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Some recent advances in understanding the mineralogy of Earth's deep mantle by Thomas S Duffy Philosophical Transactions A Volume 366(1883):4273-4293 November.

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Presentation on theme: "Some recent advances in understanding the mineralogy of Earth's deep mantle by Thomas S Duffy Philosophical Transactions A Volume 366(1883):4273-4293 November."— Presentation transcript:

1 Some recent advances in understanding the mineralogy of Earth's deep mantle by Thomas S Duffy Philosophical Transactions A Volume 366(1883):4273-4293 November 28, 2008 ©2008 by The Royal Society

2 Representative volume–pressure relations for compounds in the post-perovskite (CaIrO3-type) structure. Thomas S Duffy Phil. Trans. R. Soc. A 2008;366:4273-4293 ©2008 by The Royal Society

3 Selected pressure–volume compression data for perovskite (open triangles (dashed line), En100 (Fiquet et al. 2000); open circles, En91Fs09 (Shieh et al. 2006)) and CaIrO3-type (filled squares, En100 (Ono et al. 2006); filled diamonds, En100 (Guignot et al.... Thomas S Duffy Phil. Trans. R. Soc. A 2008;366:4273-4293 ©2008 by The Royal Society

4 Bulk moduli of Fe-bearing perovskite and CaIrO3-type post-perovskite calculated from EOS fits (Shieh et al. 2006) and compared with density functional theory calculations for MgSiO3 (Oganov & Ono 2004). Thomas S Duffy Phil. Trans. R. Soc. A 2008;366:4273-4293 ©2008 by The Royal Society

5 Inverse pole figures from deformation experiments on CaIrO3-type post-perovskites with compositions (a) (Mg,Fe)SiO3 (157 GPa, 300 K; Merkel et al. 2007), (b) MgGeO3 (130 GPa, 300 K; Merkel et al. 2006) and (c) CaIrO3 (6 GPa, 800 K; Miyagi et al. 2008). Thomas S Duffy Phil. Trans. R. Soc. A 2008;366:4273-4293 ©2008 by The Royal Society

6 Crystallographic b/a ratio for selected post-perovskites from figure 1. Thomas S Duffy Phil. Trans. R. Soc. A 2008;366:4273-4293 ©2008 by The Royal Society

7 Average bond lengths from single-crystal X-ray diffraction, powder X-ray diffraction analysed by the Rietveld method and theoretical studies of ABX3 post-perovskites and other phases. Thomas S Duffy Phil. Trans. R. Soc. A 2008;366:4273-4293 ©2008 by The Royal Society

8 Molar volume difference between the liquid and the solid normalized to molar volume of the solid for MgSiO3 and MgO liquids from recent first-principles simulations. Thomas S Duffy Phil. Trans. R. Soc. A 2008;366:4273-4293 ©2008 by The Royal Society


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