NI 43-101 Technical report, Surface diamond drilling ... - Iamgold

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Table 10: Elements analyzed by ICM 90A.
Element
Reporting
Limit
(ppm)
Upper
Limit
Element
Reporting
Limit
(ppm)
Upper
Limit
Element
Reporting
Limit
(ppm)
Upper
limit
Element
Reporting
Limit
(ppm)
Upper
Limit
Ag 1.00 0.01% Er 0.05 0.10% Mn 10 10% Tb 0.05 0.10%
Al 0.01(%) 25% Eu 0.05 0.10% Mo 2.00 1.0% Th 0.10 0.10%
As 5.00 10% Fe 0.01(%) 30% Nb 1.00 1.0% Ti 0.01(%) 25%
Ba 0.50 1.0% Ga 1.00 0.10% Nd 0.10 1.0% TI 0.50 0.10%
Be 5.00 0.25% Gd 0.05 0.10% Ni 5.00 1.0% Tm 0.05 0.10%
Bi 0.10 0.10% Ge 1.00 0.10% P 0.01(%) 25% Ta 0.50 1.0%
Ca 0.01(%) 35% Hf 1.00 1.0% Pb 5.00 1.0% U 0.05 0.1%
Cd 0.20 1.0% Ho 0.05 0.10% Pr 0.05 0.1% V 5.00 1.0%
Ce 0.10 1.0% In 0.20 0.10% Rb 0.20 1.0% W 1.00 1.0%
Co 0.50 1.0% K 0.01(%) 25% Sb 0.50 1.0% Y 0.50 0.1%
Cr 10 10% La 0.10 1.0% Sc 5.00 5.0% Yb 0.10 0.1%
Cs 0.10 1.0% Li 10 5.0% Sm 0.10 0.1% Zn 5.00 1.0%
Cu 5.00 1.0% Lu 0.05 0.10% Sn 1.00 1.0% Zr 0.50 1.0%
Dy 0.05 0.1% Mg 0.01(%) 30% Sr 0.10 1.0%
15.2.2 ICPMS
ICPMS diluted samples to be analyzed on Elan 9000 for 90A samples and Nexion for
91B packages.
Working Calibration solutions and 2 nd source calibration check solution was prepared for
each analysis run. Re-calibration was done before the analysis of each tray. Additional
fusion QC was analyzed every other tray in addition to the QC on each tray.
REE interference corrections were evaluated and corrected.
15.2.3 ICP/OES
Samples are analyzed with a minimum of 10 certified reference materials for the required
analyses, all prepared by sodium peroxide fusion. Every 10 th sample is prepared and
analyzed in duplicate; a blank is prepared every 30 samples and analyzed. Samples are
analyzed using a Varian 735ES ICP or a Thermo 6500 ICAP and the method of internal
standardization.
For High concentration of REE, the IMS91B analysis technic was used.
Crushed and pulverized rock, samples (0.20 gr) are fused by Sodium peroxide in glassy
carbon crucibles in a muffle furnace and dissolved using diluted HNO3. The fused
solution sample is aspirated into the Inductively Coupled Plasma Dynamic Reaction Cell
Mass Spectrometre (ICP-DRC-MS). Samples are analyzed against known calibration
materials to provide quantitative analysis of the original sample.
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