Teleseismic P-wave tomogram of the Yellowstone plume

Details Teleseismic P-wave tomogram of the Yellowstone plume Teleseismic P-wave tomogram of the Yellowstone plume

Apr 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005georl..3207304y&link_type=abstract

Geophysical Research Letters, Volume 32, Issue 7, CiteID L07304

Physics

22

Seismology: Lithosphere (1236), Tectonophysics: Dynamics Of Lithosphere And Mantle: General (1213), Tectonophysics: Tomography (6982, 7270)

Scientific paper

Inversion of a new data set of teleseismic P-wave travel-times from three PASSCAL seismic deployments around the Yellowstone hotspot reveals a 100 km diameter upper mantle plume that extends from the Yellowstone volcanic caldera to 500 km depth and dips 20° to the northwest. A monotonic decrease in the velocity perturbation of the plume from -3.2% at 100 km to -0.9% at 450 km is consistent with a uniform thermal anomaly of 180°C. Where the plume crosses the 410 km discontinuity, previous research shows a depression in the 410 km discontinuity consistent with a warm plume (Fee and Dueker, 2004). Additionally, a region of high velocities extends to 250 km beneath the Wind River basin in NW Wyoming that may represent a convective downwelling of the lithosphere.

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