Seismological detection of a mantle plume?

Details Seismological detection of a mantle plume? Seismological detection of a mantle plume?

Jul 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993natur.364..115n&link_type=abstract

Nature (ISSN 0028-0836), vol. 364, no. 6433, p. 115-120.

Mathematics

Logic

51

Earth Mantle, Seismology, Canada, Earth Core, Earthquakes, Traveling Waves, Volcanoes

Scientific paper

A detailed seismological study of the mantle beneath the Bowie hotspot, west of Canada, reveals a zone of low seismic velocities. The anomaly, probed at a depth of about 700 km, adds a delay of 0.15 s to the travel times of seismic waves traversing a region about 150 km in diameter, located about 150 km away from the vertical projection of the Bowie seamount. This observation suggests that a mantle plume is present in the lower mantle beneath Bowie, with the amplitude of the anomaly implying a temperature contrast of about about 300 K.

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