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Home All issues Volume 192 (2021) BSGF - Earth Sci. Bull., 192 (2021) 33 Full HTML

Table 1

Major and trace element compositions of granitic rocks from the Puy-les-Vignes deposit.

Lithology Microgranite Microgranite Granitic clast Granitic clast Rare-metal granite Rare-metal granite
Alteration Weak Strong Strong Strong Weak Weak
Sample PV-92-7 PV-92-5 PLV-13-02 PLV-02-10 PLV-02-02a PLV-02-02b
SiO2 (wt.%) 77.94 75.19 78.63 73.34 72.43 70.77
TiO2 < LD 0.06 0.06 0.43 0.02 0.05
Al2O3 13.94 14.05 13.49 15.05 16.94 17.19
Fe2O3 0.49 2.95 2.03 3.67 0.30 1.18
MnO 0.00 0.00 0.00 0.01 0.06 0.19
MgO 0.18 0.25 0.19 0.51 < LD 0.09
CaO 0.24 0.19 < LD < LD 0.26 0.54
Na2O 3.59 0.16 0.17 0.18 8.15 4.58
K2O 2.48 4.30 3.90 4.33 0.97 3.09
P2O5 0.14 0.16 < LD < LD 0.42 0.54
LOI 1.30 3.51 2.58 3.07 0.93 1.82
Total 100.3 100.8 101.1 100.6 100.5 100.1
 
Be (ppm) 3.5 5.5 2.4 3.2 113.0 74.3
Sc < LD 3.2 6.7 10.9 < LD < LD
V 2.8 3.3 5.0 39.4 < LD 0.9
Cr < LD < LD < LD 30.2 5.1 6.0
Co 2.5 11.2 < LD 0.9 < LD 0.6
Ni < LD 10.6 < LD < LD < LD < LD
Cu < LD 246 71.5 301 12.3 18.7
Zn < LD 27.3 < LD 26.1 58.8 212
Ga 16.5 21.1 22.7 31.3 29.6 43.0
Ge 3.0 3.0 3.2 2.5 4.2 4.2
As 266 3540 2275 2235 9.0 20.7
Rb 156 263 218 261 329 1151
Sr 95.2 13.3 13.7 17.6 23.1 25.0
Y 6.0 9.9 6.6 28.0 1.0 2.2
Zr 22.1 23.9 16.4 96.5 13.2 14.7
Nb 4.8 6.2 11.3 9.9 64.9 68.7
Mo < LD < LD < LD < LD < LD < LD
Cd < LD < LD < LD < LD 0.1 0.3
In < LD < LD < LD < LD < LD < LD
Sn 40.6 98.1 56.3 89.3 3044 1853
Sb 0.5 1.3 0.9 1.6 0.5 0.6
Cs 6.7 12.0 8.0 11.3 57.8 170
Ba 195 285 409 911 9.2 17.2
La 1.7 4.7 2.4 26.6 0.7 1.2
Ce 3.3 8.9 5.3 50.9 1.0 2.0
Pr 0.4 1.1 0.7 6.2 0.2 0.3
Nd 1.5 3.9 3.0 23.4 0.9 1.1
Sm 0.4 1.0 1.0 4.8 0.2 0.3
Eu 0.3 0.3 0.2 0.7 0.0 0.1
Gd 0.5 1.0 1.0 4.4 0.3 0.4
Tb 0.1 0.2 0.2 0.7 0.0 0.1
Dy 0.9 1.6 1.4 4.7 0.3 0.5
Ho 0.2 0.3 0.3 1.0 0.0 0.1
Er 0.6 1.0 0.8 2.8 0.1 0.2
Tm 0.1 0.2 0.1 0.4 0.0 0.0
Yb 0.8 1.3 0.9 2.8 0.1 0.3
Lu 0.1 0.2 0.1 0.4 0.0 0.0
Hf 0.9 0.9 0.9 2.8 1.0 1.2
Ta 1.9 2.0 4.5 1.6 46.0 47.5
W 9.7 29.7 40.4 97.2 14.4 37.2
Pb 5.8 41.0 10.2 12.7 11.3 8.7
Bi 2.2 34.2 26.8 27.9 1.5 5.9
Th 0.5 1.7 1.2 9.6 2.2 1.5
U 1.0 1.9 1.7 3.2 3.0 3.6
REE 11.0 25.6 17.4 130.0 4.0 6.5
Eu/Eu* 1.66 0.87 0.68 0.44 0.55 0.64
Ce/Ce* 0.94 0.96 0.95 0.96 0.62 0.81
Nb/Ta 2.54 3.15 2.50 6.16 1.41 1.45
Zr/Hf 24.59 25.80 19.12 34.01 13.23 12.67
La/Yb 1.38 2.43 1.74 6.36 3.62 2.89

< LD: below limit of detection.

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