Heterogeneities in the mantle inferred from seismic and gravity data

Details Heterogeneities in the mantle inferred from seismic and gravity data Heterogeneities in the mantle inferred from seismic and gravity data

Jun 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980pepi...22..244l&link_type=abstract

Physics of the Earth and Planetary Interiors, Volume 22, Issue 3-4, p. 244-254.

Physics

Scientific paper

Analyses of seismic and gravity data are presented for the Indian anomaly of the geopotential. The analysis of gravity is based on the use of the geopotential and of its derivatives. The seismic data are direct determinations of the derivative of the travel-time curve of P-waves obtained from seismograph arrays in the U.S.S.R. The anomalous body consists of a low-density part with a centre at a depth of 750-1000 km and a high-density part at depths of 1100-1800 km. The ratio of anomalous velocity to anomalous density in the lower mantle is positive. There are indications that similar dipolar models are applicable to some other long wavelength anomalies of the geopotential.

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