Geochemical characteristics of the youngest volcano (Mount Ross) in the Kerguelen archipelago: inferences for magma flux and composition of the Kerguelen plume

• Main Authors: D. Weis, F. A. Frey, A. Giret, J. -m. Cantagrel, Universite Libre, De Bruxelles
• Other Authors: The Pennsylvania State University CiteSeerX Archives
• Format: Text
• Language: English
• Published: 1998
• Subjects: Mount Ross is the youngest; 1–0·1 Ma; volcanic edifice recognized KEY WORDS; geochemistry; isotopes; Kerguelen Islands; magma flux; Kerguelen; Mount Ross
• Online Access: http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.600.3507; http://petrology.oxfordjournals.org/content/39/5/973.full.pdf

in the Kerguelen Archipelago, which is located on the northern part plume magmatism of the submarine Kerguelen Plateau. Lava types range from basaltic trachyandesite to trachyte and extensive glaciation has exposed an intrusive core ranging from gabbro to syenite. Mount Ross rocks are not as silica undersaturated as the basanite to phonolite Upper INTRODUCTIONMiocene lavas erupted in the Southeast Province of the archipelago; The Kerguelen Archipelago on the northern Kerguelenhowever, both lava suites are characterized by relatively high 87Sr/ Plateau (Fig. 1a) has a history from ~40 to 0·1 Ma of86Sr (0·7051–0·7054 and 0·7054–0·7058, respectively) and volcanism that is attributed to the Kerguelen plume (Weislow 206Pb/204Pb (18·02–18·14 and 18·06–18·27, respectively). et al., 1989b). Before forming the Kerguelen ArchipelagoThe abundant trachytes and phonolites in the age range from Lower