Tectonic fabric and lithospheric strength of northern Eurasia based on gravity data

Details Tectonic fabric and lithospheric strength of northern Eurasia based on gravity data Tectonic fabric and lithospheric strength of northern Eurasia based on gravity data

Dec 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994georl..21.2653k&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 21, no. 24, p. 2653-2656

Mathematics

Logic

7

Gravimetry, Gravity Anomalies, Lithosphere, Plates (Tectonics), Tectonics, U.S.S.R., Maps, Rheology, Thickness, Topography

Scientific paper

The isostatic gravity anomalies over the whole former USSR (FSU) from land gravimetry are presented here for the first time at a spatial resolution adequate to study the tectonic fabric and the lithospheric rigidity. The short wavelength gravity anomalies improve the delineation of the regional tectonic units of the FSU, originally identified from the geological and aeromagnetic data. A study of the coherence between the Bouguer gravity anomaly and topography of East European and Siberian Cratons allowed us to estimate the elastic plate thickness T(sub e) of 78 to 109 km. Relying on the current knowledge of the thermal state of Archean lithosphere, we inferred from T(sub e) the thermal plate thickness T(sub p) of 200-250 km.

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