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| Hananto, Nugroho; Boudarine, Asmoune; Carton, Helene; Singh, Satish C.; Avianto, Praditya; Dyment, Jerome; Qin, Yanfang; Ghosal, Dibakar; Zuraida, Rina; Tapponnier, Paul E.; Deplus, Christine; Sieh, Kerry. |
| The Wharton Basin in the Indian Ocean is one of the most extensively deforming ocean basins, as confirmed by the occurrence of several very large earthquakes starting from January 12, 2012 with Mw 7.2 followed by the great earthquakes of April 11, 2012 with Mw 8.6 and Mw 8.2. Although the Mw 7.2 and Mw 8.2 earthquakes seem to have ruptured the re-activated N–S striking fracture zones, the largest event (Mw 8.6) required the rupturing of several faults, oblique to each other, in a very complex manner. In order to understand the nature of deformation in these earthquakes rupture zones, we recently acquired 90 000 km2 of bathymetry, 11 400 km of sub-bottom profiling, gravity and magnetic data covering the rupture areas of the 2012 earthquakes east of the... |
| Tipo: Text |
Palavras-chave: The 2012 Indian Ocean earthquake; Diffuse deformation; Wharton Basin; Plate bending; Shear zones; Normal faults. |
| Ano: 2018 |
URL: https://archimer.ifremer.fr/doc/00456/56738/58526.pdf |
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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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