Mantle transition zone topography and structure beneath the Yellowstone hotspot
Article first published online: 17 SEP 2004
Copyright 2004 by the American Geophysical Union.
Geophysical Research Letters
Volume 31, Issue 18, September 2004
How to Cite
2004), Mantle transition zone topography and structure beneath the Yellowstone hotspot, Geophys. Res. Lett., 31, L18603, doi:10.1029/2004GL020636., and (
- Issue published online: 17 SEP 2004
- Article first published online: 17 SEP 2004
- Manuscript Accepted: 9 AUG 2004
- Manuscript Revised: 27 JUL 2004
- Manuscript Received: 31 MAY 2004
 The depths of the 410 and 660 km discontinuities beneath the Yellowstone hotspot are constrained using common conversion point imaging of P-wave receiver functions. The mean depth of the 410 and 660 is 411 ± 1.5 km and 656 ± 1.6 km, with 36–40 km of peak to peak topography. This topography is spatially uncorrelated, providing no evidence for a lower mantle plume currently beneath the hotspot. The topography suggests that ±200°C thermal anomalies exist with respect to an average mantle adiabat. Two warmer than normal regions are found: at the 410 to the NNW of the hotspot and at the 660 to the NE. Colder temperatures exist at the 410 under central Wyoming. Upper mantle convection and/or intermittent heat and mass transfer across the 660 may be responsible for the uncorrelated topography. Three negative arrivals about the 410 and 660 are observed that display correct Pds moveout.