The Composition of the Continental Crust

R & F T & M R & F T & M Li 11 13 Ba 390 250 Be 1.5 La 18 16 B 10 Ce 42 33 Sc 22 30 Pr 5 3.9 V 151 230 Nd 20 16 Cr 119 185 Sm 3.9 3.5 Co 25 29 Eu 1.2 1.1 Ni 51 105 Gd 3.6 3.3 Cu 24 75 Tb 0.56 0.6 Zn 73 80 Dy 3.5 3.7 Ga 16 18 Ho 0.76 0.78 Ge 1.6 Er 2.2 2.2 As 1 Tm 0.32 Se 0.05 Yb 2 2.2 Rb 58 32 Lu 0.33 0.3 Sr 325 260 Hf 3.7 3 Y 20 20 Ta 1.1 1 Zr 123 100 W 1 Nb 12 11 Re, ppb 0.4 Mo 1 Os, ppb 0.005 Pd, ppb 1 Ir, ppb 0.1 Ag, ppb 80 Au, ppb 3 Cd, ppb 98 Tl, ppb 360 In, ppb 50 Pb 12.6 8 Sn 2.5 Bi, ppb 60 Sb 0.2 Th 5.6 3.5 Cs 2.6 1 U 1.42 0.91 MAJOR OXIDES (weight percent) R & F T & M SiO2 59.1 57.3 TiO2 0.7 0.9 Al2O3 15.8 15.9 FeO 6.6 9.1 MnO 0.1 0.18 MgO 4.4 5.3 CaO 6.4 7.4 Na2O 3.2 3.1 K2O 1.88 1.1 P2O5 0.2

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