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

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R a r e E a r t h E l e m e n t E x p l o r a t i o n P r o g r a m M a r c h - 2 0 1 3 W i n t e r - S u m m e r 2 0 1 2 P a g e | 100 • Calculate and model the major, semi-major and minor axes of continuity. The anisotropy direction was determined using the regressions rules in “SAGE” software. The variogram was modeled with a nugget effect and two structures representing the larger scale spatial variability of the datasets. The modeled correlogram is summarized in Table 20. The rotation angles use the Gemcom convention around the ZYZ axes based on the orientation of the block model. The set of rules would be the same for all REO as for TREO except the limits on grade for the Top Cut Value and the Cut-Over High Grade Value would have to be adjusted accordingly. Table 20: Variography statistics Ranges (m) Rotation (°) Element Nugget effect 1 st Structure 2 nd Structure Z X Z X:50 X:750 TREO (%) 0.422 Y:150 Y:360 Z:360 Z:700 0 0 0 Sill:0.431 Sill:0.147 19.1.2 Domain and Volume The REE Zone mineral resources model is limited to the core of the Saint-Honoré carbonatite complex. The C1 rock type is (the REEs mineralized carbonatite) containing the majority of the mineralization but a surrounding crown, called the transition zone, included the low grade values. The transition zone is formed of mineralized C1 injected in the C2 (massive carbonatite) and the S1 (syenite). The geological model outlying the REE host rock was drawn in 2011. A vertical projection was drawn from the surface compilation map (Figure 5) using a 70° dip cone shape truncated first at 1000m depth in 2011 and extend at 1400m depth in 2012 (Figure 26). The volume is adjusted to the drill hole rock type description and assay values to obtain a 3D cone shape confining the grade interpolation process. The geological model will be reviewed in 2013 with all the new data collected by drilling in 2012. The core zone and the transition zone will be separated for a better definition of the resource. However the geological model is not up to date, the 2011 model is judged enough close to the reality to use it for generating a valid resource interpolation. 3400, chemin du Columbium, St-Honoré-de-Chicoutimi, QC G0V 1L0 Canada – tel. : 418 673-4694 Fax : 418 673-3179 E-mail : info.niobec@iamgold.com www.niobec.com
R a r e E a r t h E l e m e n t E x p l o r a t i o n P r o g r a m M a r c h - 2 0 1 3 W i n t e r - S u m m e r 2 0 1 2 P a g e | 101 Figure 26: 3D Shape of REE Zone (left) and Niobec mine (right) C4 C5 C2 C1 S1 C3 C5 Mine C9 C6 Niobec Mine REE ZONE 19.1.3 Specific Gravity (SG) A systematic specific gravity measurement was realized during the 2012 drilling campaign. The density test was realized by Niobec staff using the water immersion technique on representative core sample of ±15cm long. Each corresponding 3 metres long sample sent for analysis was also analyzed by SGS using an air pycnometre on pulverized samples. Both technic returned similar SG values, the SGS values were choose to be including in the database. The density is now available not only for every different geological interval described but also on a 30 metres frequency along each hole. Coupled with the 2011 values, 777 density measurements, mainly located in the C1, were used for the interpolation (Figure 27). Even if the new sample average density is 3.11 t/m 3 , the 2011 density value of 2.86 t/m 3 was used has default value for the blocks with insufficient data during the interpolation process. 3400, chemin du Columbium, St-Honoré-de-Chicoutimi, QC G0V 1L0 Canada – tel. : 418 673-4694 Fax : 418 673-3179 E-mail : info.niobec@iamgold.com www.niobec.com
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Page 137 and 138: Legend TREO (pct) 0.000 0.250 0.250
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Liste des figures Figure 1 : Hélic
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. 3.3. Spécifications de vol 3.3.1
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. 4. Équipements utilisés 4.1. H
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. Système de navigation : Ag-Nav L
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. 6. Personnel Le personnel d’EON
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. 8. Traitement des données L’ob
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. données en profil, où les donn
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. 9. Produits finaux 9.1. Particula
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11. Annexe A - Résultats des tests
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. EON Geosciences Inc. FOM Test: MA
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. 12. Annexe B - Description des ch
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IAMGOLD Corporation Page 158 Levé
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. EON GEOSCIENCES INC Daily report
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NI 43-101 Technical report, Surface diamond drilling ... - Iamgold

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