Intermediate-spin ferrous iron in lowermost mantle post-perovskite and perovskite

Nature Geoscience

Volumn 1, Issue 10, 2008, Pages 688-691

  Lin, Jung Fu ^a   Watson, Heather ^b   Vankó, György ^c   Alp, Esen E ^d   Prakapenka, Vitali B ^e   Dera, Przemek ^e   Struzhkin, Viktor V ^f   Kubo, Atsushi ^e   Zhao, Jiyong ^d   McCammon, Catherine ^g   Evans, William J ^b  

^a UNIVERSITY OF TEXAS AT AUSTIN   (United States)

^b LAWRENCE LIVERMORE NATIONAL LABORATORY   (United States)

^c WIGNER RESEARCH CENTRE FOR PHYSICS   (Hungary)

^d ARGONNE NATIONAL LABORATORY   (United States)

^e UNIVERSITY OF CHICAGO   (United States)

^f GEOPHYSICAL LABORATORY   (United States)

^g UNIVERSITÄT BAYREUTH   (Germany)

Author keywords

[No Author keywords available]

Indexed keywords

EID: 65349122434     PISSN: 17520894     EISSN: 17520908     Source Type: Journal    
DOI: 10.1038/ngeo310     Document Type: Article

References (30)

1. Garnero, E. J., Maupin, V., Lay, T. & Fouch, M. J. Variable azimuthal anisotropy in Earth's lowermost mantle. Science 306, 259-261 (2004).
2. Hernlund, J. W., Thomas, C. & Tackley, P. J. A doubling of the post-perovskite phase boundary and structure of the Earth's lowermost mantle. Nature 434, 882-886 (2005).
3. Lay, T., Hernlund, J., Garnero, E. J. & Thorne, M. S. A post-perovskite lens and D″ heat flux beneath the central Pacific. Science 314, 1272-1276 (2006).
4. van der Hilst, R. D. et al. Seismostratigraphy and thermal structure of Earth's core-mantle boundary region. Science 315, 1813-1817(2007).
5. 3. Science 304, 855-858 (2004).
6. Oganov, A. R. & Ono, S. Theoretical and experimental evidence for a post-perovskite phase of MgSiO, in Earth's D″ layer. Nature 430, 445-448 (2004).
7. 3 post-perovskite at lower mantle pressures. Science 311, 644-646(2006).
8. Matyska, C. & Yuen, D. A. The importance of radiative heat transfer on superplumes in the lower mantle with the new post-perovskite phase change. Earth Planet. Sci. Lett. 234, 71-81 (2005).
9. Matyska, C. & Yuen, D. A. Lower mantle dynamics with the post-perovskite phase change, radiative thermal conductivity, temperature-and depth-dependent viscosity. Phys. Earth Planet. Inter. 154, 196-207 (2006).
10. Naliboff, J. B. & Kellogg, L. H. Dynamic effects of a step-wise increase in thermal conductivity and viscosity in the lowermost mantle. Geophys. Res. Lett. 33, L12S09 (2006).
11. Buffett, B. A bound on heat flow below a double crossing of the perovskite-postperovskite phase transition. Geophys. Res. Lett. 34, L17302 (2007).
12. Hofmeister, A. M. & Yuen, D. A. Critical phenomena in thermal conductivity: Implications for lower mantle dynamics. J. Geodyn. 44, 186-199 (2007).
13. Mao, W. L. et al. Ferromagnesian postperovskite silicates in the D″ layer of the Earth. Proc. Natl Acad. Sci. USA 101, 15867-15869 (2004).
14. 3 post-perovskite, perovskite, and magnesiowüstite in the Earth's lower mantle. Geophys. Res. Lett. 32, L19302 (2005).
15. Murakami, M., Hirose, K., Sata, N. & Ohishi, Y Post-perovskite phase transition and mineral chemistry in the pyrolitic lowermost mantle. Geophys. Res. Lett. 32, L03304 (2005).
16. Lin, J. F., Jacobsen, S. D. & Wentzcovitch, R. M. Electronic spin transition of iron in the Earth's deep mantle. Eos Trans. Am. Geophys. Union 88, 13-17 (2007).
17. Badro, J. et al. Electronic transitions in perovskite: Possible nonconvecting layers in the lower mantle. Science 305, 383-386 (2004).
18. Li, J. et al. Electronic spin state of iron in lower mantle perovskite. Proc. Natl Acad. Sci. USA 101, 14027-14030(2004).
19. 3 perovskite up to 120 GPa. Am. Mineral. 90, 199-205 (2005).
20. Goncharov, A. F., Struzhkin, V. V. & Jacobsen, S. D. Reduced radiative conductivity of low-spin (Mg,Fe)O in the lower mantle. Science 312, 1205-1208 (2006).
21. 3 post-perovskite. Geophys. Res. Lett. 33, L12S03 (2006).
22. Zhang, F. & Oganov, A. R. Valence state and spin transitions of iron in Earth's mantle silicates. Earth Planet. Sci. Lett. 249, 436-443 (2006).
23. 3 system. Earth Planet. Sci. Lett. 265, 535-545 (2008).
24. Keppler, H., Kantor, I. & Dubrovinsky, L. S. Optical absorption spectra of ferropericlase to 84 GPa. Am. Mineral. 92, 433-436 (2007).
25. Lin, J. F. et al. Spin transition zone in Earth's lower mantle. Science 317, 1740-1743 (2007).
26. McCammon, C. et al. Intermediate-spin ferrous iron in lower mantle perovskite. Nature Geosci. 1, 684-687 (2008).
27. 3 perovskite. Earth Planet. Sci. Lett. 253, 282-290 (2007).
28. Sturhahn, W. Nuclear resonant spectroscopy. J. Phys. Condens. Matter 16, S497-S530 (2004).
29. Fei, Y et al. Toward an internally consistent pressure scale. Proc. Natl Acad. Sci. USA 104, 9182-9186 (2007).
30. Vankó, G. et al. Probing the 3d spin momentum with X-ray emission spectroscopy: The case of molecular-spin transitions. J. Phys. Chem. B 110, 11647-11653 (2006).