Description
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AMIS0656 Li 2.94% Ta 187ppm Sn 573ppm Pegmatite Brazil
Origin of Material
Materials made using ore sourced from the Volta Grande mine was provided by AMG Mineração S.A. (“MIBRA”),a subsidiary of AMG Advanced Metallurgical Group N.V. It is from the Volta Grande tantalum, niobium, and tin mine (“Volta Grande”) in Minas Gerais state, Brazil. AMG Mineração produces Spodumene Concentrate, Tanttalum Concentrate, Tin in ingots, Feldspar and Abite. The sample of spodumene concentrate was produced by flotation, after magnetic separation. The milled pegmatite was processed in a magnetic separator, to remove iron minerals, mainly silicates. The non magnetic pegmatite was floated (rougher, cleaner and recleaner).
Approximate Mineral and Chemical Composition
The Volta Grande pegmatites occur in the Archaean Barbacena greenstone belt on the Southern border of the São Francisco craton. The Volta Grande pegmatites form six sub-horizontal tabular bodies characterized by coarse to very coarse-grained spodumene, quartz, albite, microcline and muscovite. The predominant lithium mineral is spodumene.
Recommended Concentrations and Limits
(at two Standard Deviations)
Certified Concentrations
Analyte Method Certified (µ)6 (2s)8 ± Unit
Li 4A_MICP1 2.94 0.29 %
Li FUS2 3.07 0.32 %
Ta 4A_MICP 187 35 ppm
Ta FUS 179 26 ppm
Nb 4A_MICP 26 5 ppm
Nb FUS 26 5 ppm
As 4A_MICP 2 1 ppm
Sb 4A_MICP 4 0.6 ppm
Sb FUS 5 2 ppm
Sn FUS 573 44 ppm
F SIE3 1153 182 ppm
S 4A_MICP 0.019 0.003 %
SG SG4 3.15 0.22 Dimensionless
Ba 4A_MICP 17 2 ppm
Be 4A_MICP 273 45 ppm
Bi 4A_MICP 2 0.5 ppm
Co 4A_MICP 3 0.5 ppm
Cs 4A_MICP 86 23 ppm
Cu 4A_MICP 25 6 ppm
Ga 4A_MICP 140 9 ppm
Hf 4A_MICP 7 2 ppm
K 4A_MICP 3262 326 ppm
Lu 4A_MICP 0.03 0.03 ppm
Mn 4A_MICP 1006 102 ppm
Mn FUS 1043 85 ppm
Mo 4A_MICP 1 0.1 ppm
Na 4A_MICP 3879 246 ppm
Ni 4A_MICP 16 5 ppm
P 4A_MICP 1427 189 ppm
Pb 4A_MICP 24 4 ppm
Sc 4A_MICP 0.7 0.4 ppm
Si FUS 29.72 1.1 %
Ti 4A_MICP 305 20 ppm
Tl 4A_MICP 7 0.7 ppm
V 4A_MICP 8 0.9 ppm
W 4A_MICP 1 0.4 ppm
Yb 4A_MICP 0.3 0.2 ppm
Zn 4A_MICP 58 6 ppm
Zr 4A_MICP 32 8 ppm
Recommended Concentrations and Limits
(at two Standard Deviations)
Certified Concentrations
|
Analyte |
Method |
Certified (µ)6 |
(2s)8 ± |
Unit |
|
|
Li |
4A_MICP1 |
2.94 |
0.29 |
% |
|
|
Li |
FUS2 |
3.07 |
0.32 |
% |
|
|
Ta |
4A_MICP |
187 |
35 |
ppm |
|
|
Ta |
FUS |
179 |
26 |
ppm |
|
|
Nb |
4A_MICP |
26 |
5 |
ppm |
|
|
Nb |
FUS |
26 |
5 |
ppm |
|
|
As |
4A_MICP |
2 |
1 |
ppm |
|
|
Sb |
4A_MICP |
4 |
0.6 |
ppm |
|
|
Sb |
FUS |
5 |
2 |
ppm |
|
|
Sn |
FUS |
573 |
44 |
ppm |
|
|
F |
SIE3 |
1153 |
182 |
ppm |
|
|
S |
4A_MICP |
0.019 |
0.003 |
% |
|
|
SG |
SG4 |
3.15 |
0.22 |
Dimensionless |
|
|
Ba |
Additional information
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