Y-Cr: Petrotectonic Environments, Pearce

Discrimination diagram for characterizing island-arc tholeiiters on the basis of Y-Cr covariations.

<data plot> Reference [wiki]: Pearce, Julian A Trace element characteristics of lavas from destructive plate boundaries, 1982 [ref] Data: bulk Input: Cr_ppm, Y_ppm </data>

require('ggplot');
 
classifydiag.basalts_cr_y_pearce <- function (wtp_data, ...)
{  
ds <- selectNames(wtp_data,c('Name','Cr_ppm','Y_ppm'))
 
pts <- data.frame(Name=ds$Name,
                  X = ds$Y_gpt,
                  Y = ds$Cr_gpt);
 
labels <- c("Y gpt", "Cr gpt");
 
ret <- c();
ret$type <- "diagram";
ret$points <- pts;
ret$labels  <- labels;
ret$limits <- c(1,250,10,2000);
ret$scale <- c('log','log');
 
return(ret);
}