%0 Journal Article
%9 ACL : Articles dans des revues avec comité de lecture non répertoriées par l'AERES
%A Operto, S.
%A Charvis, Philippe
%T Kerguelen plateau : a volcanic passive margin fragment ?
%D 1995
%L fdi:42472
%G ENG
%J Geology
%@ 0091-7613
%K TECTONIQUE DE PLAQUES ; GEOLOGIE STRUCTURALE ; CROUTE CONTINENTALE ; SISMOLOGIE ; VOLCANISME
%K OCEAN INDIEN
%K KERGUELEN PLATEAU
%N 6
%P 137-140
%R 10.1130/0091-7613(1995)023<0137:KPAVPM>2.3.CO;2
%U https://www.documentation.ird.fr/hor/fdi:42472
%> https://horizon.documentation.ird.fr/exl-doc/pleins_textes/pleins_textes_6/b_fdi_35-36/42472.pdf
%V 23
%W Horizon (IRD)
%X The 21-25-km-thick crust of the southern Kerguelen Plateau consists of three units: (1) a ≤ 2.3-km-thick sedimentary cover; (2) a 3-6-km-thick basaltic layer with velocities ranging from 4.5 to 6.2 km/s; and (3) a 15-17-km-thick lower crust with velocities from 6.6 to 6.9 km/s, including a 3-6-km-thick transition zone located at the base of the crust. The low-velocity transition zone has an average velocity of 6.7 km/s and exhibits several internal wide-angle reflections. The velocity-depth structure of the crust differs significantly from that of other hotspot-related oceanic plateaus and suggests that the southern Kerguelen Plateau may be a fragment of a volcanic passive margin composed of a thinned continental crust overlain by basalt flows.
%$ 064TECTO