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The Mantle Flow Field beneath Western North America

The Mantle Flow Field beneath Western North America. Silver and Holt, Science 295, 1054, 2002 Abigail L. Bull Earthscope Seminar, January 2007. Motivation: Western US Tectonics. www.earth.northwestern.edu. Motivation: Mantle Flow Pattern. Smith et al ., Science 292 , 713 (2001).

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The Mantle Flow Field beneath Western North America

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  1. The Mantle Flow Field beneath Western North America Silver and Holt, Science 295, 1054, 2002 Abigail L. Bull Earthscope Seminar, January 2007

  2. Motivation: Western US Tectonics www.earth.northwestern.edu Earthscope Seminar Abigail L. Bull

  3. Motivation: Mantle Flow Pattern Smith et al., Science 292, 713 (2001). Peyton et al., Geophys. Res. Lett. 28, 379 (2001). Earthscope Seminar Abigail L. Bull

  4. Flow: due to plate motion Flow: due to density anomalies Motivation: Modeling Mantle Flow www.cas.muchio.edu http://www.geo.lsa.umich.edu/~crlb/ Earthscope Seminar Abigail L. Bull

  5. Data: Surface Deformation and Splitting data Silver et al., Science 295, 1054 (2002). Earthscope Seminar Abigail L. Bull

  6. Results Silver et al., Science 295, 1054 (2002). Earthscope Seminar Abigail L. Bull

  7. Conclusions and Implications www.geo.lsa.umich.edu • Mantle constitutes weak drag force Earthscope Seminar Abigail L. Bull

  8. Discussion Topics • Is mantle flow related to velocities of overlying plates? • Does mantle flow have any effect on a plate’s motion? • Are there other methods to determine mantle flow? • What would flow field look like in various tectonic regions? Earthscope Seminar Abigail L. Bull

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