IS NOT TO BE USED FOR (AL2O3+MNO+TIO2+NA2O) IN CPX >5 W.
IS NOT TO BE USED FOR FE/(FE+MG+CA) IN CPX < 0.1
This sensor from TPF collection
| Article | Fonarev, V.I., Graphchikov, A.A. Two-pyroxene thermometry: a critical evaluation, 1991 [ref] |
|---|---|
| Callibration | |
| Precision | ±50-100 °C |
| Ranges | 600-900 °C |
| Renew sensors |
source("utilities_tpf.r");
sensors.t.cpx_opx_fonarev_graphchikov_1991_b <- function(Cpx, Opx, P, usePFU=FALSE, ...){
row_names <- paste0(Cpx$Name,"-", Opx$Name);
if(!usePFU){
Opx <- tpf.recalc_minaral("OPX",Opx);
Cpx <- tpf.recalc_minaral("CPX",Cpx);
}
X <- (Cpx$Fe_p2_pfu + Cpx$Fe_p3_pfu) / (Cpx$Mg_pfu + Cpx$Fe_p2_pfu + Cpx$Fe_p3_pfu + Cpx$Ca_pfu + Cpx$Mn_pfu + Cpx$Al_c6_pfu + Cpx$Ti_pfu + Cpx$K_pfu + Cpx$Na_pfu);
Y <- (Opx$Fe_p2_pfu + Opx$Fe_p3_pfu) / (Opx$Mg_pfu + Opx$Fe_p2_pfu + Opx$Fe_p3_pfu + Opx$Ca_pfu + Opx$Mn_pfu + Opx$Al_c6_pfu + Opx$Ti_pfu + Opx$K_pfu + Opx$Na_pfu);
Z <- Cpx$Al2O3_wtp + Cpx$TiO2_wtp + Cpx$MnO_wtp + Cpx$Na2O_wtp;
X2 <- (Cpx$Fe_p2_pfu + Cpx$Fe_p3_pfu) / (Cpx$Mg_pfu + Cpx$Fe_p2_pfu + Cpx$Fe_p3_pfu + Cpx$Ca_pfu);
Y2 <- (Opx$Fe_p2_pfu + Opx$Fe_p3_pfu) / (Opx$Mg_pfu + Opx$Fe_p2_pfu + Opx$Fe_p3_pfu + Opx$Ca_pfu);
OZ <- Opx$Al2O3_wtp + Opx$TiO2_wtp + Opx$MnO_wtp + Opx$Na2O_wtp;
X <- ifelse(Z<OZ,X2,X);
Y <- ifelse(Z<OZ,Y2,Y);
A <- 5.6066 * X + 13.6767 * X^2 - 23.6366 * X^3 - 60.7866 * X^4 - Y * (1 - (0.35 - X) * 0.01 * P);
B <- - 9.9203 * X - 25.1949 * X^2 + 30.5070 * X^3 + 148.9344 * X^4;
G <- 6.9830 * X + 10.0505 * X^2 - 9.1097 * X^3 - 85.1719 * X^4;
N <- (2 * G * 1000 / ( - B + sqrt(B^2 - 4 * A * G))) - 273.15;
T <- N;
A <- - 15.9135 * X + 112.8452 * X^2 - 232.7006 * X^3 + 156.3120 * X^4 - Y * (1 - (0.5 - X) * 0.01 * P);
B <- 44.2986 * X - 313.6564 * X^2 + 660.4657 * X^3 - 446.5655 * X^4;
G <- - 27.1202 * X + 212.7500 * X^2 - 462.5763 * X^3 + 316.4015 * X^4;
M <- (2 * G * 1000 / ( - B + sqrt(B^2 - 4 * A * G))) - 273.15;
T <- (M + N) / 2;
T <- ifelse(Z>5.0, T, NA);
T <- ifelse(X<0.1, T, NA);
T <- ifelse(T > 600 && T < 900, T, NA);
return(data.frame(Name=row_names,P=P,T_calc=T));
}
sensors.t.cpx_opx_fonarev_graphchikov_1991_b.args <- function(){
ars <- list();
ars$minerals <- c("Cpx", "Opx");
ars$ranges <- c("P");
return(ars);
}
#sensors.t.cpx_opx_fonarev_graphchikov_1991_b.test <- function(){
#
#}