Reply to the comment of Talwani et al. (2017) on the Sibuet et al. (2016) paper entitled “Thinned continental crust intruded by volcanics beneath the northern Bay of Bengal”

Type Article
Date 2017-12
Language English
Author(s) Sibuet Jean-Claude1, 2, 3, Klingelhoefer FraukeORCID3, Yeh Yi-Ching4, Rangin Claude5, Lee Chao-Shing1
Affiliation(s) 1 : Natl Taiwan Ocean Univ, Inst Appl Geophys, 2 Pei Ning Rd, Keelung 202, Taiwan.
2 : 44 Rue Cloitre, F-29280 Plouzane, France.
3 : IFREMER, Ctr Brest, BP 70, F-29280 Plouzane, France.
4 : Natl Cent Univ, Dept Earth Sci, Chungli 32001, Taiwan.
5 : UMR 7329 CNRS, Lab GEOAZUR, 250 Rue Albert Einstein, F-06560 Valbonne, France.
Source Marine And Petroleum Geology (0264-8172) (Elsevier Sci Ltd), 2017-12 , Vol. 88 , P. 1126-1129
DOI 10.1016/j.marpetgeo.2017.07.023
WOS© Times Cited 1
Keyword(s) Northern Bay of Bengal, Wide-angle and reflection seismic profiles, Multichannel seismic profiles, Thinned continental crust intruded by, volcanics
Abstract

The northern Bay of Bengal velocity-depth profiles do not follow the velocity-depth curve of the North Atlantic volcanic margins, and only partially the Kerguelen velocity-depth curves. Deep seismic refraction and reflection profiles acquired across the Hatton bank and Feroes ridge show that the melt is intruded into the lower thinned continental crust as sills, which cross-cut the continental fabric rather than underplating as it was often assumed in the past. Compared with the SCS northern margin proxy, we still suggest that the BoB crust is thinned continental crust intruded by post-rifting volcanics, as also shown by the interpretation of the numerous high-quality deep MCS profiles we collected there. What was supposed to be underplating might be sills intruded through the lower thinned continental crust.

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Sibuet Jean-Claude, Klingelhoefer Frauke, Yeh Yi-Ching, Rangin Claude, Lee Chao-Shing (2017). Reply to the comment of Talwani et al. (2017) on the Sibuet et al. (2016) paper entitled “Thinned continental crust intruded by volcanics beneath the northern Bay of Bengal”. Marine And Petroleum Geology, 88, 1126-1129. Publisher's official version : https://doi.org/10.1016/j.marpetgeo.2017.07.023 , Open Access version : https://archimer.ifremer.fr/doc/00393/50459/