Projects
Milestone (Cu-Ni-Co)
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- Northstar’s 100%-owned Milestone Cu-Ni-Co Property consists of 28 contiguous, unpatented claim units covering 615 hectares within the Temagami greenstone belt in Strathcona Township, Ontario.
- Milestone exhibits similar geology, mineralization, stratigraphic setting and alteration as Teck Resources former high-grade Temagami Copper Mine located 20 km southwest along strike. The Temagami Mine produced approximately 900,000 Tons at an average grade of 6.0% Cu during the period 1955 to 1972*
- Milestone has seen bulk sampling, numerous geophysical surveys and 2,724 metres of diamond drilling in 27 holes between 1952 and 2001 by 5 previous operators including Geoscientific Prospectors Ltd. and Copperfields Mining Corporation, which later became Teck Corporation.
- Property includes the Diadem deposit, estimated to contain a historic estimate of 500,000 Tons grading 0.5% Cu and 0.1% Ni and remains open along strike and at depth.**
- Northstar completed a 76.7 line km UAV magnetic survey and sampling program at Milestone in late 2022.
- 72 representative surface samples were collected over a 1.5 km strike length of the lower metagabbro contact and include 29 samples with massive pyrite +/- pyrrhotite, chalcopyrite, magnetite mineralization.
- Assay results of the 29 samples ranged from 0.20 - 1.52% Cu, 0.05 to 0.61% Ni and 0.005% to 0.134% Co.
- One sample (E455246) of massive pyrite with chalcopyrite collected within the footwall rhyolite 50 metres below the metagabbro contact in the O’Connor zone assayed 1.25% Cu, 1.31 g/t Pd, 0.46 g/t Pt, 0.41 g/t Au and 6.35 g/t Ag.
- The 76.7-line km, high resolution UAV magnetic survey was successful in delineating the Diadem and O’Connor zones from near surface to depths of 280 metres and 400 metres, respectively. Two new anomalies have been identified along the metagabbro contact, with one anomaly possibly extending the massive sulphide trend another 500 metres along strike to the ENE. The newly discovered Central Zone magnetic anomaly hosts massive sulphides with Cu-Ni-Co mineralization.
- 3D Inversion results of the magnetic data indicates that historic drilling failed to intersect the core of the magnetic anomalies associated with the Diadem and O’Connor zones, suggesting considerable exploration upside.
- Northstar has applied for Critical Minerals designation at Milestone to qualify for the 30% flow through tax credit to optimize future exploration expenditures at Milestone.
*Ontario Ministry of Energy, Northern Development and Mines Mineral Deposit Inventory Record MDI41I16NE00004: Temagami Copper Mine, Copperfields Mining Corp., Abex Mines Central Group.
**Bennett, G. 1978: Geology of the Northeast Temagami Area, District of Nipissing; Ontario Geological Survey Report 163, 128p. p.111
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Gallery
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Maps
