====== Cpx-Opx: Kretz, 1982 <B> ======

Based on temperature dependence of the Mg-Fe distribution.
 
=== Details ===

<WRAP center round info 60%>
This sensor from [[:about_tpf|TPF]] collection
</WRAP>

^ Article | <ref:kretz1982> |
^ Callibration | Experimetal and data from Skaergaard and Bushveld |
^ Precision | ±60°C |
^ Ranges | 750-1400 °C |
^ See also | [[sensors:t:cpx_opx_kretz_1982_a|Kretz, 1982 <A>]] |

<use:sensors.t.cpx_opx_kretz_1982_b>
<test:sensors.t.cpx_opx_kretz_1982_b>

<WRAP center round todo 60%>
  * <del>заголовок</del>
  * <del>краткое описание</del>
  * <del>статья</del>
  * <del>ссылка</del>
  * <del>карточка</del>
  * подробное описание
  * <del>код</del>
  * тест
</WRAP>

=== Source ===
<Code linenums lang-r>
source("utilities_tpf.r");

sensors.t.cpx_opx_kretz_1982_b <- function(Cpx, Opx, usePFU = FALSE, ...){
    
    row_names = paste0(Cpx$Name,"-",Opx$Name);

    if(!usePFU) { 
        Cpx <- tpf.recalc_minaral("CPX",Cpx);    
        Opx <- tpf.recalc_minaral("OPX",Opx);
    }

    X <- Cpx$Fe_p2_pfu / (Cpx$Fe_p2_pfu + Cpx$Mg_pfu);
    Y <- Opx$Fe_p2_pfu / (Opx$Fe_p2_pfu + Opx$Mg_pfu);
    
    T <- 1130 / (log(Y / (1 - Y) * (1 - X) / X) + 0.505) - 273.15;

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

sensors.t.cpx_opx_kretz_1982_b.args <- function(){
    ars <- list();
    ars$minerals <- c("Cpx", "Opx");
    ars$ranges <- c();
    return(ars);
}

#sensors.t.cpx_opx_kretz_1982_b.test <- function(){
#    sensors.t.cpx_opx_kretz_1982_b(data.frame(Name=c('Test'), FeO_wtp=c(10), MgO_wtp=c(10)));
#}
</Code>

{{tag> tpf Cpx Opx AP_igroup fixed}}