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Reply to comment on the article “Propagation of a lithospheric tear fault (STEP) through the western boundary of the Calabrian accretionary wedge offshore eastern Sicily (Southern Italy)” by Gallais et al., 2013 Tectonophysics ArchiMer
Gallais, Flora; Graindorge, David; Gutscher, Marc-andre.
In his Comment, A. Argnani argues that our interpretation of the STEP fault (named STEP-1 fault, in the Comment) is poorly constrained by the seismic data used in Gallais et al. (2013), and he particularly disagrees with our identification north of the Alfeo Seamount. A. Argnani is convinced that the tear fault is expressed by a belt of surface deformation, close to the Malta Escarpment. However, none of the seismic images published by A. Argnani show a crustal scale structure that could be associated with the presence at depth of a lithospheric tear. In that paper we documented the presence of a sub-vertical crustal scale fault, located 50 km east of the Malta Escarpment, with a northward increasing vertical offset (Gallais et al., 2013). The track of...
Tipo: Text Palavras-chave: Subduction zones; Lithospheric fault; Slab roll-back; Active deformation; Multichannel seismic profiles; Slab tear.
Ano: 2014 URL: http://archimer.ifremer.fr/doc/00160/27133/25331.pdf
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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” ArchiMer
Sibuet, Jean-claude; Klingelhoefer, Frauke; Yeh, Yi-ching; Rangin, Claude; Lee, Chao-shing.
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...
Tipo: Text Palavras-chave: Northern Bay of Bengal; Wide-angle and reflection seismic profiles; Multichannel seismic profiles; Thinned continental crust intruded by; Volcanics.
Ano: 2017 URL: http://archimer.ifremer.fr/doc/00393/50459/51192.pdf
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