Thermobarometers

This list documents the thermobarometers and thermometers currently implemented within meltPT. To use each option, the abbreviated name at the beginning of each option can be typed within the method flag of compute_pressure_temperature(), compute_temperature() and/or compute_pressure(). The associated equation names in the list below refer to the equations in the original papers. See the code documentation for more details.

Currently Available Options

• P08 - Putirka (2008, Revs. in Min. and Geo.)

  Simultaneous calculation of pressure and temperature using Equations 42 and 22, respectively.

• L09 - Lee et al. (2009, EPSL)

  T and P(T) calculated using Equations 3 and 2, respectively.

• TGK12_PLG - Till et al. (2012, JGR: Solid Earth)

  P and T(P) calculated using Lines 1 and 2 of Table 5, respectively. Plagioclase must be stable mantle phase.

• TGK12_SPL - Till et al. (2012, JGR: Solid Earth)

  P and T(P) calculated using Lines 3 and 4 of Table 5, respectively. Spinel must be stable mantle phase.

• PF16 - Plank and Forsyth (2016, G-cubed)

  T and P(T) calculated using Equations 1 and 2, respectively. Corrected for CO2 using Equation 3.

• SD20 - Sun and Dasgupta (2020, EPSL)

  Simultaneous calculation of pressure and temperature using Equations 4 and 6, respectively.

• BK21 - Brown Krien et al. (2021, JGR: Solid Earth)

  Selects and applies the best thermobarometer for a given sample composition from BK21_PLG, BK21_SPL, BK21_GNT.

• BK21_PLG - Brown Krien et al. (2021, JGR: Solid Earth)

  P and T(P) calculated using Equations 1P-P and 1P-T, respectively. Assumes plagioclase is stable mantle phase.

• BK21_SPL - Brown Krien et al. (2021, JGR: Solid Earth)

  P and T(P) calculated using Equations 1S-P and 1S-T, respectively. Assumes spinel is stable mantle phase.

• BK21_GNT - Brown Krien et al. (2021, JGR: Solid Earth)

  P and T(P) calculated using Equations 1G-P and 1G-T, respectively. Assumes garnet is stable mantle phase.

Thermometer Only

• B93 - Beattie, (1993, Contrib. to Min. and Pet.)

  Calculates temperate of olivine liquidus using Equation 10.

• P07_2 - Putirka et al. (2007, Chemical Geology)

  Calculates temperate using Equation 2.

• P07_4 - Putirka et al. (2007, Chemical Geology)

  Calculates temperate using Equation 4.

• HA15 - Herzberg and Asimow (2015, G-cubed)

  Calculate temperate using B93 converted to desired pressure using Equation 12.

Unfinished Thermobarometers

• G13 - Grove et al. (2013, Contrib. Min. and Pet.)

Custom Thermobarometers

We have designed meltPT so that additional thermobarometers can be easily included. If meltPT does not include a thermobarometer you would like to use, see Tutorial 6: Custom Thermobarometers for instructions on how to do so. If you are not comfortable writing your own Python code, then just get in touch with us.