Physics
Scientific paper
Jun 1998
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998georl..25.2201a&link_type=abstract
Geophysical Research Letters, Volume 25, Issue 12, p. 2201-2204
Physics
11
Mineralogy And Petrology: Experimental Mineralogy And Petrology, Mineral Physics: High-Pressure Behavior, Tectonophysics: Evolution Of The Earth
Scientific paper
The hydrous phase relations of primitive upper mantle model compositions in the CaO-MgO-Al2O3-SiO2-H2O system with 1, 2 and 5 wt.% H2O have been investigated with a multianvil high pressure apparatus at 6.5 GPa and temperatures from 1550°C to 2050°C. Liquidus temperatures decrease by about 100°C and the temperature interval to produce about 60% partial melting reduces to less than 50°C in the 1-2 wt.% H2O-bearing systems. At an H2O content of about 5 wt.%, garnet is the first dissolved phase and the stability field of orthopyroxene expands. Aluminum undepleted komatiite magmas can be formed by melting at 200 km depth in a hydrous mantle at significantly lower temperatures than under dry conditions. Thus, komatiite magmas cannot constrain temperatures in the Archean mantle. In addition, cratonic peridotites may have formed as residues of partial melting under various H2O contents.
Asahara Yoshihiro
Ohtani Eiji
Suzuki Akihiro
No associations
LandOfFree
Melting relations of hydrous and dry mantle compositions and the genesis 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 hydrous and dry mantle compositions and the genesis of komatiites, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Melting relations of hydrous and dry mantle compositions and the genesis of komatiites will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1332204