Extraction of a lithospheric cooling signal from oceanwide geoid data

Details Extraction of a lithospheric cooling signal from oceanwide geoid data Extraction of a lithospheric cooling signal from oceanwide geoid data

Dec 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999e%26psl.174..173d&link_type=abstract

Earth and Planetary Science Letters, Volume 174, Issue 1-2, p. 173-181.

Computer Science

9

Scientific paper

The geoid, an equipotential surface of Earth's gravity field, reflects the distribution of mass within the planet and hence a variety of geodynamic processes. Because these data are dominated by sublithospheric processes, notably mantle convection, they have not played a major role in the ongoing debate concerning models of the thermal evolution of oceanic lithosphere. Application of spatial filtering to the age derivative of the geoid, however, extracts an age-dependent signal which reflects lithospheric thermal evolution. The data are much better fit by a thin (about 100 km thick) thermal plate than by a cooling halfspace, and so provide a valuable constraint complementary to and consistent with the variations in oceanic depth and heat flow with age.

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