Rivière Allard
Location, Access, Description
The Rivière Allard property is composed of 4 contiguous mining claims covering an area of 223.62 ha located in Vezza Township in Abitibi (NTS: 32F12). The property is located about 160 kilometres north of the town of Val-d’Or (Qc) and 25 kilometres southwest of the town of Matagami (Qc). The claims are wholly owned by Globex and are not subject to any underlying royalties or third party interests.
The topography consists of low-rolling hills with elevations comprised between 260m and 270m above sea level. Several streams, rivers and wetlands can be observed on the property. The eastern half of the property seems to be the swampiest with the presence of the Allard River that crosses the property from north to south.
The property is easily accessible via Highway 109 which connects Amos and Matagami. At about Km 196 coming from Amos, one takes a forest road heading south to access to the property. This gravel road allows vehicle access to the entire western half of the property. Several exploration and forest trails then provide VTT access to the eastern half of the property.
Geology and Mineralization
Regional Geology
The Rivière Allard property is located in the Archean Greenstone Belt of the Abitibi Sub-province, in the Superior Province of the Canadian Shield. It’s more precisely located in the central-western part of the Northern Volcanic Zone of Abitibi (ZVN), within the Harricana-Turgeon Furrow (SHT) as defined by Lacroix et al., 1989 (PRO89-04). The SHT is composed of felsic to ultramafic metavolcanics intercalated with metasedimentary rocks of Matagami and Taïbi Groups in the northern contact of the Marest Batholith. They have a sub-vertical dip and peaks facing north according to Dussault, 1990 (MB90-43). The Marest Batholith is a pre- to syntectonic intrusion composed of foliated and locally porphyritic quartz-diorite and granodiorite (PRO89-04). Regional metamorphism is at the greenschists grade.
Intrusive rocks cover more than 40% of the SHT area. They belong to various plutonic sequences that can be assigned to four structural classes: pretectonic, pre- to early syntectonic, syn- to late tectonic and late- to post-tectonic (PRO89-04). The Bell River Complex is a stratified gabbro-anorthosite complex located about 20km NE of the Cavelier property, and associated with numerous base metals (Ni, Cu, Zn, Fe, V) deposits. Mineralized deposits of the SHT are either of polymetallic or gold types.
The major regional structural feature observed in the area is the Cameron Deformation Corridor (CDC) which is characterized by a series of anastomosed E-W shear zones that extend on more than 150 kilometres east and west of the Rivière Allard property. The CDC is 1-5 km wide and roughly corresponds to a graphitic band within Taïbi sediments, right north of the Cartwright Hills volcanics. The CDC hosts both Douay (Indicated Resources of 10.0 Mt @ 1.59 g/t Au – Gosselin et al., 2022 – Technical Report NI 43-101) and Vezza (Indicated Resources of 586 070t @ 6.3 g/t Au; Measured Resources of 658 780t @ 6.5 g/t Au – D’Amours et al., 2013 – Technical Report NI 43-101) deposits and therefore represents the best regional metallotect for gold and base metals mineralization.
Known showings and deposits of the area are primarily found within the CDC or in spatial association with either ESE graphitic horizons, banded iron formations and mafic volcanic horizons intercalated in the Taïbi Group sediments. The Vezza deposit is located at the contact between the Taïbi sediments and Orvilliers-Desmazures volcanics. Mineralization of the Vezza Deposit is composed of 1 to 15% pyrite and 1 to 10% arsenopyrite with minor amounts of pyrrhotite, sphalerite and chalcopyrite within quartz veins and veinlets, hosted in a highly brecciated and sheared sandstone horizon (GM58033). Banded iron formations are mapped within the Taïbi graphitic sediments in this area too. The Vezza deposit is characterized by intense iron carbonate alteration (siderite, ankerite, dolomite), low silicification, and low to moderate sericitization (GM56429). Local strong epidotization is observed giving mafic volcanics a bleached appearance.
Property Geology
Very few outcrops are available on the Rivière Allard property and most of geological knowing is deduced from drilling and geophysics. The property is located within the Taïbi Group which is composed of a homoclinal sequence of clastic sediments (sandstone, siltstone, mudstone, grauwacke and argillites) and limited iron formations and conglomerates. Some mafic volcanics of the Orvilliers-Desmazures Group are intercalated within the Taïbi sediments.
Numerous Input-EM anomalies are observed along volcanics on the property. The property hosts the northern branch of the Cameron Deformation Corridor (CDC) which is characterized by graphitic sediments.
Mineralization observed on gold showings in the vicinity of the Rivière Allard property consists of traces to 10% pyrite ±arsenopyrite within quartz, quartz-carbonate and quartz-tourmaline veins hosted in both sediments and volcanics, frequently associated with Input-EM anomalies. Best gold grades are generally found in sediments near contacts with banded iron formations and mafic volcanics.
Existing Mineral Resources
The Vezza Deposit (Indicated Resources of 586 070t @ 6.3 g/t Au; Measured Resources of 658 780t @ 6.5 g/t Au – D’Amours et al., 2013 – Technical Report NI 43-101) is located about 3 km ESE of the Rivière Allard property. The Douay Deposit (Indicated Resources of 10.0 Mt @ 1.59 g/t Au – Gosselin et al., 2022 – Technical Report NI 43-101) is located about 20 km west of the property.
The Vezza A-West showing (up to 2.13 g/t Au and 1.4 g/t Ag over 2.0m – GM50161) is located 1 km east of the Rivière Allard property and consists on weakly to moderately carbonated and silicified gold zones contained in veins and veinlets injected in mafic volcanics and sandstones. Felsic tuffs are locally associated with sericitized bands of semi-massive sulphides.
The Zone 6 gold showing (up to 2.65 g/t Au over 3.60m – GM53528) is located 2 km west of the Rivière Allard property. Mineralization is associated with silicified mafic volcanics near sediment contact or is related to quartz / quartz-carbonate / quartz-tourmaline veins hosted in graphitic shears cutting sediments (GM54243).
History
First exploration works listed in public data date back to 1957 when Aeromagnetic Surveys Ltd undertook regional Airborne magnetic survey (GM05225-A). Many other geophysical surveys including both Ground and Airborne Magnetism (Mag), Electromagnetism (EM) and Induced Polarization (IP) were completed afterwards which highlighted numerous anomalies (GM07285, GM07285, GM42354, GM43553, GM44662, GM48141, GM56317).
Geological mapping and grab sampling programs have also been completed in order to explore the area and verify geophysical anomalies on the field (GM39053, GM35597, GM51453, GM58800, GM62920, GM67317, GM70304).
Several DDH campaigns were carried-out throughout the years in order to test the best anomalies from geophysics : Claims Hall (GM06694-C, 1958), Compagnie de Nickel du Canada (GM48567, 1988), Mines Agnico-Eagle (GM50161, 1989 ; GM51832, 1992 ; GM52729, 1993 ; GM56447, 1997 ; GM63022, 2007), Explorations Noranda (GM47144, 1988 ; GM51453, 1992), SOQUEM (GM54243, 1996), and GFK Resources (GM70304, 2017).
These works led to the discoveries of the Vezza-A, Zone 6, and 90-07-09 gold showings.
Resources and Potential
The Rivière Allard property benefits of a privileged emplacement along the prolific Cameron Deformation Corridor (CDC) that hosts both Vezza and Douay gold deposits. Gold occurrences of the area are generally located at contact zones between the Taïbi sediments with mafic volcanics of the Orvilliers-Desmazures Group (Vezza Deposit, Zone 6) or with banded iron formations (Douay Deposit, Zone Aurifère de la Rivière Allard), which both represent marked magnetic interfaces.
Sulphide content of auriferous areas is generally comprised between 1 and 15% pyrite (±arsenopyrite, ±pyrrhotite, ±sphalerite and ±chalcopyrite) that can cause good EM and IP responses. As proof of that, the Zone 6 gold showing has been discovered in 1994 by drilling a IP anomaly associated with a high Mag (GM53528, GM54243).
NW-SE secondary structures also appear as a good metallotect for gold concentrations at both Douay and Vezza deposits.
It is therefore recommended to:
- Compile all historical data available in the vicinity of the Rivière Allard property and georeferenced every anomaly in a GIS Project ;
- Verify if all interesting anomalies have been explained by field observation or DDH ;
- Proceed to new Very High Resolution magnetic survey (NOVATEM) in search of marked magnetic interfaces corresponding to the contact between sediments and mafic volcanics or banded iron formations. NW-SE secondary structures should also appear on the Mag ;
- Plan new ground IP survey if necessary in order to cover the entire Rivière Allard property ;
- Verify every coincident Mag and IP anomaly as well as every IP anomaly along NW-SE structures on the field by prospection / stripping / diamond drilling.