Structure of the Siberian upper mantle from superlong seismic profile data

Abstract

The paper discusses the mantle structure along superlong seismic profiles in Russia examined using the method of homogenous functions. Twodi mensional heterogeneous sections of the upper mantle were calculated from traveltime curves to a depth of 500-600 km with allowance for the Earth's curvature without using any a priory information. The presentation of sections as surfaces with a shaded relief combined with velocity contours allowed discerning the principal interfaces in the lithosphere and in the upper mantle, the internal structure of layers, and local heterogeneities of different shapes (convective cells and slabs) in the sections.