Mongoose Mining Announces Mount Thom 2025 Drill Program Results: Confirming IOCG-Style Copper-Cobalt Mineralization

Executive Summary

• Mongoose Mining released assay results from three 2025 diamond drill holes at the Mount Thom IOCG project, confirming multiple copper‑cobalt mineralized zones and a high‑grade copper–gold intercept.
• Hole MT‑25‑03 intersected a continuous 45‑m interval of disseminated copper (up to 4.98% Cu) and a 0.2‑m zone of 4.98% Cu + 1.74 g/t Au, indicating a central feeder system for the IOCG district.
• The results move Mount Thom from a conceptual exploration target to a technically validated mineral system with district‑scale potential, supported by shared funding from the Nova Scotia Mineral Resources Development Fund.

Key Details

• Drill Program Overview – Tested priority gravity anomalies identified in 2022 ground gravity survey; three holes (MT‑25‑01, MT‑25‑02, MT‑25‑03) completed November 2025.
• Hole MT‑25‑01 – Depth 497 m; intersected siderite‑flooded wall rock and localized copper at 7.0‑8.6 m (Cu ≈ ?), 20.5‑21.2 m, and 451.8‑452.1 m, suggesting margin of a mineralized system.
• Hole MT‑25‑02 – Depth 95 m; intersected historic breccia zone with:
• 20.0‑22.0 m: 710 ppm Co, 0.86 % Cu
• 24.0‑27.0 m: 1,792 ppm Co, 1.44 % Cu
• 41.0‑44.0 m: 139 ppm Co, 0.31 % Cu
• Best intervals up to 1.84 % Cu and 2,980 ppm Co over ≥1 m; elevated Ni and As also noted.
• Hole MT‑25‑03 – Depth 215 m; most significant results:
• Continuous 45‑m interval of disseminated copper from ~64‑109 m depth (consistent enrichment).
• High‑grade sub‑interval at 176.9‑177.1 m: 4.98 % Cu and 1.74 g/t Au over 0.2 m, confirming copper‑gold mineralization.
• Interpretation – Intercepts indicate both breccia‑hosted high‑grade zones and broad disseminated copper associated with hydrothermal alteration; MT‑25‑03 likely intersected a central feeder zone of the IOCG system.
• District Context – Independent work has identified 28 high‑priority IOCG targets across the Londonderry–Bass River district, supported by structural, geochemical, and geophysical models.
• Funding & Support – Drill program partially funded by Nova Scotia Mineral Resources Development Fund (NSMRDF); acknowledgment of Government of Nova Scotia support.
• QA/QC – Core handled per standard protocols; samples analyzed by ISO/IEC 17025‑accredited AGAT Laboratories using fire assay for Au and ICP‑OES/MS for multi‑elements; control sample rate ~1 per 10 regular samples, results within acceptable precision.
• Drill Hole Coordinates & Geometry:
• MT‑25‑01 – Collared 497 485 E / 5 038 138 N; azimuth 155°, dip –62°; total depth 497 m.
• MT‑25‑02 – Collared 497 426 E / 5 038 012 N; azimuth 95°, dip –45°; total depth 95 m.
• MT‑25‑03 – Collared 498 608 E / 5 037 299 N; azimuth 215°, dip –45°; total depth 215 m.
• Qualified Person – Terry Coughlan, P.Geo., Co‑President, reviewed and approved the technical information in accordance with NI 43‑101.

Notable Quotes

“We are very pleased to have received this shared funding from the Nova Scotia Government through the NSMRDF,” said Terry Coughlan, President of Mongoose Mining. “The results from MT‑25‑03 represent a pivotal step toward unlocking the potential of Mount Thom.”