EARTH MODELS WITH CHEMICALLY HOMOGENEOUS CORES |
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| Authors: | B A Bolt |
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| Institution: | Department of Appfied Mathematics, University of Sydney, Australia |
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| Abstract: | Summary. The range of possible density distributions in the mantle of the Earth has been examined assuming a chemically homogeneous core. A discussion of various Earth models with homogeneous cores shows that the range is relatively small in the upper part of the mantle. For a density near the surface between 2.8 and 4.0 g/cm3, the density at 1000 km is between 4.1 and 4.8 g/cm3, and at 2000 km is between 5.2 and 6.5 g/cm3.
Graphs showing the distributions of density, gravity, pressure, and elastic parameters in two fairly extreme models are given. The first model has a density jump at the core boundary of 4.2 g/cm3 and only slight heterogeneity in D. The second has a continuous density distribution throughout the Earth and large heterogeneity in D. |
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