Northern Superior Reports 3.59 G/T AU Over 7.7 Metres 800 Metres East of Resource Pit and 2.89 G/T Over 10.6 Metres From Under Resource Pit at Philibert, Mobilizes Second Drill Rig, and Comments on New Nelligan Resource Estimate

TORONTO, ON / ACCESS Newswire / March 3, 2025 / Northern Superior Resources Inc. ("Northern Superior" or the "Company") (TSXV:SUP)(OTCQX:NSUPF)(GR:D9M1) is pleased to announce additional results from its 20,000 metres expansion drilling campaign at the Philibert gold property, located only 9 km from IAMGOLD Corporation Ltd. ("IAMGOLD")'s Nelligan project, and 60 km southwest of Chibougamau, Quebec (the "Philibert Project": Northern Superior: 75%, SOQUEM: 25%^[1]).

Highlights Include (Grades uncut; lengths measured along hole, Table 1):

• PB-24-459: 3.59 g/t Au over 7.7 metres, including 8.53 g/t Au over 3.0 metres, located 800 metres east of the pit extent along the hanging wall trend;

• PB-24-462: 0.78 g/t Au over 21.5 metres; situated 750 metres east of the pit extent along the hanging wall trend;

• PB-25-476: 2.5 g/t Au over 8.4 metres, including 6.47 g/t Au over 1 metre and 2.89 g/t over 10.6 metres, including 5.15 g/t Au over 5.3m, located in the upper footwall of the Grey Fox Zone; and

• 1.12 g/t Au over 29.0 metres and 0.56 g/t Auover 81.2 metres resulting from recomposited intervals with historical core and previously unsampled historic core.

"Considering that the current Mineral Resource at Philibert, consisting of 1.7 million ounces inferred and 278,000 ounces indicated, is confined within a 3 km pit, today's results demonstrating the presence of high-grade mineralization 800 metres beyond the pit eastern boundary further underscore the significant untapped potential of the deposit andfurtherreinforces our confidence in the broader mineralized system. This follows our recently announced intercept of 2.6 g/t over 26.5 metres, located 200 metres east of the pit," said Simon Marcotte, President and Chief Executive Officer.

Additionally, the Company has submitted 1,800 metres of historical drill core for analysis. These core samples, originally drilled by Soquem, the project's previous operator, were not a priority at the time, as the resource model was then focused on underground high-grade potential. Historical core analysis has proven valuable in refining the deposit model and enhancing geological understanding. The processing of these historical samples has contributed to a delay in receiving assay results for the current drill program; further results should be expected shortly.

Below are new assay results from a combination of newly collected core samples and re-evaluated historical drill core. These results include assays from previously unsampled core intervals, as well as recalculated composite grades from historical drilling, applying updated methodologies to ensure consistency with modern standards. This work has successfully identified new areas of mineralization especially in the central part of the western extent of the MRE pit with drill hole 981-89-142 returning 20.4 metres of 1.12 g/t Au and improved grade continuity in the Red Fox and Arctic Fox zones with results such as hole 981-14-281 returning 81.2 metres of 0.56 g/t Au and from drill hole 981-87-043 with 29.0 metres of 1.12 g/t Au.

Table 1: Significant Historic Drillhole Intersections

Northern Superior is also pleased to announce the arrival of a second drill rig at the Philibert property, which began operation last week. Since the launch of the drilling campaign, Northern Superior has completed approximately 8,500 metres in 2024 and 4,800 metres in 2025, totaling over 13,000 metres, primarily targeting the southeast extension and expansion of the Philibert pit.

IAMGOLD's Updated Nelligan Resource

On February 20, 2025, IAMGOLD Corporation announced a resource update for its 100%-owned Nelligan Project, located just 9 km from Northern Superior's Philibert Project and less than 2 km east of Northern Superior's Lac Surprise property.^[2]

"With this new resource calculation at Nelligan, the Chibougamau Gold Camp now hosts over 12 million ounces across various categories, collectively owned by IAMGOLD and Northern Superior, making it one of the largest gold camps globally that is not controlled by a major producer. The camp increasingly draws comparisons to Kinross' Fort Knox mining complex in Alaska,^[3]" said Simon Marcotte, President and Chief Executive Officer.

Northern Superior firmly believes that its projects in the area, namely Philibert, Lac Surprise, and Chevrier, hold strategic value where the camp could benefit from optimization by prioritizing both higher-grade material and material with higher recovery to enhance the camp's economics.

Notably, Philibert already boasts an average grade of 1.1 g/t, but when applying a 0.5 g/t cutoff, the grade increases by more than 20% to approximately 1.33 g/t while retaining approximately 90% of its total ounces.^[4] Furthermore, metallurgical testing at Philibert showed flotation concentrate recoveries of up to 95.6% (see press release dated July 6, 2023). Northern Superior also views the Lac Surprise Project as having a strong geological continuity with Nelligan, reinforcing its potential as a high-value exploration target

Drilling Results

Drillholes PB-24-457 through PB-24-463 targeted the hanging wall zone from 700 to 900 metres east of the current Mineral Resource Estimate ("MRE") pit. Results confirm the potential for further expansion along strike, demonstrating both higher-grade intervals and broader zones of lower-grade mineralization. These drillholes extended exploration beyond the pit boundary and tested potential mineralization in previously unexamined sections over a 185-metre strike length. Drill hole PB-25-476 tested the Grey Fox zone under the current Mineral Resource Estimate ("MRE") pit. See Figure 1 for a plan map of the drilling.

Figure 1: Plan Map of Philibert 2024 Diamond Drilling

Drill hole PB-25-476 returned 2.5 g/t Au over 8.4 metres, including 6.47 g/t Au over 1 metre from the upper footwall of the Grey Fox zone and 2.89 g/t Au over 10.6 metres, including 5.15 g/t Au over 5.3m from the footwall of the Grey Fox Zone. The intersection tested mineralization at 160 metre vertical depth and approximately 40 metres below the current MRE pit. The 2025 program has focused on expanding the depth of the mineralization in the southeast end of the current pit. More results are expected to be reported in the near future.

See Figure 2 below for section L08880W including drill holes PB-24-457, PB-24-458 and PB-24-462. Drill hole PB-24-462 returned 0.78 g/t Au over 21.5 metres including 7.45 g/t over 0.8 metres and 6.55 g/t Au over 1.0 metre focused along the litho-structural contact of mafic volcanic, argillite and the Philibert gabbro. The intersection is highly fractured, silicified with variable sulphide abundances. Drill holes PB-24-457 and PB-24-458 intersected the contact up-dip over narrow widths returning 2.2 g/t Au over 2.1 metres and 0.53 g/t Au over 8.7 metres respectively.

Figure 2: Section L08880W at 80 metres width, looking northwest, Au g/t filtered > 0.1 g/t Au

See Figure 3 below for section L08800W including drill holes PB-24-459, PB-24-460 and PB-24-463. Drill hole PB-24-459 returned 3.59 g/t Au over 7.7 metres including 8.53 g/t over 3.0 metres focused along the hanging wall litho-structural contact. The intersection is highly fractured, silicified and host variable sulphide abundances. Drill hole PB-24-463 intersected the contact up-dip across significant widths with modestly anomalous grades and further downhole intersected some isolated anomalous values that correspond to mineralized zones along strike from historic drilling. PB-24-463 also intersected a quartz feldspar porphyry interval at the base of the hole that returned some weakly anomalous background gold values. Drill hole PB-24-458 intersected the contact down dip although at lower grades and widths but may have been drilled short of the new interpreted zone. This is also the case for drill hole PB-24-461 drilled 80 metres east of section L08800W where the last sample returned 0.40 g/t over 1 metre. The Company is planning to extend this hole in the near future.

Figure 3: Section L08800W at 80 metres width, looking northwest, Au g/t filtered > 0.1 g/t Au

The drilling confirmed that the northern contact of the Philibert gabbro remains a highly prospective target, with strong deformation, silicification, and sulphide mineralization associated with litho-structural contact. Additional work, including litho-geochemical sampling and structural analysis, is ongoing to refine future drill targeting. Further drilling is planned to better delineate these zones and assess their strike extensions to the east and west.

Table 2: Significant Drillhole Intersections