in the Cadillac mining camp:
Five projects are a resounding success!
Direction de Géologie Québec
The Cadillac-Larder Lake Break hosts
deep-seated mineral potential. Five exploration projects located
in the Cadillac mining camp provide ample proof of this. Significant
gold ore zones have been delineated within the fault zone at Lapa,
and the "J" zone
at the Doyon mine. Furthermore, the Lapa deposit represents one
of the most important mining discoveries to take place in Québec
in recent years. Other projects such as those in the 36 East
Zone at the former O’Brien mine and below the former Bousquet
mine are also likely to yield promising mineral potential.
An exploration campaign launched in 2002
on the Lapa property, held by
Agnico-Eagle Mines Ltd, delineated a deposit with an inferred
mineral resource estimated last June at 4.0 million tonnes
at a grade of 8.5 g/t Au (over one million ounces of gold).
The ore zone, dubbed the Contact Zone, was traced to a depth of
1,200 metres. It remains open at depth and to the west. A second
structure, the Contact South Zone, was discovered in late 2003.
A few months later, Agnico-Eagle Mines Ltd. announced that a 3.2 million-dollar
budget would be allocated to test the depth extensions of the Contact
and Contact South zones, and to test the eastward extension of the
favourable geological horizon.
In 2003, Queenston
Mining Inc. confirmed the extension of the Contact Zone onto
its Pandora property, located just west of the Lapa property. The
mineralized zone was identified in three locations: the Lapa Contact,
Keel Contact and Central Contact zones. On January 13, 2004,
the company reported a new drill program, comprising at least eight
holes, would be undertaken in order to test the depth extension
of the Lapa Contact Zone.
Mines Ltd continues exploration at depth and to the west of
Zone 20 North at the LaRonde mine. The latest results indicate
the presence of a higher-grade gold core, and have also shown that
Zone 20 North may become wider at depth, southward and westward.
This project, dubbed LaRonde II, will be allocated a budget of $3.8M
for exploration and feasibility studies.
Note that Agnico-Eagle Mines also intends
to explore at depth underneath the 3-1 Zone at the Bousquet
mine (shut down in the fall of 2002), acquired from Barrick
Gold in 2003. The company is also targeting the extension of
known ore zones on the Ellison property located further west. A
budget of $2.3M is set aside for this work.
A very deep drillhole collared in November 2002
by Cambior inc.
on the Westwood property, located 2 km east of the Doyon mine,
intersected two mineralized zones. The first occurs along the broad
extension of zones 1 and 2 of the Doyon mine, whereas the second
consists of the Westwood horizon. In 2004, Cambior Inc. will
drill another hole from the surface to test the depth extension
of the zone, and will drive a 2.6-km-long exploration drift from
the Doyon mine to reach the Westwood area.
Zone J at the Doyon mine
On March 6, 2003, Cambior Inc. released
promising results from an exploration program launched in October 2002
on the “J” zone at the Doyon mine. This structure,
located east of existing infrastructure at the Doyon mine, was traced
to a depth of 1,000 metres and remains open at depth and eastward.
Based on a preliminary evaluation, the “J” zone
contains an inferred diluted resource of 356,000 tonnes at
a grade of 7.5 g/t Au.
Other known showings
The Cadillac mining camp (PDF
Format, 603 Kb) also contains the former Wood Cadillac,
Central Cadillac, Kewagama, O’Brien and Thompson Cadillac
(New Alger) mines. With the exception of the O’Brien mine,
these consist of near-surface deposits from which only a few hundred
thousand tonnes of ore were extracted. Very little exploration work
has been carried out throughout this area at depths greater than
Radisson Mining Resources Inc. intends
to test the depth potential on the O’Brien property. A drill
program involving at least six holes was announced, to test the
eastward and depth extension of the 36 East Zone. Other gold
showings are known west of the Thompson Cadillac mine. Very little
exploration has been carried out on these showings, and the gold
potential at depth remains unknown.
Work by the MRNFP
Mapping by the MRNFP (Dubé and
Moorhead, 2002; Lafrance et al., 2002, 2003 and 2004) has provided
a better understanding of the geology in the Cadillac area (PDF Format, 603 Kb).
Within this framework, Fallara et al. (2003) prepared a common-earth
3D model of the area surrounding the Doyon-Bousquet-LaRonde
mines, in order to synthesize all available geological, lithogeochemical
and drilling data and to promote the use of this new technology
as an exploration tool. The longitudinal section (PDF Format,
88 Kb), which extends from the Mouska mine in the
west eastward to the LaRonde mine, shows all drillholes completed
in this area. Note that drillholes exceeding 500 metres depth
are few and far between. This figure also shows the gradual eastward
deepening of the lower boundary of known ore zones, shown in red.
If the Contact Zone on the Pandora
property extends over more than 4.5 km, as Queenston Mining
Inc. seems to believe, the potential on this property is considerable.
The same can be said for the eastward extension, over 1 km,
of the favourable horizon on the Lapa property. Moreover, between
the Doyon mine and the Westwood property, a very wide area at depth
offers tremendous gold potential. Zones beneath the Ellison showing
and under the Bousquet mine are currently attracting the attention
of Agnico-Eagle Mines. Further south, with the exception of the
O’Brien mine, a 19-plus-km segment of the Cadillac–Larder
Lake Break is essentially untested at depth. This represents a considerable
volume of rock. Exploration completed to date has identified several
important gold zones at depth in the Cadillac mining camp, but a
significant proportion of the bedrock located at more than 500 metres
depth remains unexplored.
DUBÉ, B. – MOORHEAD, J.,
2002 – Synthèse des résultats du camp minier
de Doyon-Bousquet-LaRonde : problématique et objectifs,
Ministère des Ressources naturelles, Québec, Programme
et résumé des conférences, 23e Séminaire
d’information sur la recherche géologique, DV 2002-10,
FALLARA, F. – LAFRANCE, B. –
CHENG, Z.C. – BOUDRIAS, G. – CÔTÉ, J. –
BÉDARD, N. – LEI, Y. – DUBÉ, B. –
GALLEY, A.G., 2003. Modèle 3D géo-intégré
de la Formation de Bousquet, Zone volcanique sud de la Sous-province
de l’Abitibi, Québec, Ministère des Ressources
naturelles, de la Faune et des Parcs, Québec, Résumés
des conférences et des photoprésentations, Québec
Exploration 2003, DV 2003-09, page 24.
LAFRANCE, B. – DAVIS, D.W. –
MOORHEAD, J., 2002 – Contexte stratigraphique et volcanologique
du camp minier de Doyon-Bousquet-LaRonde, Ministère
des Ressources naturelles, Québec, Programme et résumé
des conférences, 23e Séminaire d’information
sur la recherche géologique, DV 2002-10, page 21.
LAFRANCE, B. – MOORHEAD, J. –
DAVIS, D.W., 2003 – Cadre géologique du camp minier
de Doyon-Bousquet-LaRonde, Ministère des Ressources
naturelles, Québec, ET 2002-07, 43 pages.
LAFRANCE, B. – DUBÉ, B.
– GALLEY, A.G. – MERCIER-LANGEVIN, P. – CÔTÉ,
J. – BÉDARD, N. – LEI, Y. – HANNINGTON,
M.D. – DAVIS, D.W. – MOORHEAD, J. – PILOTE, P.
– MUELLER, W.U., 2004 – Évolution volcanique
et métallogénique de la Formation de Bousquet, Groupe
de Blake River, Abitibi, Ministère des Ressources naturelles,
de la Faune et des Parcs, Québec, Résumés des
conférences et des photoprésentations, Québec
Exploration 2003, DV 2003-09, page 23.