Quick Search:    advanced search

GSW Home   GeoRef Home   My GSW Alerts   Contact GSW   About GSW   Journals List   Help

This Article Figures Only Full Text Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Citation Map Services Email this article to a friend Similar articles in this journal Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via Web of Science (8) Citing Articles via Google Scholar Google Scholar Articles by DUBROVINSKY, L. Articles by HARRYSON, H. Search for Related Content GeoRef GeoRef Citation

Stability of (Mg_0.5Fe_0.5)O and (Mg_0.8Fe_0.2)O magnesiowüstites in the lower mantle

Institute of Earth Sciences, Uppsala University, S-752 36 Uppsala, Sweden

^* e-mail: Leonid.Dubrovinsky{at}geo.uu.se

We have heated magnesiowüstites (Mg_0.5Fe_0.5)O and (Mg_0.8Fe_0.2)O to temperatures of over 1000 K at pressures of over 80 GPa simulating the stability of the solid solution at physical conditions relevant to the Earth's lower mantle. The X-ray study of the externally heated samples in diamond-anvil cells shows that magnesiowüstite may dissociate into a magnesium-rich and an iron-rich oxide component. The result is important because the decomposition of magnesiowüstite into lighter and heavier phases will cause dynamic effects that could lead to mantle heterogeneity.

Key-words: magnesiowüstite, high pressure, immiscibility, Earth's lower mantle, diamond-anvil cell.

This article has been cited by other articles:

				J.-F. Lin, D. L. Heinz, H.-k. Mao, R. J. Hemley, J. M. Devine, J. Li, and G. Shen Stability of magnesiowustite in Earth's lower mantle PNAS, April 15, 2003; 100(8): 4405 - 4408. [Abstract] [Full Text] [PDF]