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Teleseismic P-Wave Tomogram of the Yellowstone Plume

journal contribution
posted on 08.04.2005, 00:00 by H. Y. Yuan, Ken Dueker
Inversion of a new data set of teleseismic P-wave traveltimes 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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eng

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English

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University of Wyoming. Libraries

Journal title

Geophysical Research Letters

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Faculty Publication - Geology & Geophysics

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Faculty Publications - Geology and Geophysics

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