Physics
Scientific paper
Nov 1997
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997georl..24.2837h&link_type=abstract
Geophysical Research Letters, Volume 24, Issue 22, p. 2837-2840
Physics
24
Mineralogy And Petrology: Experimental Mineralogy And Petrology, Mineralogy And Petrology: Major Element Composition
Scientific paper
Partial melt compositions of natural carbonated peridotite (KLB-1+2.5wt% CO2) have been determined at 3 GPa using the diamond aggregate method. Melt obtained at 1350°C is carbonatitic, and with increasing temperature melt composition becomes silicate-rich. These melts are lower in SiO2 and Al2O3 and higher in MgO and CaO compared to dry partial melts of KLB-1 generated at the same pressure. The 1400 and 1450°C liquids have melilititic compositions, which are in good agreement with those of natural alkali-basalts from continental regions. At higher temperatures, partial melts are richer in SiO2, and the compositions of liquids at 1475 and 1525°C approximate nephelinite and basanite respectively. However, they deviate from natural alkaline rocks in that the CaO/(CaO+MgO) ratios are smaller, suggesting that the natural nephelinite and basanite magmas were formed at lower pressures. The compositional trend of natural alkaline rocks, melilitites-nephelinites-basanites, may reflect the effect of decreasing pressure.
No associations
LandOfFree
Partial melt compositions of carbonated peridotite at 3 GPa and role of CO2 in alkali-basalt magma generation 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 Partial melt compositions of carbonated peridotite at 3 GPa and role of CO2 in alkali-basalt magma generation, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Partial melt compositions of carbonated peridotite at 3 GPa and role of CO2 in alkali-basalt magma generation will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1687741