Lars N. Hansen
Postdoctoral Researcher
Department of Earth Sciences
University of Minnesota
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Geol. & Geophys. Dept.
                                           
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Education


Ph.D. in Geophysics, 2012
       University of Minnesota, Minneapolis, Minnesota
M.S. in Geology, 2007
       University of Wyoming, Laramie, Wyoming
B.S. in Earth Sciences (cum laude) with Geology minor, 2005
       California Polytechnic State University, San Luis Obispo, California

Peer-Reviewed Articles


L. N. Hansen, M. E. Zimmerman, D. L. Kohlstedt (in press), The influence of microstructure on deformation of olivine in the grain-boundary sliding regime, J. Geophys. Res.

L. N. Hansen, M. E. Zimmerman, A. Dillman, D. L. Kohlstedt (2012), Strain localization in olivine aggregates at high temperature: An experimental comparison of constant-strain-rate and constant-stress boundary conditions, Earth Planet. Sci. Lett., 333-334, 134-145.

L. N. Hansen, M. E. Zimmerman, D. L. Kohlstedt (2011), Grain-boundary sliding in San Carlos olivine: Flow law parameters and crystallographic-preferred orientation, J. Geophys. Res., 116, B08201.

K. A. Hoffman, B. S. Singer, P. Camps, L. N. Hansen, K. A. Johnson, S. Clipperton, and C. Carvallo (2008), Stability of mantle control over dynamo flux since the mid-Cenozoic, Phys. Earth Planet. In., 169, 20-27.

Articles in Preparation


L. N. Hansen, M. E. Zimmerman, D. L. Kohlstedt, Laboratory measurements of the viscous anisotropy of olivine aggregates, in preparation for submission to Nature.

L. N. Hansen, M. Cheadle, B. John, H. Dick, B. Tucholke, M. Tivey, Mylonitic deformation at the Kane Oceanic Core Complex: Implications for the rheological characteristics of oceanic detachment faults, in preparation for submission to Geochem., Geophys., Geosys.

Posters and Abstracts


M. W. Pendleton, L. N. Hansen, M. E. Zimmerman, D. L. Kohlstedt (2012), Anisotropic viscosity of olivine-chromite-MORB aggregates, 43rd Lunar and Planetary Science Conference.

E. Thompson, A. M. Dillman, L. N. Hansen, D. L. Kohlstedt (2011), Contribution of Grain Boundary Sliding to Diffusion Creep of Forsterite, AGU Fall Meeting, San Francisco, California.

L. N. Hansen, M. E. Zimmerman, D. L. Kohlstedt (2011), A high-strain flow law for olivine: Grain-size sensitivity and crystallographic fabric, AGU Fall Meeting, San Francisco, California.

L. N. Hansen, M. E. Zimmerman, A. M. Dillman, D. L. Kohlstedt (2011), Strain localization in olivine aggregates at high temperature: An experimental comparison of constant-strain-rate and constant-stress boundary conditions, GSA Annual Meeting, Minneapolis, Minnesota.

L. N. Hansen, M. E. Zimmerman, D. L. Kohlstedt (2011), Anisotropic viscosity of iron-bearing olivine deformed to high strain, EarthScope Institute on the Lithosphere-Asthenosphere Boundary, Portland, Oregon.

S. Demouchy, L. N. Hansen, M. E. Zimmerman, A. Tommasi, F. Barou, D. L. Kohlstedt (2011), Water weakening in dunite: Highlights from torsion experiments, Goldschmidt Geochemisty Conference, 21, Conference Proceedings.

L. N. Hansen, M. E. Zimmerman, A. M. Dillman, D. L. Kohlstedt (2011), The influence of shear-zone boundary conditions on strain localization: Results from experimental investigations of olivine rheology at high temperature and high pressure, Penrose Conference on Deformation Localization in Rocks: New advances, Cap de Creus, Spain.

L. N. Hansen, M. E. Zimmerman, D. L. Kohlstedt (2010), Experimental determination of conditions for strain localization in olivine deformed to high strains at high temperature: A comparison of constant stress and constant rate boundary conditions, Gordon Research Conference on Rock Deformation, Tilton, New Hampshire.

L. N. Hansen, M. Cheadle, B. John, S. Swapp, H. Dick, B. Tucholke, M. Tivey (2010), Mylonitic detachment faulting on the Mid-Atlantic Ridge at the Kane Fracture Zone oceanic core complex: Implications for the rheological characteristics of oceanic detachment faults, Chapman Conference on Detachments in Oceanic Lithosphere: Deformation, Magmatism, Fluid Flow and Ecosystems, Agros, Cyprus.

L. N. Hansen, M. E. Zimmerman, D. L. Kohlstedt (2009), Lattice and shape preferred orientation of olivine deformed by dislocation-accommodated grain-boundary sliding, Eos Trans. AGU, 90(52), Fall Meet. Suppl., Abstract DI41B-1794.

L. N. Hansen, M. E. Zimmerman, D. L. Kohlstedt (2009), An experimental investigation of dislocation-accommodated grain-boundary sliding in San Carlos olivine, Deformation Mechanisms, Rheology, and Tectonics, Liverpool, England.

L. N. Hansen, M. Cheadle, B. John, S. Swapp, H. Dick, B. Tucholke, M. Tivey (2007), Styles of detachment faulting at the Kane Oceanic Core Complex, Eos Trans. AGU, 88(52), Fall Meet. Suppl., Abstract T51F-07.

L. N. Hansen, M. Cheadle, B. John, S. Swapp, H. Dick, B. Tucholke, M. Tivey (2006), Deformation associated with the evolution of an oceanic core complex, Gordon Research Conference on Rock Deformation, Big Sky, Montana.

M. Cheadle, B. Tucholke, M. Tivey, H. Dick, J. Schwartz, L. N. Hansen (2005), The nature of detachment faulting at the Kane megamullion: Initial Results, Eos Trans. AGU, 86(52), Fall Meet. Suppl., Abstract T41D-1331.

K. Hoffman, P. Camps, L. N. Hansen, K. Johnson, C. Carvallo (2005), Early Miocene R-N reversal recorded in lavas from Queensland, Australia: Evidence for stationary mantle-held flux over the past 21 Ma, IAGA Meeting, Toulouse, France.

K. Hoffman, P. Camps, B. Singer, L. N. Hansen, K. Johnson, S. Clipperton, C. Carvallo (2005), Early Miocene R-N reversal recorded in lavas from Queensland, Australia: Evidence for stationary mantle-held flux over the past 21 Ma, AGU Joint Assembly, New Orleans, Louisiana.