Physics
Scientific paper
Dec 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002agufmmr72b1042j&link_type=abstract
American Geophysical Union, Fall Meeting 2002, abstract #MR72B-1042
Physics
1015 Composition Of The Core, 1025 Composition Of The Mantle, 3672 Planetary Mineralogy And Petrology (5410), 7207 Core And Mantle, 8124 Earth'S Interior: Composition And State (Old 8105)
Scientific paper
Recent measurements of Chudinovskikh and Boehler (2002) show that the MgSiO3 Ilmenite-Perovskite phase boundary has a Clapeyron slope of -6 MPa/K, substantially more negative relative to previous determinations (e.g. Ono et al., 2001, Kato et al., 1995). Such negative slope has major implications for the style of mantle convection above and below the 660 km discontinuity. We have modified the thermodynamic parameters of the magnesium endmembers of the olivine-pyroxene system contained in the database of Saxena (Saxena, 1996). Our results indicate that the more negative Clapeyron slope can be accounted for, using these modified parameters, with minor perturbations to the phase diagrams and the material properties such as expansivity and density, of the pyroxene MgSiO3 and olivine Mg2SiO_4 subsystems. The ensuing data base has served as starting point for a mantle convection experiment in which the impact of the more negative Clapeyron slope on the degree of layering in mantle convection has been evaluated (van den Berg et al., 2002, Fall AGU Meeting). Chudinovskikh and Boehler, (2002, pers.com.) \S. Ono et al., Geophys. Res. Lett., 28, 835 (2001). \T. Kato et al., J. Geophys. Res., 100, 20475 (1995). S.K. Saxena, Geochim. Cosmochim. Acta, 60, 2379-2395 (1996).
de Jong B. H.
Jacobs M. H.
van den Berg Arie P.
No associations
LandOfFree
More negative Clapeyron slope in the perovskite-ilmenite MgO-SiO2 system can be accommodated in existing data bases does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with More negative Clapeyron slope in the perovskite-ilmenite MgO-SiO2 system can be accommodated in existing data bases, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and More negative Clapeyron slope in the perovskite-ilmenite MgO-SiO2 system can be accommodated in existing data bases will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1892535