Opx-Cpx termometer Bertrand P., Mercier J.-C.C., 1985

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The mutual solubility of coexisting ortho- and clinopyroxene: toward an absolute geothermometer for the natural system?

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Source	Bertrand P., Mercier J.-C.C. The mutual solubility of coexisting ortho- and clinopyroxene: toward an absolute geothermometer for the natural system? Earth Planet. Sci. Lett.,V.76,N.1/2,p.109-122,1985
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Calibration
Accuracy
Ranges	900-1200 °C
Renew sensors

Code

P = depend['P']
T = None
c = recalc('Opx',assoc['Opx'])
X = c['Na']
c = recalc('Opx',assoc['Opx'])
Y = c['Ca']
c = recalc('Cpx',assoc['Cpx'])
Z = c['Na']
c = recalc('Cpx',assoc['Cpx'])
F = c['Ca']
c = recalc('Cpx',assoc['Cpx'])
K = (c['Fe2']+c['Fe3'])/(c['Fe2']+c['Fe3']+c['Mg'])
A = 36273+399*P/10
C = 1-Y/(1-X)
B = F/(1-Z)+(-0.77+0.001*T)*K
L = log((1-B)/C)
ZERO = A/(19.31-8.314*L-12.15*B**2)-T
T = T-273