Grt-Opx: Powell, 1978

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source("utilities_tpf.r");
 
sensors.t.grt_opx_powell_1978 <- function(Grt, Opx, P, ...){
    Opx <- tpf.recalc_minaral("OPX",Opx);
    Grt <- tpf.recalc_minaral("GRT",Grt);
 
    C <- Opx$Ca_pfu;
    M <- (1 - Opx$Ca_pfu - Opx$Na_pfu) / (1 + (Opx$Fe_p2_pfu + Opx$Fe_p3_pfu) / Opx$Mg_pfu);
    N <- 1 - Opx$Ca_pfu - Opx$Na_pfu;
    X <- Grt$Mg_pfu / 3;
    Y <- Grt$Ca_pfu / 3;
    F <- N - M;
    K <- X / Y * C / M;
    T <- (7500 + 63 * P - (2870 + 50 * P) * (X - Y) - 1900 * F) / (4.58 - log(K) - 2.16 * (X - Y)) - 273;
    return(data.frame(Name=paste0(Grt$Name,"-", Opx$Name),P=P,T_calc=T));
}
 
sensors.t.grt_opx_powell_1978.args <- function(){
    ars <- list();
    ars$minerals <- c("Grt", "Opx");
    ars$ranges <- c("P");
    return(ars);
}
 
#sensors.t.grt_opx_powell_1978.test <- function(){
#
#}