Hello,
I am contacting you because I am having trouble to find out how rhyolite MELTS works for extracting compositions for a temperature range by fractional crystallization.
First, is this action is possible to do ?
Here is the composition for my basalt:
Initial Composition: SiO2 49.2
Initial Composition: TiO2 0.901
Initial Composition: Al2O3 14.13
Initial Composition: Fe2O3 8.65
Initial Composition: Cr2O3 0.00
Initial Composition: FeO 7.78
Initial Composition: MnO 0.076
Initial Composition: MgO 8.63
Initial Composition: CaO 4.57
Initial Composition: Na2O 0.57
Initial Composition: K2O 3.88
Initial Composition: P2O5 0.12
Initial Composition: H2O 0.5
Initial Temperature: 1220.00
Final Temperature: 700.00
Increment Temperature: 10.00
Initial Pressure: 1000.00
Final Pressure: 1000.00
Increment Pressure: 0.00
dp/dt: 0.00
log fo2 Path: None
I would like to compute rhyolite MELTS from 1220 celsius to 700 celsius, with an increment of 10 degrees celsius, and obtain the composition every 10 degrees.
The result of this would be next, to calculate the M value from the melt composition at each step (from Boenhke et al., 2013), determine the partition coefficient, and then work out the Zircon saturation temperature.
After that, I would have to use Zr of my WR data between the available melt and trace the evolution of the Zr concentration of the melt during fractional crystallization. Finally I should find out the zircon saturation point in the melt by plotting the Zr concentration vs Temperature.
I hope it is clear and understanding.
Thank you very much for your help !
Frederic Dufour