Cpx slope of the solvus surface based on Natural data for associated Ca pyroxene (Cpx) and orthopyroxene (Opx) or pigeonite are combined with experimental data for Fe-free pyroxenes.
This sensor from TPF collection
| Article | Kretz, Ralph Transfer and exchange equilibria in a portion of the pyroxene quadrilateral as deduced from natural and experimental data, 1982 [ref] |
|---|---|
| Callibration | Experimetal and data from Skaergaard and Bushveld |
| Precision | ±60°C |
| Ranges | 750-1400 °C |
| See also | Kretz, 1982 <B> |
source("utilities_tpf.r");
sensors.t.cpx_opx_kretz_1982_a <- function(Cpx, usePFU = FALSE, ...){
row_names = Cpx$Name;
if(!usePFU) Cpx <- tpf.recalc_minaral("CPX",Cpx);
X <- Cpx$Fe_p2_pfu / (Cpx$Fe_p2_pfu + Cpx$Mg_pfu);
Y <- Cpx$Ca_pfu / (Cpx$Ca_pfu + Cpx$Mg_pfu + Cpx$Fe_p2_pfu);
TH <- (1000 / (0.468 + 0.246 * X - 0.123 * log(1 - 2 * Y))) - 273.15;
TL <- (1000 / (0.054 + 0.608 * X - 0.304 * log(1 - 2 * Y))) - 273.15;
Ts <- data.frame(TH = TH, TL = TL, T = rep(NA, nrow(Cpx)));
Ts$T <- ifelse(Ts$TH>1080.0,Ts$TH,ifelse(Ts$TL<1080.0,TL,NA));
return(data.frame(Name=row_names,T_calc=Ts$T));
}
sensors.t.cpx_opx_kretz_1982_a.args <- function(){
ars <- list();
ars$minerals <- c("Cpx");
ars$ranges <- c();
return(ars);
}
#sensors.t.cpx_opx_kretz_1982_a.test <- function(){
#
#}