshore, during the Encens-Sheba cruise we gathered swath bathymetry, single-channel seismic reflection, gravity and magnetism data, in order to compare the structure of the two conjugate margins and to reconstruct... |
| Tipo: Text |
Palavras-chave: Continental margins; Gulf of Aden; Ocean-continent transition; Plate divergence; Rifted margin; Seafloor spreading. |
| Ano: 2005 |
URL: https://archimer.ifremer.fr/doc/00230/34079/32539.pdf |
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