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| 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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| Labanieh, Shasa; Chauvel, Catherine; Germa, Aurelie; Quidelleur, Xavier. |
| In subduction zones, melting and dehydration of the subducted slab introduce material into the mantle wedge and modify its chemical and isotopic composition. As a consequence, island arc lavas differ significantly from mid-ocean ridge basalts and ocean island basalts. In some arcs, the composition of lavas is strongly influenced by the sedimentary material introduced with the slab; in others, magma composition is mainly affected by aqueous fluids released by the slab. The Lesser Antilles arc is known for its extreme continental-crust-like signature but for some Lesser Antilles lavas subducted sediments are barely involved and enrichment in fluid-mobile elements (Ba, U, Sr, Pb, etc.) is the dominant feature. Here we evaluate whether La/Sm is a quantitative... |
| Tipo: Text |
Palavras-chave: Lesser Antilles; Slab dehydration; Sediment melting; Island arcs; Subduction zones. |
| Ano: 2012 |
URL: http://archimer.ifremer.fr/doc/00113/22392/20234.pdf |
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