Northstar Gold Corp. announced the results of a surface exploration program and high resolution airborne magnetic survey over the Company's 100%-owned, 615 hectare Milestone Property, situated 3 km southwest of the town of Temagami, Ontario. Northstar carried out a brief surface exploration program consisting of prospecting and sampling of the key metagabbro trend on the Milestone Property between November 10th and 16th, 2022.

A total of 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 collected both in-situ from historic workings or surface gossan and from historic muck piles. 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. Surface sample copper grades from the O'Connor and Diadem zones were consistent with historically reported grades from both drilling intercepts and surface sampling.

Nickel and cobalt assays, however, were generally higher than previously reported, which could be related to historic under-reporting due to incomplete sample digestion with the commonly used aqua regia digest preparation method vs. the current, more reliable four acid digest + ICP-MS analysis method utilized by Northstar. One in-situ 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 discovery of this massive sulphide "pod" within the footwall rhyolite is significant as massive sulphide pods with chalcopyrite and precious metals in the footwall rhyolite formed the main ore constituent at the historic high-grade copper Temagami Mine, located along strike 20km to the southwest. In addition to the discovery of multiple sulphide pods below the gabbro contact, another zone hosting massive sulphides with Cu-Ni-Co mineralization was discovered between the Diadem and O'Connor zones with one sample (E455258) assaying 1.25% Cu, 0.61% Ni and 0.081% Co from a historic muck pile. Samples collected from another trenched area 50 metres to the west of the previous sample produced similar results with one sample (E455255) assaying 1.0% Cu, 0.34% Ni, 0.066% Co with 0.2 g/t Pd and 0.3 g/t Au.

No records of drilling or previous sampling had been reported for this area along the contact which was identified as a linear magnetic anomaly at a high angle to the main body of gabbro. This could possibly represent a zone of structurally hosted sulphides extending below the metagabbro contact or a mineralized gabbro dike. Radial "Offset" dikes associated with the Sudbury Igneous Complex are responsible for a significant proportion of the total Cu-Ni-Co production of the Sudbury mining camp.

Follow up surface work is required on the Milestone Property to fully investigate both this new discovery as well as the sulphide pods in the footwall of the O'Connor zone. A 76.7-line km, high resolution UAV magnetic survey was conducted by Quebec based Vision4K on the Milestone Property on November 8th, 2022, utilizing a stabilized MAG-drone survey system equipped with a Scintrex Cs-VL Cesium Vapor magnetometer and collision avoidance sensors. The line spacing was 25 metres, and the line orientation was 355.5° true, chosen to be perpendicular to geological strike.

Ronacher Mckenzie Geoscience leveled the detailed TMI data and inverted it to produce a 3D model of the magnetic vector amplitude in the survey area. The data were inverted on a 12.5 m square horizontal mesh over the entire survey area. The vertical mesh cells started at 6.25 m thickness, increasing with depth.

In addition, Ronacher McKenzie produced magnetic filter products. Based on the magnetic data, the metagabbro unit is interpreted to be a broad, 200 m wide anomalous zone of high magnetic response, oriented ENE-WSW over a strike length of approximately 1.5 km. The metagabbro unit is not uniform and is interrupted by NNW and NW striking linear magnetic features.

Previous structural interpretation of LiDAR data on the property are also generally consistent with the magnetic data indicating disruption of the gabbro. Cross cutting structures frequently hosted massive chalcopyrite mineralization at the Temagami Mine and are prospective for follow up work. The Diadem zone is coincident with a strongly magnetic ovoid anomaly, approximately 150 m x 250 m in area.

An unexplored group of three smaller (50-100 m) magnetic features lie approximately 450 m to the ENE of the magnetic high associated with the Diadem prospect with the largest of these features appearing very similar to the Diadem anomaly in the 3D inversion results . This new discovery could represent an extension of the massive sulphide zone along the metagabbro contact to the ENE. Ground truthing and sampling is being planned in this area.