Opx-Cpx: Brey, Kohler, 1990 <C>

ONLY FOR LHERZOLITES, EQ(9)

Details

This sensor from TPF collection

Article Brey, G. P., Kohler, T. Geothermobarometry in Four-phase Lherzolites II. New Thermobarometers, and Practical Assessment of Existing Thermobarometers, 1990 [ref]
Callibration
Precision ±15 °C
Ranges 2-60 kbar, 900-1400 °C
Renew sensors

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Source

source("utilities_tpf.r");

sensors.t.opx_cpx_brey_kohler_1990_c <- function(Opx, Cpx, P, usePFU=FALSE, ...){

    row_names = paste0(Opx$Name,"-",Cpx$Name);
    
    if(!usePFU) {
        Opx <- tpf.recalc_minaral("OPX",Opx);
        Cpx <- tpf.recalc_minaral("CPX",Cpx);
    }

    XFO <- (Opx$Fe_p2_pfu + Opx$Fe_p3_pfu) / (Opx$Fe_p2_pfu + Opx$Fe_p3_pfu + Opx$Mg_pfu);
    XFC <- (Cpx$Fe_p2_pfu + Cpx$Fe_p3_pfu) / (Cpx$Fe_p2_pfu + Cpx$Fe_p3_pfu + Cpx$Mg_pfu);
    CO <- Opx$Ca_pfu / (1 - Opx$Na_pfu);
    CC <- Cpx$Ca_pfu / (1 - Cpx$Na_pfu);
    KD <- (1 - CC) / (1 - CO);
    T <- (23664 + (24.9 + 126.3 * XFC) * P) / (13.38 + (log(KD))^2 + 11.59 * XFO) - 273.15;

    return(data.frame(Name=row_names, P=P, T_calc=T));
}

sensors.t.opx_cpx_brey_kohler_1990_c.args <- function(){
    ars <- list();
    ars$minerals <- c("Opx", "Cpx");
    ars$ranges <- c("P");
    return(ars);
}

#sensors.t.opx_cpx_brey_kohler_1990_c.test <- function(){
#
#}