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 | 56
The REE zone returned an excellent value of 2.242% TREO / 475.5m (from 43.5m)
including 0.033% HREO / 475.5m. The small interval drilled in the transition returned also
a good value of 1.297% TREO / 30m (from 519m).
13.5.29 2012-REE-057
The 2012-REE-057 is located on the South-East area of the REE zone (MTME 256359.05:
MTMN 5378016.91). It was drilled at 031° (true north) with a dip of -50°. The objectives
were to intersect the South contact at depth and delimit the REE zone. The overburden is
12.7 m thick. From 12.7 m to 41.6 m, the Trenton limestone covered the carbonatite. A
massive textured, coarse grained carbonatite (C2), poor in Lanthanide is mainly logged down
to the end of hole, 643.4m. There is locally presence of Lanthanides (trace). Many stringers
of apatite (4-8%) and disseminated pyrite cluster (1-3%) are observed. Few syenites enclaves
are disseminated through the facies. The hole never reached the mineralized REE zone. The
contact is slightly off set on the West and parallel to the drilling direction.
The 2012-REE-057did not leaves the transition zone and returned a value of 0.643% TREO /
601.8m (from 41.6m) including 0.018% HREO / 601.8m. The REEs distribution is
homogeneous with the 2012-REE-054 and 2012-REE-059 values drilled on the same section
(2800E).
13.5.30 2012-REE-058
The 2012-REE-058 is located on the West area of the REE zone (MTME 255998.77: MTMN
5378352.29). It was drilled at 301° (true north) with a dip of -50°. The objective was to
intersect the west contact at depth. The overburden is 5.9 m thick. From 5.9 m to 54 m, the
Trenton limestone covered the carbonatite. The first interval of carbonatite facies is
interpreted as the regolith, a hematite, chlorite and siderite strongly altered facies. From 54 m
to 111 m, a breccia facies strongly altered (hematite, chlorite and siderite). It is difficult to
determinate mineral phase. From 111 m to 149 m, a massive dolomitic facies (C1L), rich in
REEs minerals (5%), with disseminated pyrite and locally apatite stringers is logged. At 149
m, the contact with the transition zone is traversed. A syenite enclave’s rich breccia facies
(SC2) composed of 60-70 % syenite and 30-40% of carbonatite (C2) is described. This facies
is depleted in REEs minerals but included disseminated pyrite (1-2% and apatite stringer
(3%). From 207 m to 351 m, the syenite enclaves proportion decreased (4-5%).
The REEs zone interval returned a value of 1.319% TREO / 95m (from 54m) including
0.032 HREO / 95m when the transition zone returned a value of 0.800% TREO / 202m
(from 149m).
13.5.31 2012-REE-059
The 2012-REE-059 is located on the South-East area of the REE zone (MTME 256404.94:
MTMN 5378111.15). It was drilled at 031° (true north) with a dip of -50°. The objective
was to intersect the South contact at depth. It was plan to begin in the transition zone and
finish in the REE zone. The overburden is 12.2 m thick. From 12.2 m to 22.3 m, the Trenton
limestone covered the carbonatite. The first facies encounter was a massive textured and a
coarse grained carbonatite facies (C2). There is few syenite enclaves through this facies
3400, chemin du Columbium, St-Honoré-de-Chicoutimi, QC G0V 1L0 Canada – tel. : 418 673-4694 Fax : 418 673-3179
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