Teleseismic P-Wave Tomogram of the Yellowstone Plume
نویسندگان
چکیده
[1] 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. Citation: Yuan, H., and K. Dueker (2005), Teleseismic P-wave tomogram of the Yellowstone plume, Geophys. Res. Lett., 32, L07304, doi:10.1029/2004GL022056.
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