CALL FOR PROPOSALS:

ORGANIZERS

  • Harvey Thorleifson, Chair
    Minnesota Geological Survey
  • Carrie Jennings, Vice Chair
    Minnesota Geological Survey
  • David Bush, Technical Program Chair
    University of West Georgia
  • Jim Miller, Field Trip Chair
    University of Minnesota Duluth
  • Curtis M. Hudak, Sponsorship Chair
    Foth Infrastructure & Environment, LLC

 

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Paper No. 2
Presentation Time: 8:30 AM

SPIN CROSSOVER SYSTEMS IN THE DEEP MANTLE


WENTZCOVITCH, Renata, Chemical Engineering and Materials Science, University of Minnesota, 421 Washington Ave SE, Minneapolis, MN 55455 and HSU, Han, Chemical Engineering and Materials Science, University of Minnesota, 421 Washington Ave SE, Minneapolis, 55455, wentz002@umn.edu

There has been much interest on spin crossovers found experimentally in the most abundant minerals of Earth’s lower mantle ((MgFe)O and (MgFe)(Si,Fe)O3-perovskite) under pressure. Spin crossovers are strongly dependent on thermodynamic conditions and a full understanding of this problem requires its investigation as function of pressure and temperature. There are several controversies, especially in the perovskite systems, and surprises are revealed by electronic structure calculations. The geophysical consequences of these crossovers are yet to be fully understood. I will review progress we have made in understanding spin crossovers and give an overview of this phenomenon and its potential implications for the Earth.

Research in collaboration with K. Umemoto, J. F. Justo, C. R. S. da Silva, M. Cococcioni, S. de Gironcoli, and P. Blaha. Research supported by NSF/ATM-0428774, EAR-0810212, EAR-1047629, and the MRSEC Program of NSF under Awards Number DMR-0212302 and DMR-0819885.

Session No. 147

T30. Earth's Deep Interior: In Honor of Motohiko Murakami, 2011 MSA Awardee
Tuesday, 11 October 2011: 8:00 AM-12:00 PM
Room 102BC (Minneapolis Convention Center)
Geological Society of America Abstracts with Programs. Vol. 43, No. 5, p.368
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