Lac Ménarik Project
Figure 1. Geological map of the lake Ménarik area showing the Lake Ménarik Property. The outline of the Ménarik Est Property, also held by Harfang, is shown. Inset: Location of the Lac Ménarik Property near the junction between the James Bay and Transtaiga roads. Geology modified from Goutier et al. (1998).
|Figure 2. Rock samples with >1 g/t Au collected on the Lac Ménarik Property. The most significant gold showings were given names as shown on the figure. Geology modified from Goutier et al. (1998) and from Dianor’s exploration programs.|
- 93 claims (47.8 km2) 100%-held by Harfang (33F06); 2% NSR Osisko Gold Royalties;
- Easily accessible; 5 km east of the James Bay road, 30 km southeast of the La Grande airport; 45 km south of Radisson; 2 powerlines run through the mining claims;
- Property located in the La Grande Archean Subprovince (Superior Province); includes volcano-sedimentary rocks (Yasinski Group), intermediate to felsic intrusive rocks (Duncan Suite and Amisach Wat Pluton), sedimentary rocks with a Timiskaming-type conglomerate (Ekomiak Formation), and ultramafic and mafic lamprophyres; greenschist to amphibolite facies (metamorphic contrast along the Lac Ménarik Fault);
- Gold commonly associated with quartz-rich veins hosted in several types of lithologies: K-feldspar porphyritic monzonite, mafic volcanics, gabbro, wacke, arenite, iron formation, polymictic conglomerate; complex alterations (e.g. carbonates, quartz, hematite, chlorite, sericite, K-feldspar); disseminated sulphides: pyrite, chalcopyrite, pyrrhotite, arsenopyrite; mineralization most commonly in sheared, fractured and deformed lithologies;
- More than 500 surficial sampling sites grade between 1 and 1,918 g/t Au; showings were discovered at each exploration phase;
- Mineralization characterized by abundant high grades (with visible gold) and/or low tenors over large widths; some of the best results are:
0.89 g/t Au over 68.25 m (DDH) [Pierre showing]
0.75 g/t Au over 10.44 m and 0.76 g/t Au over 34.28 m (DDH) [Pierre Extension showing]
110.83 g/t Au (grab) and 1.06 g/t Au over 4.51 m (DDH) [Ekomiak showing]
1,917.75 g/t Au (grab) [Massé showing]
1.04 g/t Au over 24.9 m (Trench) [Greco showing];
- Two possible gold models: orogenic gold and syenite-associated gold;
- Only 17 drillholes in a small area of the property; no drilling since 2001;
- Many unexplained geophysical anomalies detected in two recent IP surveys;
- Upcoming exploration program: Trenching, sampling and localized mapping followed by drilling over specific targets.
The Lac Ménarik property is located 45 kilometres south of Radisson in the Eeyou Istchee-James Bay territory (NTS sheet 33F/06), Québec, Canada. The project is located 5 kilometres east of the James Bay Road and 30 kilometres southeast of the La Grande airport. The property, 100%-held by Harfang, is made up of 93 claims totalling 47.8 km2. It is accessible by ATV trails or by boat from the James Bay Road and by floatplane or helicopter.
Lithologies of the Lac Ménarik project belong to the Archean La Grande Subprovince, part of the Superior Province. These rocks comprise abundant sedimentary (wacke, conglomerate, iron formation) and volcanic rocks (mafic to felsic flows with minor tuffs) assigned to the Yasinski Group (2,732 +8/-6 Ma). Intermediate to felsic intrusions belonging to the Duncan Suite and to the Amisach Wat Pluton intruded the Yasinski Group about 2,716-2,709 Ma ago. Most of the known gold occurrences tend to be spatially-associated with some of the K-feldspar porphyritic intermediate intrusions of the Duncan Suite (quartz monzonite, monzonite and rare syenite). The Yasinski Group is covered by the Ekomiak Formation, a sedimentary sequence made up of wacke, mudstone, polymictic conglomerate and iron formation. That conglomerate (<2,714 Ma), containing abundant monzonite-looking clasts, is interlayered with metric bands of laminated lithic sandstone. It is thought to be mainly derived from the erosion of nearby Duncan intrusions which were exposed at surface due to active tectonics most probably in a continental fluvial system. The Ekomiak conglomerate shows striking compositional similarities with the Timiskaming conglomerate in Abitibi. Late mafic and ultramafic intrusions such as clast-bearing lamprophyres and Proterozoic gabbroic dykes crosscut all previously-described volcanic and sedimentary rocks and intrusions.
Lithologies on the property are metamorphosed from the greenschist to the amphibolite facies; the lake Ménarik masking a major fault limiting the two metamorphic domains. The dominant foliation is oriented ENE-WSW and dips moderately to steeply towards north. The structural pattern is typical of the polyphased ductile deformation commonly mapped in the La Grande Subprovince. Regional ENE-WSW to E-W shear zones and faults, often associated with quartz veining, alterations and gold mineralization, cut across the property. At some point in its tectonic evolution, the fault system may have developed into a pull-apart basin into which the Ekomiak Formation may have been deposited.