Table 3.

Factor loading of elemental data.

Variables	Factor-1	Factor-2	Factor- 3
SiO2	0.256897	0.126844	−0.731877
Al2O3	−0.268324	−0.687692	0.047629
CaO	−0.488043	0.265709	−0.591899
Fe2O3	0.973803	−0.076487	−0.041148
K2O	0.105203	−0.944050	−0.092252
TiO2	0.336556	0.709427	0.185842
Cu	0.908103	0.203992	0.078597
Zn	0.372214	0.246369	0.766395
Pb	−0.013515	−0.164244	−0.818901
La	0.768064	0.463166	0.388711
Co	0.986833	0.021926	0.009225
V	0.658077	−0.370650	−0.145478
Cd	0.222314	−0.919210	0.073314
Cr	0.834465	0.353688	0.270792
% of variance explained	40.79	23.07	14.80