Blakelock is a highly attractive exploration target covering 15 kilometres of the prolific Casa Berardi Deformation Zone. Previous shallow drilling has yielded high-grade gold intersections. There is potential is to discover a multi million-ounce gold deposit as evidenced by the gold intersections to date, bedrock geology and the producing districts surrounding the property.
Blakelock is located in the northern portion of the Abitibi greenstone belt (Abitibi) 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 (Kirkland Lake Gold) is located 50 kilometres north and the Timmins gold camp is located 150 kilometres to the southwest. The property is 100% owned by LaSalle subject to $400,000 in exploration expenditures which is expected to be completed this year.
Since the discovery of the Casa Berardi Gold Mine in the late 1980’s, several major companies explored the area, first by basal till and bedrock chip sampling with reverse-circulation (“RC”) drilling to follow up airborne electromagnetic and magnetic geophysical anomalies. This work was locally follow-up with diamond drilling (DD). The latter resulted in the discovery of the Porphyry Creek zone which has returned numerous drill intersections 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).
Untested RC bedrock chip anomalies occur in the following areas:
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 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.
Exploration at Blakelock has confirmed the presence of host rocks typical of multi-million ounce gold deposits, and also that an extensive gold system exists at the Porphyry Creek zone. Exploration priorities will be guided by: