IS NOT TO BE USED FOR (AL2O3+TIO2+MNO+NA2O) IN CPX >5 W.
IS NOT TO BE USED FOR P>20 KBAR
This sensor from TPF collection
| Article | Fonarev V.I., Graphchikov A.A. Two-pyroxene geo-thermometer Mineral. zhurnal, v. 4, N 5, p. 3-12, 1982. (in Russian) |
|---|---|
| Callibration | |
| Precision | |
| Ranges | 600-820 °C |
| Renew sensors |
source("utilities_tpf.r");
sensors.t.cpx_opx_fonarev_graphchikov_1982 <- 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);
Y <- (Opx$Fe_p2_pfu + Opx$Fe_p3_pfu) / (Opx$Mg_pfu + Opx$Fe_p2_pfu + Opx$Fe_p3_pfu + Opx$Ca_pfu);
Z <- Cpx$Al2O3_wtp + Cpx$TiO2_wtp + Cpx$MnO_wtp + Cpx$Na2O_wtp;
A <- 1.9943 * X + 19.2401 * X^2 - 63.0069 * X^3 + 16.7365 * X^4 - Y * (1 + 0.000673813 * P);
B <- - 0.2018 * X - 75.909 * X^2 + 245.2007 * X^3 - 141.3534 * X^4;
G <- 0.3893 * X + 61.3861 * X^2 - 205.0557 * X^3 + 147.2069 * X^4;
T <- (2 * G * 1000 / ( - B + sqrt(B^2 - 4 * A * G))) - 273.15;
T<-ifelse(T>820,T,'T too high');
T<-ifelse(T<600,T,'T too low');
T<-ifelse(Z>5.0,T,'Composition out of bounds');
T<-ifelse(X<0.1,T,'Composition out of bounds');
T<-ifelse(P<20,T,'P too high');
return(data.frame(Name=row_names,P=P,T_calc=T));
}
sensors.t.cpx_opx_fonarev_graphchikov_1982.args <- function(){
ars <- list();
ars$minerals <- c("Cpx", "Opx");
ars$ranges <- c("P");
return(ars);
}
#sensors.t.cpx_opx_fonarev_graphchikov_1982.test <- function(){
#
#}