Continental Curst Compositions: Rudnick, Gao, 2003

Rudnick, R. L., Gao, S. X. Composition of the continental crust, 2003 [ref]

component	units	upper	middle	lower	total
SiO2	wtp	66.6	63.5	53.4	60.6
TiO2	wtp	0.64	0.69	0.82	0.72
AI2O3	wtp	15.4	15	16.9	15.9
FeO	wtp	5.04	6.02	8.57	6.71
MnO	wtp	0.1	0.1	0.1	0.1
MgO	wtp	2.48	3.59	7.24	4.66
CaO	wtp	3.59	5.25	9.59	6.41
Na2O	wtp	3.27	3.39	2.65	3.07
K2O	wtp	2.8	2.3	0.61	1.81
P2O5	wtp	0.15	0.15	0.1	0.13
Li	ppm	24	12	13	16
Be	ppm	2.1	2.3	1.4	1.9
Sc	ppm	14	19	31	21.9
V	ppm	97	107	196	138
Cr	ppm	92	76	215	135
Co	ppm	17.3	22	38	26.6
Ni	ppm	47	33.5	88	59
Cu	ppm	28	26	26	27
Zn	ppm	67	69.5	78	72
Ga	ppm	17.5	17.5	13	16
Rb	ppm	82	65	11	49
Sr	ppm	320	282	348	320
Y	ppm	21	20	16	19
Zr	ppm	193	149	68	132
Nb	ppm	12	10	5	8
Cs	ppm	4.9	2.2	0.3	2
Ba	ppm	628	532	259	456
La	ppm	31	24	8	20
Ce	ppm	63	53	20	43
Pr	ppm	7.1	5.8	2.4	4.9
Nd	ppm	27	25	11	20
Sm	ppm	4.7	4.6	2.8	3.9
Eu	ppm	1	1.4	1.1	1.1
Gd	ppm	4	4	3.1	3.7
Tb	ppm	0.7	0.7	0.48	0.6
Dy	ppm	3.9	3.8	3.1	3.6
Ho	ppm	0.83	0.82	0.68	0.77
Er	ppm	2.3	2.3	1.9	2.1
Tm	ppm	0.3	0.32	0.24	0.28
Yb	ppm	2	2.2	1.5	1.9
Lu	ppm	0.31	0.4	0.25	0.3
Hf	ppm	5.3	4.4	1.9	3.7
Ta	ppm	0.9	0.6	0.6	0.7
Pb	ppm	17	15.2	4	11
Th	ppm	10.5	6.5	1.2	5.6
U	ppm	2.7	1.3	0.2	1.3