David Kohlstedt

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David L. Kohlstedt (* around 1943 ) is an American geophysicist.

Kohlstedt earned his bachelor's degree from Valparaiso University in 1965 and his master's degree from the University of Illinois in 1967 , where he received his doctorate in physics in 1970. As a post-doctoral student he was at the Cavendish Laboratory in Cambridge and from 1971 to 1975 at Michigan Technological University . He also worked at the Massachusetts Institute of Technology with Christ Goetze and Bill Brace. In 1975 he became an assistant professor and later professor at Cornell University . From 1989 he was a professor at the University of Minnesota .

He experimentally investigated the deformation and kinetic behavior of rocks at high pressures and temperatures similar to those in the upper mantle and the deeper earth's crust, for example during tectonic processes in mid-ocean ridges. He found that even a small amount of water leads to a considerable reduction in viscosity and is essential for the formation of convection currents in the Earth's interior, which lead to plate tectonics, which are missing on the arid Venus, for example. Likewise, even a small proportion of molten material changes to migration processes that lead to the self-organization of shear zones enriched with melt and to transport channels from the melt to the earth's surface. He also investigated the role of point defects in crystals on diffusion processes. He also dealt with flow laws for ice with application in glacier dynamics .

Among other things, he was visiting scholar at the Australian National University , the Leibniz University Hannover (1984), in 2005 as Moore Scholar at Caltech and in 1993/94 with a Humboldt Research Award at the University of Bayreuth .

In 2005 he received the Louis Néel Medal ,

He also received the Hess Medal of the American Geophysical Union in 2003 and the Murchison Medal in 2009 . He is a member of the National Academy of Sciences (2009) and the American Academy of Arts and Sciences (2000).

David Kohlstedt is married to the science historian Sally Gregory Kohlstedt .

Fonts

  • with BK Holtzman BK Shearing melt out of the Earth: An experimentalist's perspective on the influence of deformation on melt extraction , Annual Review Earth Planet. Sci. 37, 2009, 561-593
  • with S. Demouchy, SE Schneider, SJ Mackwell, ME Zimmerman Experimental deformation of olivine single crystals at lithospheric temperatures , Geophys. Res. Lett. 36, L04304
  • with S. J: Mackwell Strength and deformation of planetary lithospheres , in TR Watters, RA Schultz Planetary Tectonics , Cambridge University, 2010, 397–456
  • with S. Mei, AM Suzuki, AM, NA Dixon, NA, WB Durham Experimental constraints on the strength of the lithospheric mantle , J. Geophys. Res. 115, 2010, B08204
  • with T. Hiraga Systematic distribution of incompatible elements in mantle peridotite: Importance of intra- and inter-granular melt-like components , Contrib. Mineral. Petrol. 158, 2009, 149-167
  • with S. Mackwell Diffusion of hydrogen and intrinsic point defects in Olivine , Z. Phys. Chemie, 207, 1998, 147-162
  • with William Brace Limits of lithospheric stress imposed by laboratory experiments , J. Geophys. Research, 85, 1980, 6248-6252
  • with David L. Goldsby: Superplastic deformation of ice: Experimental observations, Journal of Geophysical Research, Volume 106, 2001, pp. 11017-11030

Web links

Individual evidence

  1. ↑ Career data based on American Men and Women of Science , Thomson Gale 2004
  2. ↑ Laudatory speech
  3. ^ Book of Members. Retrieved July 23, 2016 .
  4. ^ The Geological Society of London - 2009 Awards: Citations, Replies. In: geolsoc.org.uk. Retrieved November 18, 2018 .
personal data
SURNAME Kohlstedt, David
ALTERNATIVE NAMES Kohlstedt, David L.
BRIEF DESCRIPTION American geophysicist
DATE OF BIRTH around 1943