Inversion of gravity and bathymetry in oceanic regions for long-wavelength variations in upper mantle temperature and composition

作者: Sean C. Solomon , Thomas H. Jordan

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摘要: Long-wavelength variations in geoid height, bathymetry, and SS-S travel times are all relatable to lateral the characteristic temperature bulk composition of upper mantle. The turn mantle convection degree melt extraction from residuum. Thus combined inversion or gravity field, residual seismic velocity information offers promise resolving fundamental aspects pattern dynamics. use differential body wave as a measure information, particular, permits resolution at scales not resolvable by conventional global regional-scale tomography with long-period surface waves. These intermediate scale lengths, well resolved field models, crucial for understanding details any chemical physical layering characteristics so-called 'small-scale' beneath oceanic lithosphere. In 1991 three-year project NASA Geophysics Program was proposed carry out systematic long-wavelength anomalies, bathymetric time delays variation funded award, beginning on 1 Jan. 1992.

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