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Mantle structure beneath the western United States and its implications for convection processes
 

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Mantle structure beneath the western United States and its
implications for convection processes
Mei Xue1,2
and Richard M. Allen2
Received 6 September 2008; revised 20 July 2009; accepted 22 February 2010; published 13 July 2010.
[1] We present tomographic images of the mantle structure beneath the western United
States. Our Dynamic North America Models of P and S velocity structure (DNA07 P and
DNA07 S) use teleseismic body waves recorded at 600 seismic stations provided by
the Earthscope Transportable Array and regional networks. DNA07 P and S benefit from
the unprecedented aperture of the network while maintaining a dense station distribution
providing high resolution body wave imaging of features through the transition zone
and into the lower mantle. The main features imaged include (1) the Juan de Fuca
subduction system that bottoms at 400 km beneath Oregon, implying interaction with the
Yellowstone anomaly; (2) a low velocity conduit beneath Yellowstone National Park that
bottoms at 500 km and dips toward the northwest; (3) shallow low velocity anomalies

  

Source: Allen, Richard M. - Seismological Laboratory, Department of Earth and Planetary Science, University of California at Berkeley

 

Collections: Geosciences