Melting relations of the hydrous primitive mantle in the CMAS-H2O system at high pressures and temperatures, and implications for generation of komatiites

Details Melting relations of the hydrous primitive mantle in the CMAS-H2O system at high pressures and temperatures, and implications for generation of komatiites Melting relations of the hydrous primitive mantle in the CMAS-H2O system at high pressures and temperatures, and implications for generation of komatiites

Oct 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001pepi..125...31a&link_type=abstract

Physics of the Earth and Planetary Interiors, Volume 125, Issue 1-4, p. 31-44.

Physics

7

Scientific paper

The hydrous phase relations of primitive mantle compositions in the CaO-MgO-Al2O3-SiO2-H2O system with 1, 2, and 5wt.% H2O have been investigated at 4, 6.5, and 8GPa. The stability field of orthopyroxene in the residue expands with increasing H2O content at 4-8GPa. Dissolution temperature of garnet decreases more rapidly than that of the other phases at 4 and 6.5GPa. The dissolution curves of garnet and pyroxenes cross at 6GPa and 1700°C in the 2wt.% H2O-bearing system. Garnet is stable until high degree of melting at 8GPa. Compositions of aluminum depleted komatiites are consistent with the liquid formed by more than 30% melting of the primitive mantle with H2O up to 5wt.% at 8GPa. Aluminum undepleted komatiite can be formed by more than 50wt.% melting of dry and wet primitive peridotite (with water up to 2wt.% H2O) at around 4-6GPa. Variation in chemistry of komatiites might be explained by partial melting of primitive mantle with various water contents.

Affiliated with

Also associated with

No associations

Rating

Melting relations of the hydrous primitive mantle in the CMAS-H2O system at high pressures and temperatures, and implications for generation of komatiites 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 Melting relations of the hydrous primitive mantle in the CMAS-H2O system at high pressures and temperatures, and implications for generation of komatiites, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Melting relations of the hydrous primitive mantle in the CMAS-H2O system at high pressures and temperatures, and implications for generation of komatiites will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1007004