- 340 claims, 6,977 Ha, 100 %Harfang
- 15 kilometres strike along Casa Berardi trend
- Historical drilling 10.90 g/t over 10/25m
- 2021 airborne magnetic and LiDAR surveys
- New interpretation demonstrates highly prospective, underexplored property scale target
- Next steps include till sampling, IP, diamond drilling
Blakelock is a highly attractive exploration property since it covers 15 kilometres of the prolific Casa Berardi Deformation Zone. Previous shallow drilling has yielded high-grade gold intersections from the Porphyry Creek zone including 10.9 g/t Au and 95.7 g/t Ag over 10.25 metres including 210 g/t Au and 1200 g/t Ag over 0.4 metres, Esso Minerals (1988) and 1.26 g/t Au over 5.9 metres and 11.53 g/t Au over 6.0 metres including 81.9 g/t Au over 0.7 metres (Lake Shore Gold Corp. 2008-2012).
Geologically, the rocks are in the northern portion of the Abitibi greenstone belt in northeastern Ontario, 60 kilometres west of the Casa Berardi gold mine, which is currently operated by Hecla Mining Co. The Detour Lake gold mine (Agnico Eagle) is located 50 kilometres north and the Timmins gold camp is located 150 kilometres to the southwest. The property is 100% owned by Harfang and is subject to a 2% NSR Royalty with a buydown provision of 1% payable to Maverix Metals Inc.
Since the discovery of the Casa Berardi Gold Mine in the late 1980’s, several major companies explored the area based on airborne EM anomalies and magnetic trends, utilizing regional and more detailed basal till and bedrock chip sampling with reverse-circulation (“RC”) drilling. This regional work was follow-up with diamond drilling which on Blakelock resulted in the discovery of the Porphyry Creek zone which has returned numerous drill intersections.
The Blakelock property geology has been interpreted utilizing historical RC bedrock chips and diamond drill core combined with airborne magnetics, as outcrop is sparse. Bedrock is comprised of a volcano-sedimentary package intruded by numerous intermediate to felsic dykes and late stocks between two granitic masses. All supracrustal rocks have subjected to greenschist to a local lower amphibolite grade metamorphism. The general strike is 070 to 080 degrees with steep north dips approximately 70 degrees.
The northern portion of the property consists of an east-west sequence of massive to pillowed mafic volcanic flows that are overlain by intermediate to felsic tuffs. The southern portion of the property consist of dominantly biotite-rich greywacke, conglomerate, siltstone and iron formation sediments. Timiskaming-type sediments have been noted on the eastern portion of the property. The volcanics, tuffs and sediments have all been intruded by feldspar-quartz porphyries. These sequences are typical hosts to some of the major gold mines in the Abitibi.
Several hydrothermal alteration mineral assemblages possibly related to gold mineralization have been observed in different parts of the property, and include sericite, biotite, silica and chlorite. A pink alteration of some feldspar porphyries suggests potassic alteration and hematization which are commonly associated with gold mineralizing events.
The gold mineralization is associated with pyrite and/or quartz (±tourmaline) veins near volcanic/porphyry contacts and within porphyries.
In May 2021, a 170.2 line-km LiDAR survey was flown over the property covering an area of 70 km2. Resultant products from this survey have aided in interpretation of bedrock features and in the future diamond drill planning and 3D modeling of historic and newly formed datasets. At the same time, a high-resolution helicopter-borne magnetic gradiometer survey was flown at 100 m line spacing totalling 771 line-km for coverage of 69.8 km2. Several magnetic images were produced as part of a first pass interpretation highlighted prospective structural areas as well as possible geological contacts and will serve as a useful tool to aid in modeling the geology of the Property.
COMPELLING EXPLORATION TARGETS
Work by Harfang has demonstrated the sediment package on the southern portion of the property represents a prime exploration target which has received little drilling as it is a similar rock sequence that hosts the Casa Berardi gold mine. Structural contrasts between adjacent rock types within and along the margins of this sedimentary sequence represent excellent exploration targets.
Specific existing and untested RC bedrock chip anomalies occur in the following areas:
- 0.24 to 0.56 g/t Au 3 to 3.5 km east of the Porphyry Creek zone
- An untested gold in till anomaly of 3.47 g/t, 3.5 km east of the Porphyry Creek zone.
- 0.10 to 0.20 g/t Au 1200 metres southwest of the Porphyry Creek zone
Recommended work to bring the property to the drill stage includes
- Selected reverse circulation (“RC”) drill hole program on the eastern portion of the Property to test the sedimentary package
- IP geophysics would help define areas of elevated chargeability related to sulphide mineralization that may be associated with gold mineralization
- Diamond drilling