|
OceanDocs >
Africa >
African Marine Science - Oceanography - Fishery >
Miscellaneous >
Veuillez utiliser cette adresse pour citer ce document :
http://hdl.handle.net/1834/740
|
| Titre: | Absolute migration and the evolution of the Rodriguez Triple Junction since 75 Ma |
| Auteur(s): | Masalu, D.C.P. |
| mot-clé ASFA: | Mid-ocean ridges |
| Date de publication: | 2002 |
| Référence bibliographique: | Tanzania Journal of Science , 28 (2), p. 87-93 |
| Résumé: | The Rodriguez Triple Junction (RTJ) is a junction connecting three mid-ocean
ridges in the Indian Ocean: the Southwest Indian Ridge (SWIR), the Central
Indian Ridge (CIR) and the Southeast Indian Ridge (SEIR). The evolution of
the RTJ has been studied extensively for the past 10 Ma and the triple junction
is believed to be largely a ridge-ridge-ridge (RRR) triple junction. However,
due to the scarcity of data its configuration prior to that period is poorly
understood. The migration of the RTJ in the hotspot reference frame, for the
past 75 million years has been mapped, by reconstructing its traces on the
three plates (African, Antarctic and Indian) to their former positions. The
results show that the RTJ has migrated northeasterly at velocities varying
from 10cm/yr at 70 Ma to 2.6cm/yr at 43 Ma and thereafter 3.6–3.8cm/yr, in
a fairly straight-line trajectory, suggesting a stable configuration of the RTJ
since its formation. Because the RRR triple junction is the most stable
configuration that is possible, it is suggested that the configuration of the
RTJ has been largely RRR triple junction since its formation. |
| URI/URL: | http://hdl.handle.net/1834/740 |
| URL d'une autre version: | http://www.ajol.info/viewarticle.php?id=16488&... |
| Collection(s) : | Articles (IMS)
Miscellaneous
|
Fichier(s) constituant ce document :
|
Tous les documents dans DSpace sont protégés par copyright, avec tous droits réservés.
|
