Harker's diagramm SiO2 - CaO. Nomolized by oxides sum.
| Reference | Harker, Alfred The natural history of igneous rocks, 1909 [ref] |
| Data | bulk |
| Input | Na2O_wtp, MgO_wtp, Al2O3_wtp, SiO2_wtp, P2O5_wtp, K2O_wtp, CaO_wtp, TiO2_wtp, MnO_wtp, Fe2O3_wtp |
classifydiag.harker_si_ca <- function (wtp_data, ...)
{
ds <- selectNames(wtp_data, c('Name','Na2O_wtp', 'MgO_wtp', 'Al2O3_wtp',
'SiO2_wtp', 'P2O5_wtp', 'K2O_wtp', 'CaO_wtp',
'TiO2_wtp', 'MnO_wtp', 'Fe2O3_wtp'));
norm_sum <- rowSums(ds[,c('Na2O_wtp', 'MgO_wtp', 'Al2O3_wtp',
'SiO2_wtp', 'P2O5_wtp', 'K2O_wtp', 'CaO_wtp',
'TiO2_wtp', 'MnO_wtp', 'Fe2O3_wtp')]);
pts <- data.frame(Name = ds$Name,
X = ds$SiO2_wtp*100/norm_sum,
Y = ds$CaO_wtp*100/norm_sum);
labels <- c("SiO2", "CaO");
ret <- c();
ret$type <- "diagram";
ret$points <- pts;
ret$labels <- labels;
ret$limits <- c(45,85,0,10);
return(ret);
}