RT Journal Article
SR Electronic
T1 Experimental studies on Bowen's decarbonation series; [Part] 2, P-T univariant equilibria of the reaction, Forsterite+calcite=monticellite+periclase+CO <sub>2</sub>
JF American Journal of Science
JO Am J Sci
FD American Journal of Science
SP 773
OP 779
DO 10.2475/ajs.261.8.773
VO 261
IS 8
A1 Walter, L. S.
YR 1963
UL http://www.ajsonline.org/content/261/8/773.abstract
AB The P-T univariant equilibrium curve for the reaction (A) calcite+forsterite = monticellite+ periclase+ CO 2 has been experimentally determined to pass through the points: 725 degrees C., 1300 psi CO2 ; 850 degrees C, 4400 psi CO2 and 925 degrees C, psi CO2 . The curve is coincident, within the limits of experimental error, with curves for the reactions: (B) 2 calcite+ forsterite + diopside = 3 monticellite + 2CO 2 and (C) calcite+diopside=akermanite+CO 2 . The P CO2 -T field of stability of the assemblage monticellite - forsterite - calcite -CO 2 which lies between the curves for reactions (A) and (B) is thus very small. The forsterite - calcite assemblage is usually produced by contact metamorphism by granitic rock types. Equilibrium pressure curves for reaction (A) are derived.