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 | 102 Figure 27: Histogram of 777 Density Measures. 19.1.4 Block Model The REE2012 block model was built within the GD_TR_2012 database, Gems 6.3.1 software. The estimated mineral resources have been modeled using a 10-metre cubic block model and grades were estimated using Ordinary Kriging (OK) over 5 metres equal length composites. The block model parametres are summarized in Table 21. Table 21: REE zone block model parametres (Exploration metres). Easting Northing Elevation Minimum coordinates 2,000 5,00 8,600 Maximum coordinates 3,200 6,400 10,100 Block size 10 10 10 Number of blocks 120 140 150 Rotation 0 0 0 References: Exploration Grid; Unit: metres The domain coding (rock type model) was based on the various wireframe constraints (Table 22). Each block was given a rock type attribute following a rule of precedence. All blocks were first selected and given the rock type 0 (air). Then, all blocks between the topographic surface and the overburden surface were given the rock type 1 (overburden). The rock type 2 (Trenton limestone) was attributed to all blocks between the overburden surface and the Trenton limestone surface. Finally, the Saint-Honoré carbonatite complex was divided in 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 | 103 domain based on the vertical interpolation of the compilation surface map (Figure 5). All blocs under the Trenton limestone surface were given the rock type number associated to their domain (Table 22). Table 22: Block model coding. Type Name Description Block Model Code Topography Topo Topography based on header altitude. 0 “air” (above the surface) <strong>Surface</strong> OB Overburden 1 (above the surface) <strong>Surface</strong> Trenton Base of the Trenton limestone 2 (above the surface) Geology C1 REE mineralized dolomite 10 Geology C2 Massive dolomite 20 Geology C3 Nb mineralized, foliated dolomite or calcitite 30 Geology C5 Nb mineralized, coarse grained dolomite 50 Geology C6 Pyroxene bearing calcitite 60 Geology S1 Syenite 110 Within the block model project, a series of models were incorporated for recording the different attributes assigned and calculated in the block model development. These attributes are listed in Table 23 below. Table 23: Block model attributes. Attribute Description and Unit Update or creation Default value Mapping Data type name Content procedure Rock type Geologic code 0 =Air 1=Overburden 2=Trenton limestone Limited by surfaces 50% over topo 50% over OB 99% over Trenton 10=C1 C1 domain - 20=C2 C2 domain 0 Rock type Integer 30=C3 50=C5 60=C6 110=S1 C3 domain C5 domain C6 domain S1 domain Density Density value from actual data Air=0 t/m 3 Updated from the rock code Overburden=1.8 profile. 2.86 Density Single Trenton=2.78 Carbonatite=2.86 TREO_PCT TREO grade % Interpolation, ordinary kriging 0 TREO Single CAT Resource classification 1=Measured 2=Indicated 3=Inferred 4=Mineral inventory - Based on the search ellipse and limited by depth with the drill hole mesh coverage. 0 CAT Integer 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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. 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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