Comparisons Between Seismic Earth Structures and Mantle Flow Models Based on Radial Correlation Functions

Details Comparisons Between Seismic Earth Structures and Mantle Flow Models Based on Radial Correlation Functions Comparisons Between Seismic Earth Structures and Mantle Flow Models Based on Radial Correlation Functions

Sep 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993sci...261.1427j&link_type=abstract

Science, Volume 261, Issue 5127, pp. 1427-1431

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43

Scientific paper

Three-dimensional numerical simulations were conducted of mantle convection in which flow through the transition zone is impeded by either a strong chemical change or an endothermic phase change. The temperature fields obtained from these models display a well-defined minimum in the vertical correlation length at or near the radius where the barrier is imposed, even when the fields were filtered to low angular and radial resolutions. However, evidence for such a feature is lacking in the shear-velocity models derived by seismic tomography. This comparison suggests that any stratification induced by phase or chemical changes across the mid-mantle transition zone has a relatively small effect on the large-scale circulation of mantle material.

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