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| Patriat, Martin; Klingelhoefer, Frauke; Aslanian, Daniel; Contrucci, Isabelle; Gutscher, Marc-andré; Talandier, Jacques; Avedik, Felix; Francheteau, Jean; Weigel, Wilfried. |
| [1] In French Polynesia, the young (< 5Ma) Society Islands appear to result from intraplate volcanism, while the old (>50 Ma) Tuamotu plateau was likely created at or near the ridge axis. The structure of the crust between those two archipelagoes is constrained by a 300 km long refraction seismic profile. Crustal and upper mantle arrivals recorded by 6 OBHs and 3 land stations were used to provide a 2D model of the crust. Results of our study, combined with that of Grevemeyer et al. [2001] show a slight flexure below the Tahiti apron, while a deep crustal root (21 km) underlies the Tuamotu plateau. These structures reflect the different modes of load emplacement and compensation mechanisms between these two volcanic edifices, consistent with an... |
| Tipo: Text |
Palavras-chave: Volcanic Islands; Flexure; Hotspot; Refraction methods; French Polynesia. |
| Ano: 2002 |
URL: http://archimer.ifremer.fr/doc/2002/publication-621.pdf |
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| Gutscher, Marc-andré. |
| The aim of the CIRCEE-HR cruise proposal is to conduct a neo-tectonic study of the Calabrian subduction zone offshore Southern Italy, a region struck repeatedly by the most destructive earthquakes in European history. This oceanographic expedition will study the sources of the 1693 Catania earthquake (60,000 killed) and the 1908 Messina earthquake, which produced intensity X-XI shaking and tsunamis. The 1908 (normal faulting mechanism) earthquake triggered a turbidite flow, which ruptured submarine cables. The source of some strong historical earthquakes (1169, 1542, 1693) remains unknown. Several crustal scale structures have been proposed as being seismogenic: the Malta escarpment, a lithospheric tear fault (STEP), the subduction fault plane and other... |
| Tipo: Text |
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| Ano: 2013 |
URL: http://archimer.ifremer.fr/doc/00385/49653/50165.pdf |
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