PROGRAMA GEOLOGIA DO BRASIL Contrato CPRM- UFPA Nº

diretamente em seus mais baixos valores de Or-normativo quando comparados as demais
amostras de composições modais granodioríticas.
Tabela 3.12: Análises químicas para rochas do Granodiorito Rio Maria da Folha Marajoara.
Amostra MAR-20A MAR-92A MAR-54A F-09A 92-20 F-66D MAR-145 F-10 92-23 F-66A 92-24 F-72 MAR-137 MAR-86A Média
SiO2 58.21 59.2 60.02 62.03 63.03 63.33 64.04 64.39 64.5 66.29 67.15 68.48 70.42 72.58 64.55
TiO2 0.59 0.62 0.59 0.52 0.44 0.46 0.42 0.43 0.43 0.36 0.4 0.32 0.27 0.19 0.43
Al2O3 17 16.54 16.57 16.15 15.11 14.3 14.99 14.77 15.5 14.03 16.07 15.11 14.21 13.85 15.30
Fe2O3
FeO
7.07 6.82 6.15 6.28 5.44 5.73 4.6 5.29 3.97 4.61 3.08 2.96 2.8 1.76 4.75
MgO 2.95 3.23 3.08 2.68 3.5 3.79 2.99 2.39 2.22 2.64 0.96 0.88 1.13 0.75 2.37
CaO 5.57 5.76 5.64 5.35 4.62 4.59 4.06 3.97 3.12 3.69 2.72 2.88 2.34 1.85 4.01
Na2O 4.69 4.25 4.32 3.9 4.04 3.54 3.99 4.15 4.66 3.78 5.34 4.62 3.59 3.86 4.20
K2O 1.88 1.6 1.82 2.16 2.97 3.28 3.05 2.94 2.87 3.28 2.27 2.9 4.05 4.26 2.81
P2O5 0.21 0.23 0.2 0.24 0.2 0.28 0.16 0.25 0.19 0.24 0.17 0.22 0.09 0.07 0.20
MnO
PF
0.08
1.6
0.09
1.4
0.07
1.4
0.07 0.08 0.07 0.06
1.3
0.06 0.06 0.06 0.03 0.02 0.05
1
0.04
0.8
0.06
1.25
Total 99.85 99.74 99.86 99.38 99.43 99.37 99.66 98.64 97.52 98.98 98.19 98.39 99.95 100.01 99.21
Cr 47.89 47.89 54.74 135 102.63 132 12.4 20.53 20.53 63.73
Ni 19.2 19.8 23.4 27.7 11.2 10.4 18.62
Co 40.1 37.9 33.1 44.4 43.1 26.2 37.47
Sc 14 14 12 10 5 4 9.83
V 118 117 85 73 44 14 75.17
Cu 147.2 37.1 57.2 26.7 23.3 36.2 54.62
Pb 2.7 2.4 4.5 4.7 7 17.6 6.48
Zn 44 43 36 34 35 40 38.67
Cd 0.2