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

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
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Figure 12: Mineralized carbonatite breccia facies (BRC1L).
The REE mineralisation presented no relationship with the different facies of the core REE
zone. Several analyses cumulate during the 2011 and 2012 drilling program show the
homogeneity of the mineralization inside the ferrocarbonatite (C1) envelope. The low grade
zone, are localized in the periphery and correspond to the transition zone. In this zone, the
REE mineralisation is still in the C1 facies. The amount of mineralized C1 intruding the
adjacent lithology (C2, C3, C5 and S1) decreased going outward from the center.
Item 12. EXPLORATION
Exploration and resource development drilling is concentrated within the carbonatite complex
where the economic concentration of niobium is known. Since 1985, no exploration works
for REE have been done until the drilling campaign started by IAMGOLD in 2011 and
continues through 2012.
12.1 Scoping Study
Exploration program focused on the REE zone. The drilling program has continuously
progressed. The delimitation program, initiated in 2011, ended in May 4 th 2012 by the
completion of the hole 2012-REE-039. A total of 10 holes were added in 2012 to the initial
28 holes performed in 2011, including two deep holes (2012-REE-033and 2012-REE-034),
for a total of 22, 072 linear metres.
12.2 Prefeasibility study
Since May 5th, 10 other holes have been added to define the REE zone over a 100 x 100
metres drilling grid through the depth of 400 metres and a 100x200 metres drilling grid
through the depth of 700 metres. The additional 15, 779 linear metres drilled between May to
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