Adanac
Location, Access, Description
The Adanac property is located about 8 km south-east of the town of Rouyn-Noranda, in the Abitibi-Temiscamingue Administrative Region, western Quebec. The property is composed of 10 contiguous mining claims totalling 560 ha in Rouyn township (NTS 32D02). These titles are fully owned by Globex Mining Enterprises Inc. The property is easily accessible by road from Rouyn-Noranda, driving on Highway 117 south and turn right onto the Rang du Village just past McWatters.
Geology and Mineralization
Regional Settings
The Adanac property is located in the Archean Abitibi Greenstone Belt of the Superior Province of the Canadian Shield, on the contact between the Abitibi and Pontiac Sub-provinces. Rocks of the Abitibi Sub-province were deposited between 2 791 and 2 672 Ma (DV 2006-03). The Timiskaming Group (2 678 – 2 672 Ma ; Goutier et al., 1994 ; Davis, 2002) represents the youngest sediments of the Abitibi Sub-province. Numerous archean synvolcanic, syntectonic and late-tectonic intrusions set in place within both archean volcanics and sediments of these two sub-provinces. Rocks of the Pontiac Sub-province are a little younger than those of the Abitibi (MB 94-55). All archean rocks of this area have been verticalized during the Kenorean orogenesis that occurred about 2.5 billion years ago.
The Cadillac-Larder Lake (CLL) fault is the major regional feature of the area, extending on more than 250 km in a E-W strike. Numerous showings and deposits have been uncovered along this prolific structure in both Quebec and Ontario provinces. The CLL fault strikes 1 km north of the Adanac property and it separates the rocks of the Blake River Group in the north from those of the Timiskaming Group in the south.
Regional metamorphism is at the greenschists grade and locally reaches the lower amphibolite grade around large Archean intrusions. Proterozoic diabase swarms cut through every Archean rocks.
Property Geology
The northern half of the Adanac property is set on Timiskaming metasediments composed of polygenic conglomerates, sandstones and greywackes of the Granada Formation.Numerous quartz veins cut through the Timiskaming sediments and traces to 2% pyrite and arsenopyrite can be observed locally (GM 53662). Two main foliations are reported in GM 68015 within the Timiskaming on the property : N260°/Sv and N315°/-70°.
The southern half is set on the Pontiac metasediments, composed of massive greywackes intercalated with argillaceous and schistosed greywackes (GM 53662). Graded bedding is commonly observed.
Stratigraphy is generally E-O dipping north or south between -60° and -85°. The contact of the Pontiac Group with the Granada Formation is ENE. Shear zones and faults are sometimes present along this contact (GM 52670). The NE-SW oriented Davidson fault crosses the southeast part of the property ; it has a senestre component and shows an apparent horizontal displacement of 1.5 km. Late NE and NO fractures and E-O shear zones are also present on the property and in the vicinity (GM 52670).
A regional syncline fold hinge is mapped in public data within the Timiskaming sediments in the very northern part of the Adanac property.
Metallogeny
The Abitibi Greenstone Belt hosts several world-class deposits and has produced more than 210 Moz Au historically (Dubé and Mercier-Langevin, 2019), which makes it one of the largest and richest in the world. The Larder Lake – Cadillac fault is one of the major gold metallotect in the Abitibi Sub-province.
Many gold mineralization, including the former Astoria, Granada, O’Neill-Thompson, Heva and Hosco mines, are associated with the Timiskaming Group in the Rouyn-Noranda region. The Granada mine is located about 8 km west of the Adanac property. Free orogenic gold is observed on the edges of smoky quartz veins mineralized with fine pyrite and arsenopyrite, inside faults and shear zones affecting the Timiskaming sediments. Strong silica-chlorite-carbonate alteration is observed around mineralized zones. After two periods of production (1930-1935 : 165 Kt @ 10.83 g/t Au et 1.71 g/t Ag, DV 85-08 ; 1993-1994 : 49.05 Kt @ 3.67 g/t Au, DV 95-01), the project is presently explored by Granada Gold Mine inc. A NI 43-101 Resource Estimate signed by SGS Canada in 2021 indicates 5.96 Mt @ 2.34 g/t Au (449,000 oz Au) in the Measured and Indicated category (Camus & Dupéré, 2021).
A NE-SW diabase dyke belonging to the Matachewan swarm cuts all archean lithologies in the western part of the property.
Several showings are listed in the property area. The Adanac showing is hosted in Pontiac metasediments, while the Lemire (Beauchamp), Lac Vallet and Adanac (Zone Nord-Ouest) ones are hosted in the “Tourmaline Zone” (GM 68015 and GM 69325) within Timiskaming metasediments. Two (2) main types of gold mineralization are observed: 1) quartz-tourmaline-pyrite (±arsenopyrite and iron carbonate) veins and 2) grauwackes and conglomerates tourmalinized, pyritized and sometimes carbonated and chloritized (GM 53662).
History
Several works have been done on the property since the 1920’s, including prospection and geological maping, rock stripping, channel sampling, geophysical and geochemical surveys, and diamond drilling (GM 69325). More details about the history of exploration in that area is proposed in Cloutier (2007 ; NI 43-101 Report on the Adanac Property) and in the Adanac property compilation by Globex (Garant & Riopel, 2016 ; GM 69325).
These works lead to the discovery as soon as during the 1930’s of three (3) gold anomalies (Adanac, Lemire and Lac Vallet gold showings) both within Pontiac and Timiskaming sediments. A 520 feet deep exploration shaft has been sank directly on the Adanac showing in 1933 (GM 42742).
Mineralization is of orogenic type and occurs in quartz-carbonate (±tourmaline) veins hosted in subvertical 0.5 to 2 metres wide zones shear zones. A biotite-silice (±fuchsite) alteration is typically observed inside the mineralized zones, as well as tr-5% disseminated sulphide and local brecciation. Discontinuity of the mineralized zones has been observed both on surface showings / strippings and in DDH holes (GM 68015). Historical works thus defined a limited economic potential due to the narrow veins and high variability of gold grades.
Most recent work carried-out on the property is that of Osisko Mining Corp. and Threegold Resources in 2012, during which the companies jointly undertook ground spectrometry survey and extensive grab sampling on a property covering the present Adanac property (GM 68015). Spectrometry was used to identify possible K-alteration halos inside hydrothermal alteration zones. Two (2) K-anomalies have been highlighted on Globex’s Adanac property.
This work leaded to the discovery of a new mineralized zone within the Timiskaming sediments, in the northwest corner of the present Globex’s property hosting the Adanac (Zone Nord-Ouest) gold showing. Four (4) grab samples from the 2012 program returned between 1 ppm Au and 4.25 ppm Au in this area from rocks where both quartz-carbonate veins and disseminated sulphides were noted. No rock stripping or DDH has ever been carried-out in this area.
Resources and Potential
To date, four (4) gold anomalous areas have been identified by historical work on the Adanac property. On the map views, the Lac Vallet, Lemire (Beauchamp) and Adanac (Zone Nord-Ouest) showings appear to align on a same strike and could therefore be associated to a same structure (the “Tourmaline Zone”?) whose dimensions have not been defined yet.
The Lemire and Adanac gold showings have been historically investigated with particular attention, but limited exploration was done on both Lac Vallet and Adanac (Zone Nord-Ouest) showings. No diamond drilling has ever been implanted on either of these two sites despite gold anomalies as high as 17 g/t Au over 1.60m (Lac Vallet channel sampling, GM 42742) and 5.74 g/t Au (grab sample, GM 68015) on the Adanac (Zone Nord-Ouest) showing. Both in-depth and lateral continuity remains strongly unknown on these two areas.
The presence of four (4) gold anomalous areas, the observation of a strong hydrothermal system at a property scale, as well as the proximity of the Cadillac–Larder Lake regional fault are three main reasons to pursue exploration of the Adanac property. Future work should start with observation and re-sampling of each showing and historical trenches, paying strong attention to structures and alterations. Then the efforts should be focused on the Lac Vallet and Adanac (Zone Nord-Ouest) areas with ground IP and resistivity surveys, in order to plan rock stripping. K-anomalies from the spectrometry survey of Osisko should be considered when planning geophysical grids and mechanical stripping.
Depending on the observations and results of Phase 1, DDH should be considered in a Phase 2 of exploration to test the in depth extensions of the best anomalies.