Northstar Gold Corp. announced preliminary results from a Phase I diamond drill program at the historic Cam Copper Mine, a small-scale, former high-grade copper producer on the Company's 100%-owned Miller Copper-Gold Property, situated 18 kilometres southeast of Kirkland Lake, Ontario. The Cam Copper Mine is a road accessible satellite high-grade volcanogenic massive sulphide (VMS) copper system situated 2.4 km southwest of the Allied Gold Zone, the advanced, near-surface bulk-tonnage alkalic gold-telluride exploration target also being actively explored by Northstar. Cam Copper Mine occupies the southern portion of the historic Boston Creek Copper Trend. Northstar completed 720 metres of drilling in 4 diamond drill holes at Cam Copper Mine between October 20th and October 30th, 2023. The Company reports all 4 drill holes intersected lenses of Cu-rich volcanogenic massive sulphides, including massive and stringer chalcopyrite over 2.45m in drill hole CC03-23 between 116.55m to 119m in Zone 2. Analytical results for drill holes CC02-23 to CC04-24 are pending and expected shortly. The Company reports the following assay results received from drill hole CC01-23: 3.12% Cu over 3.6m from 25.0m to 28.6m including 19.45% Cu and 14.85 g/t Ag over 0.5m from 28.1m to 28.6m in Zone 1; 12.71% Cu, 0.62% Zn, 0.44% Pb, 16.47 g/t Ag over 0.75m from 107m to 107.75m in Zone 2; 5.91% Cu over 1.5m from 135.0m to 136.5m including 9.92% Cu over 0.5m from 135.5m to 136m in Zone 3. Massive sulphides were intersected in Zone 2 well below the 200' level of the historic mine workings at 130m vertical depth in drill hole CC02-23. Zone 2 appears to be expanding in thickness down plunge towards the southeast, and all zones remain open along strike and at depth. Volcanic exhalite mineralization consisting of massive or semi-massive pyrite is known to extend for hundreds of metres along strike southeast of the Cam Copper Mine site, having been previously explored by historic pitting and trenching. The copper trend includes multiple historic ground EM and IP bedrock targets3 along with strong airborne EM and magnetic anomalies which could highlight conductive bedrock targets such as Cu-rich massive sulphides for up to 900 metres along strike to the southeast. After receipt of all Phase I drill results, Northstar will position to conduct a Phase II Cam Copper drill program to test the down plunge extension of mineralized zones, prioritizing expansion of the Zone 2 massive sulphide lens and stockwork intersected in DDH CC03-23. Owing to the conductive and chargeable nature of the massive sulphide mineralization encountered at Cam Copper, a program of surface and borehole geophysics is also being planned to survey the mine site area and the Boston Creek copper trend along strike towards the southeast. The Cam Copper Mine hosts at least three separate lenses of massive copper sulphides about 30-50 metres apart striking and plunging southeast along the contact with the Round Lake Granite Batholith. Underground development took place between 1929 and 1953 which included sinking a 220' (66.7m) vertical shaft with 213' (64.5m) of cross cuts and 267' (80.9m) of drifts. The recent drilling and surface sampling results substantiate historic copper grades reported in a 1955 shipment of 346 tons of hoisted underground ore that produced 43,411 lbs. of Cu1 at a Noranda smelter, for a recovered grade of 6.3% Cu. The ore was shipped directly from the mine site to the smelter without requiring further concentration in a mill. A previous 1948 shipment of 22 tons of ore to Noranda reportedly graded 12.72% Cu, 0.84 oz/t Ag and 0.03 oz/t Au2, presumably from Zone 1. Historic drilling intercepts in Zone 1 by Consolidated Golden Arrow Mines Ltd. at the Cam Copper Mine include: 1.6% Cu over 6.6' (2.0m) in DDH 1, 9.8% Cu over 4' (1.21m) in DDH 1A, 12.4 % Cu over 7.8' (2.36m) in DDH 3 and 7.0% Cu over 6' (1.82m) in DDH 4. Average sampling grade reported in Zone 1 was 8.5% Cu over a true width of 4.4' (1.33m) indicated over 100' (30.3m) along strike. Historic drilling intercepts by Consolidated Golden Arrow Mines Ltd. in Zone 2 include: 10.5% Cu over 0.5' (0.15m) in DDH 2, 19.9% Cu over 3.1' (0.94m) in DDH 3, 23.1% Cu over 4.6' (1.39m) in DDH 4 down plunge extension below workings and 12.4% Cu over 3.3' (1.0m) in DDH 7 down plunge extension below workings. Average sampling grade reported in Zone 2 was 10% Cu over a true width of 2.8' (0.85m) indicated over 140' (42.4m) along strike. Bornite was reported to be common in Zone 2 with the bornite rich pods of massive sulphides remaining open down plunge to the southeast. Samples collected in the 2023 Miller surface exploration and drilling programs were delivered to ALS Global in Timmins, Ontario for preparation and assayed for gold and other elements by ALS Global in Vancouver, British Columbia. Northstar has implemented a quality control program for its Cam Copper Project to ensure best practice in the sampling and analysis of surface samples, which includes the insertion of blanks, and certified standards into the sample stream. Surface samples were submitted to ALS Global at their Timmins, Ontario facility for sample preparation where the entire sample was crushed to better than 90% passing 2mm, 1000g riffle split and pulverized to 85% passing 75 microns. Pulps are forwarded to ALS Global in Vancouver, British Columbia for analyses. Gold analyses is obtained via industry standard fire assay with ICP finish using 15 g to 30 g aliquots. For samples returning greater than 10 g/t gold follow-up fire assay analysis with a gravimetric finish is completed. Based on initial fire assay gold indications as well as visual
indication of mineralization and alteration, samples are selected for re-assay by the screen metallic fire assay method. Samples are also analyzed for 48 trace and major elements by ICP-MS following a four-acid digestion. For samples returning greater than 10,000 ppm Cu, follow-up four acid digestion and ICP finish utilizing a 0.4 g sample is utilized. ALS Global are ISO/IEC 17025:2017 accredited for the preparation and analyses performed on the Milestone samples.