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
W i n t e r - S u m m e r 2 0 1 2 P a g e | 55
end of hole, 900 m, a massive dolomitic facies (C1) is logged. This facies locally contained
rare earth minerals but non continuity was observed.
The hole did not intersect the REE zone. Assays results reflect the low rare earth minerals
content. The coarse grained dolomitic facies (C2) returned a value of 0.539% TREO / 848m
(from 52m) including 0.014% HREO / 848m. The low grading transition zone, C2, may have
an economical interest depending on the economical context and the exploitation method
choose.
13.5.27 2012-REE-055
The 2012-REE-055 is situated on the North-West area of the REE zone (MTME 256087.07:
MTMN 5378531.73). It was drilled at 301° (true north) with a dip of -45°. The objective
was to intersect the West contact at depth for delimiting the REE zone. The overburden is
12.5m thick. From 12.5m to 57m, the Trenton limestone covered the carbonatite. A massive
dolomitic carbonatite facies (C1L) rich in rare earth minerals and strongly altered (hematite,
chlorite and siderite) is logged down to 99 m. From 99m to 159m, the same facies without
the alteration contained apatite stringer (5-8%) and disseminated pyrite (1-2%). From 159m
to 276m, log described a breccia facies with a rare earth minerals percentage of decreasing
and an increasing amount of syenite enclaves.
The 2012-REE-055 intercepted the west contact has plan. It returned an overall value of
1.747% TREO / 216m (from 57m) including 0.029% HREO / 216m. The main REE zone,
intercepted in the upper part of the hole returned a value of 1.900% TREO / 147m (from
57m) including 0.032% HREO / 147m.
13.5.28 2012-REE-056
The 2012-REE-056 is located on the North-West area of the REE zone (MTME 256087.47:
MTMN 5378531.53). The same set-up was used to drill the 2012-REE-055 and 2012-REE-
056. It was drilled at 301° (true north) with a dip of -75°. The objective was to intersect the
West contact at depth. The overburden is 9 m thick. From 9 m to 43.5 m, the Trenton
limestone covered the carbonatite. From 43.5m and down to 108m, a mineralized carbonatite
breccia facies (BRC1L) is logged. The sub- surface alteration (hematite, chlorite and
siderite) is observed. From 108 m to 147 m, the same facies is noted. The rare earth minerals
content decreased toward depth. There average proportion varied around 4%) and are
associated to disseminated pyrite clusters (1-2%). A calcitic facies (BRC1C) is logged from
147 m to 193.1 m. The same breccia facies, but no calcitic, is intersected down to 516 m.
The REEs minerals content seems to increase with the degree of breccia intensity. A light
decrease of REE is visible from 285 to 351 m. Other mineralisation are pyrite (1-2% in
disseminated cluster) and apatite (2-5% in stringer). From 516 m to 549.6 m, many syenite
enclaves (75%) are observed. This changed mark the contact between the REE zone and the
surrounding transition zone composed of massive dolomitic coarse grain carbonatite (C2).
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