Physics
Scientific paper
Oct 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987e%26psl..85..427d&link_type=abstract
Earth and Planetary Science Letters (ISSN 0012-821X), vol. 85, no. 4, Oct. 1987, p. 427-438.
Physics
11
Earth Mantle, Geodynamics, Lithology, Pacific Islands, Seasat Satellites, Bathymeters, Fissures (Geology), Volcanoes
Scientific paper
Filtered Seasat data for an area covering the Cook-Austral archipelagoes reveal the existence of two directions with azimuths of N 150 deg and N 95 deg. The first corresponds to a long linear topographic bump, and is suggested to confirm the existence of an ancient hot spot with a trace copolar to the Emperor chain. This result may explain both an important thermal rejuvenation noted in that area, and the very disturbed ages and morphologies of volcanic structures recorded in the Austral archipelago. The second direction is underlined by geoid signatures of fracture zone type which are interpreted as a possible consequence of recent intraplate deformation.
Baudry Nicolas
Diament Michel
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