3. Examples for apatite saturation temperature (AST) calculation
Calculate apatite saturation temperature
The apatite saturation temperature is calculated using the empirical equation of Harrison & Watson (1984) https://doi.org/10.1016/0016-7037(84)90403-4
[1]:
import pyAp.ApSatTemp as calc_AST
Inputs are SiO
and PO
concentrations in the melt.
Note that concetrations are in weight percent (between 0 and 100) instead of mass fractions (=concentration wt/100; between 0 and 1).
When mass fractions are used for calculation:
[2]:
calc_AST.AST(0.55,0.003)
>> Warning: Concentrations are expressed as mass fractions.
Multiply them by 100 to convert into percentage!
[2]:
nan
When wt% concentrations are used for calculation:
[3]:
calc_AST.AST(55,0.3)
[3]:
849.3629335400316