Department of Geology and Geophysics People

Additional Information

Research Fields

  Geophysics, Seismology

Research Topics

  Mantle structure and dynamics
  Mantle flow and melt supply beneath mid-ocean ridges
  Magma chamber structure
  Body and surface wave seismic tomography

  Acoustic detection and tracking of marine mammals

Courses

Undergraduate
  GG313 Geological Data Analysis I
Graduate
  GG612 Accelerated Introduction to Geology
  GG630 Numerical Methods
  GG650 Seismology
  GG685 Inverse Theory
  GG699 Directed Research
  GG700 Thesis Research
  GG711 Special Topics in Geology and Geophysics

Graduate Students
  Michaela Conley       MS current
  Andrew Delorey        MS 2006
  Olga Hernandez       MS 2005 (exchange with Ecole Normale Supérieure de Paris)

Publications

Dunn, RA and O Hernandez, Tracking blue whales in the eastern tropical Pacific with an ocean-bottom seismometer and hydrophone array, J. Acoust. Soc. Am., in review, manuscript number 08-06147.

Dunn, RA, Numerical modeling of surface wave focusing effects along mid-ocean ridges: implications for East Pacific Rise anisotropy and attenuation, Geophys. J. Int., in revision, manuscript number GJI-08-0291.

Ito, G and RA Dunn, Oceanic Spreading Centers:  Mantle Convection and Formation of the Lithosphere, Encyclop. Ocean Sci., in press.

Dunn, RA and DW Forsyth, Crust and Lithospheric Structure – Seismic Structure of Mid-Ocean Ridges, in Treatise on Geophysics, eds. A. Dziewonski and B. Romanowicz, Elsevier Science Ltd., 6054 pp., 2007.

Delorey, AA, RA Dunn, and JB Gaherty, Surface wave tomography of the upper mantle beneath the Reykjanes Ridge with implications for ridge–hot spot interaction, J. Geophys. Res., 112, B08313, doi: 10.1029/2006JB004785, 2007.

Gaherty, JB, and RA Dunn, Evaluating hotspot-ridge interaction in the Atlantic from regional-scale seismic observations, Geochem. Geophys. Geosyst., 8, Q05006, doi: 10.1029/2006GC001533, 2007.

Toomey, DR, D Jousselin, RA Dunn, RS Detrick, WSD Wilcock, Mantle upwelling and its relation to ridge crest processes along the East Pacific Rise, 9˚-10˚N, Nature, 446; doi: 10.1038/nature05679; 22 March 2007.

Genz, AS, CH Fletcher, RA Dunn, LN Frazer, JJ Rooney, The predictive accuracy of shoreline change rate methods and alongshore beach variation on Maui, Hawaii, J. Coastal Res., 23(1), 87-105, 2007.

Dunn, RA, V Lekic, RS Detrick, and DR Toomey, Three-dimensional seismic structure of the Mid-Atlantic Ridge at 35˚N: focused melt supply and non-uniform plate spreading, J. Geophys. Res., 110, B09101, doi: 10.1029/2004JB003473, 2005.

Dunn, RA, and DW Forsyth, Imaging the transition between the region of mantle melting and the crustal magma chamber beneath the southern East Pacific Rise with short-period Love waves, J. Geophys. Res., 108(B7), 2352, doi: 10.1029/2002JB002217, 2003.

Cherkaoui, ASM, WSD Wilcock, RA Dunn, and DR Toomey, A numerical model of hydrothermal cooling and crustal accretion at a fast spreading mid-ocean ridge, Geochem. Geophys. Geosyst., 4(9), 8616, doi: 10.1029/2001GC000215, 2003.

Jousselin, D, RA Dunn, DR Toomey, Modeling the seismic signature of structural data from the Oman Ophiolite: Can a mantle diapir be detected beneath the East Pacific Rise?, Geochem. Geophys. Geosyst., 4(7), 8610, doi: 10.1029/2002GC000418, 2003.

Dunn, RA, and DR Toomey, Crack-induced seismic anisotropy in the oceanic crust across the East Pacific Rise (9°30'N), Earth Planet. Sci. Lett., 189, 9-17, 2001.

Dunn, RA, DR Toomey, RS Detrick, and WSD Wilcock, Continuous mantle melt supply beneath an overlapping spreading center on the East Pacific Rise, Science, 291, 1955-1958, 2001.

Dunn, RA, DS Scheirer, and DW Forsyth, A detailed comparison of repeated bathymetric surveys along a 300-km-long section of the southern East Pacific Rise, J. Geophys. Res., 106, 463-472, 2001.

Dunn, RA, DR Toomey, and SC Solomon, Three-dimensional seismic structure and physical properties of the crust and shallow mantle beneath the East Pacific Rise at 9°30'N, J. Geophys. Res., 105, 23,537-23,555, 2000.

Dunn, RA and DR Toomey, Seismological evidence for three-dimensional melt migration beneath the East Pacific Rise, Nature, 388, 259-262, 1997.

Cuny, J, RA Dunn, ST Hackstadt, CW Harrop, HH Hersey, AD Malony, and DR Toomey, Building domain-specific environments for computational science: a case study in seismic tomography, Inter. J. Supercomp. App. High Perf. Comp., 11, 179-196, 1997.

Dunn, RA, Three-dimensional seismic structure and physical properties of the crust and shallow mantle beneath the East Pacific Rise at 9°30'N, Doctoral Thesis, University of Oregon, Eugene, 1999.