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 | 50
(BRC1L). The fresh carbonatite breccia (BRC1L) continues down to 381 m. From 381 m to
516 m, the texture changed from breccia to massive dolomitic carbonatite (C1L).
The hole 2012-REE-044 did not leave the mineralized zone. The vertical projection of the
contact in the 2011-RRR-023 should have been traversed around 450 m depth. Assays
results returned homogeneous lanthanides values all along the hole. 1.834% TREO / 480.7
m (from 35.3) including 0.025% HREO / 480.7 m. The weathered facies is enriched in REE
and returned a value of 2.328% TREO / 47 m (from 35.3m).
13.5.17 2012-REE-045
The 2012-REE-045 is situated in the North area of the REE zone (MTME 256305.52:
MTMN 5378523.95). It was drilled at 031° (true North) with a dip of -53°. The objectives
were to intersect the north contact at depth and continue the 100m x 100m mesh for the prefeasibility.
The overburden is 2.70 m thick. From 2.70 m to 52 m, the Trenton limestone
covered the carbonatite. The carbonatite begins in a strongly altered calcitic breccia facies
(BRC1LC). The paleo-weathering alteration is composed of hematite, chlorite and siderite.
The colour of the altered carbonatite varied in the warm shade of red and yellow. The calcitic
breccia facies continue down to 114 m. From 114 m to 498 m, massive dolomitic facies
(C1L) are layered with breccia facies (BRC1L).
The hole did not intercept the not mineralized carbonatite located on the north contact but the
assays showed a lower concentration of lanthanide after 378 m depth. Even if the
mineralisation decreased, the Northern transition contact can be considerate economically.
The 2012-REE-045 returned an overall value of 1.701% TREO / 443 m (From 52m)
including 0.027% HREO / 443 m but the best interval without the transitional contact
returned 1.976% TREO / 323 m (from 52m) including 0.031% HREO / 323 m.
13.5.18 2012-REE-046
The 2012-REE-046 is situated in the middle-south area of the REE zone (MTME 256110.67:
MTMN 5378197.12). It was drilled at 031° (true North) with a dip of -60°. The objectives
were to create a drilling pattern of 100m x100m and test the continuity of the lanthanide
mineralisation at depth. The overburden is 5.70 m thick. From 5.70 m to 32 m, The Trenton
limestone covered the carbonatite. A strongly altered breccia facies carbonatite (BRC1L)
(hematite, chlorite and siderite) is described down to 54 m. From there, the alteration
disappeared and the fresh breccia facies continues down to 444 m. From 444 m to 873 m,
massive dolomitic (C1L) and breccia carbonatite (BRC1L) facies are layered. Large intervals
are more calcitic composed (C1LC and BRC1LC), from 444 m to 480 m and from 673.40 m
to 714 m.
The 2012-REE-046 returned a homogeneous value all along the hole of 2.064% TREO / 873
m. (from 32m.) including 0.037% HREO / 873 m. This great interval confirmed the
homogeneous distribution of the lanthanides in the REE zone.
3400, chemin du Columbium, St-Honoré-de-Chicoutimi, QC G0V 1L0 Canada – tel. : 418 673-4694 Fax : 418 673-3179
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