Deep crustal structure of the Tuamotu plateau and Tahiti (French Polynesia) based on seismic refraction data - art. no. 1656

Type Article
Date 2002-07
Language English
Author(s) Patriat MartinORCID, Klingelhoefer FraukeORCID, Aslanian DanielORCID, Contrucci Isabelle, Gutscher Marc-André, Talandier Jacques, Avedik Felix, Francheteau Jean, Weigel Wilfried
Affiliation(s) IFREMER, DRO GM, Plouzane, France.
UBO, Geosci Marines, Plouzane, France.
CEA, LDG, Bruyeres Le Chatel, France.
Univ Hamburg, Inst Geophys, Hamburg, Germany.
Source Geophysical Research Letters (0094-8276) (American Geophysical Union), 2002-07 , Vol. 29 , N. 14 , P. NIL_388-NIL_391
DOI 10.1029/2001GL013913
WOS© Times Cited 13
Keyword(s) Volcanic Islands, Flexure, Hotspot, Refraction methods, French Polynesia
Abstract [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 increasing elastic thickness of the oceanic lithosphere with age.
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Patriat Martin, Klingelhoefer Frauke, Aslanian Daniel, Contrucci Isabelle, Gutscher Marc-André, Talandier Jacques, Avedik Felix, Francheteau Jean, Weigel Wilfried (2002). Deep crustal structure of the Tuamotu plateau and Tahiti (French Polynesia) based on seismic refraction data - art. no. 1656. Geophysical Research Letters, 29(14), NIL_388-NIL_391. Publisher's official version : https://doi.org/10.1029/2001GL013913 , Open Access version : https://archimer.ifremer.fr/doc/00000/621/