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Sci Rep. 2013;3:1137. doi: 10.1038/srep01137. Epub 2013 Jan 25.

Linking mantle upwelling with the lithosphere descent [corrected] and the Japan Sea evolution: a hypothesis.

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1
Institut für Angewandte Geowissenschaften, Karlsruher Institut für Technologie, Karlsruhe, Germany. Alik.Ismail-Zadeh@kit.edu

Erratum in

  • Sci Rep. 2013 Feb 18;3:1322.

Abstract

Recent seismic tomography studies image a low velocity zone (interpreted as a high temperature anomaly) in the mantle beneath the subducting Pacific plate near the Japanese islands at the depth of about 400 km. This thermal feature is rather peculiar in terms of the conventional view of mantle convection and subduction zones. Here we present a dynamic restoration of the thermal state of the mantle beneath this region assimilating geophysical, geodetic, and geological data up to 40 million years. We hypothesise that the hot mantle upwelling beneath the Pacific plate partly penetrated through the subducting plate into the mantle wedge and generated two smaller hot upwellings, which contributed to the rapid subsidence in the basins of the Japan Sea and to back-arc spreading. Another part of the hot mantle migrated upward beneath the Pacific lithosphere, and the presently observed hot anomaly is a remnant part of this mantle upwelling.

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