cerUB tutorial
1 Installing cerUB
2 Initial procedures
3 Protocol 1 - Geochemical data
4 Protocol 2 - Petrographic data
5 Protocol 3 - Geochemical and petrographic data
6 Protocol 4 - Provenance data
7 Protocol 4 - Provenance data with shipwrecks
8 Interpreting biplots

2.9 Choose geochemical data

chemVars16 <- c("Fe2O3","Al2O3","TiO2","MgO","CaO","SiO2",
                "Th","Nb","Zr","Y","Ce","Ga","V","Zn","Ni","Cr")