|
ИСТИНА |
Войти в систему Регистрация |
ИСТИНА ЦЭМИ РАН |
||
Arabia‐Somalia plate kinematics, evolution of the Aden‐Owen‐Carlsberg triple junction, and opening of the Gulf of Adenстатья
Статья опубликована в высокорейтинговом журнале
Статья опубликована в журнале из списка Web of Science и/или Scopus- Авторы: Fournier Marc, Chamot‐Rooke Nicolas, Petit Carole, Huchon Philippe, Al‐Kathiri Ali, Audin Laurence, Beslier Marie‐Odile, d'Acremont Elia, Fabbri Olivier, Fleury Jean‐Marc, Khanbari Khaled, Lepvrier Claude, Leroy Sylvie, Maillot Bertrand, Merkouriev Serge
- Журнал: Journal of Geophysical Research
- Том: 115
- Номер: B4
- Год издания: 2010
- Издательство: William Byrd Press for John Hopkins Press
- Местоположение издательства: United States
- DOI: 10.1029/2008jb006257
- Аннотация: New geophysical data collected at the Aden‐Owen‐Carlsberg (AOC) triple junctionbetween the Arabia, India, and Somalia plates are combined with all available magneticdata across the Gulf of Aden to determine the detailed Arabia‐Somalia plate kinematicsover the past 20 Myr. We reconstruct the history of opening of the Gulf of Aden,including the penetration of the Sheba Ridge into the African continent and the evolutionof the triple junction since its formation. Magnetic data evidence three stages of ridgepropagation from east to west. Seafloor spreading initiated ∼20 Myr ago along a 200 km‐long ridge portion located immediately west of the Owen fracture zone. A second 500 km‐long ridge portion developed westward up to the Alula‐Fartak transform fault beforeChron 5D (17.5 Ma). Before Chron 5C (16.0 Ma), a third 700 km‐long ridge portion wasemplaced between the Alula‐Fartak transform fault and the western end of the Gulf ofAden (45°E). Between 20 and 16 Ma, the Sheba Ridge propagated over a distance of1400 km at an extremely fast average rate of 35 cm yr−1. The ridge propagation resultedfrom the Arabia‐Somalia rigid plate rotation about a stationary pole. Since Chron 5C(16.0 Ma), the spreading rate of the Sheba Ridge decreased first rapidly until 10 Ma andthen more slowly. The evolution of the AOC triple junction is marked by a change ofconfiguration around 10 Ma, with the formation of a new Arabia‐India plate boundary.Part of the Arabian plate was then transferred to the Indian plate.
- Добавил в систему: Меркурьев Сергей Александрович