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| Coudurier‐curveur, A.; Karakaş, Ç.; Singh, S.; Tapponnier, P.; Carton, H.; Hananto, N.. |
| The northern Indian Ocean has been widely recognized as an area of broadly distributed deformation within the composite India‐Australia‐Capricorn plate, hosting several diffuse boundary zones and a diffuse triple junction. The occurrence, along reactivated fracture zones, of the exceptionally large (Mw=8.6 and Mw=8.2) 2012 Wharton Basin strike‐slip earthquakes, however, questions whether this composite plate is breaking apart along a discrete boundary. Using recent bathymetric and seismic data, we analyze the most prominent fracture zone (F6a), whose structural trace is particularly well‐expressed. We identify sixty kilometric‐scale pull‐apart basins with geometric properties (length/width ratios) similar to those observed along continental strike‐slip... |
| Tipo: Text |
Palavras-chave: Wharton Basin; Reactivated fracture zones; Nascent plate boundary; Pull-apart basins; Intraplate deformation. |
| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00614/72646/71645.pdf |
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| Feuillet, Nathalie; Beauducel, F.; Jacques, E.; Tapponnier, P.; Delouis, B.; Bazin, S.; Vallee, M.; King, G. C. P.. |
| On November 21, 2004, a magnitude 6.3 earthquake occurred offshore, 10 km south of Les Saintes archipelago in Guadeloupe (French West Indies). There were more than 30000 aftershocks recorded in the following two years, most of them at shallow depth near the islands of the archipelago. The main shock and its main aftershock of February 14, 2005 (M-w = 5.8) ruptured a NE-dipping normal fault (Roseau fault), mapped and identified as active from high-resolution bathymetric data a few years before. This fault belongs to an arc-parallel en echelon fault system that follows the inner edge of the northern part of the Lesser Antilles arc, accommodating the sinistral component of oblique convergence between the North American and Caribbean plates. The distribution... |
| Tipo: Text |
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| Ano: 2011 |
URL: http://archimer.ifremer.fr/doc/00200/31099/29511.pdf |
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