Geoid anomalies over the north-east Pacific fracture zones from satellite altimeter data

Auteurs :
CAZENAVE, A.
LAGO, B.
DOMINH, K.

Description :
SEASAT altimeter profiles are used to recover geoid height anomalies. Geoid anomalies observed over fracture zones show a step-like signal of 1-4 m amplitude, downward from the younger, shallower side to the older, deeper side of the fracture zone. Assuming that fracture zones are in isostatic equilibrium at the base of the lithosphere, the geoid offset occurs because the portions of lithosphere on each side of the fracture have different thickness and density structures as predicted by thermal models of lithospheric cooling.


Type de document :
Article de périodique

Source :
Geophysical Journal of the Royal astronomical society Oxford, 1982, n°. 69, p. 15-31

Date :
1982