Physics
Scientific paper
Mar 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986e%26psl..77..187c&link_type=abstract
Earth and Planetary Science Letters (ISSN 0012-821X), vol. 77, no. 2, March 1986, p. 187-202. Research supported by the Institut
Physics
43
Elastic Media, Lithosphere, Ocean Bottom, Pacific Ocean, Islands, Mapping, Plates (Tectonics), Seamounts, Seasat Satellites, Strata, Thickness
Scientific paper
The elastic thickness, Te, of the oceanic lithosphere along the volcanic chains of Cook-Austral and Society islands was determined, using a three-dimensional spatial method to model the lithospheric flexure and assuming a continuous elastic plate. The model was constrained by geoid height data from the Seasat satellite. When the Society and Cook-Austral Te results versus age of load are plotted together, it becomes obvious that within the first five-million years after loading, Te decreases significantly while tending rapidly to an equilibrium value. This may be interpreted as the effect of initial stress relaxation which occurs just after loading inside the lower lithosphere and suggests that the presently measured elastic thickness under the very young Tahiti load (about 0.8 Ma) is not yet the equilibrium thickness.
Calmant Stéphane
Cazenave Anny
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