Magna Terra survey, sampling expand Birch to 4.2 km

Executive Summary

• Magna Terra Minerals Inc. has expanded the geochemical footprint of the Birch zone on its Humber copper-cobalt project in Newfoundland to a potential strike extent of 4.2 kilometres, up from the previously reported 2.2 kilometres.
• The expansion is based on 1,084 new soil samples collected south, southwest, and northeast of the Birch zone, which show significant copper and cobalt anomalies coincident with a linear magnetic low signature from a recent airborne VTEM survey.
• The company identified three kilometres of additional untested strike extent to the southwest based on airborne magnetics, supporting the potential for a district-scale discovery analogous to global sediment-hosted stratiform copper (SSC) deposits.

Key Details

• Geochemical Expansion: The Birch zone's geochemical footprint has been extended to 4.2 kilometres in strike length, combining 1,084 new samples with 837 samples from a previous release (Nov. 18, 2025).
• Sampling Methodology: 1,084 soil samples were collected over a 5.0-kilometre strike length at 200-metre line spacing and 25-metre sample spacing. Grid lines were oriented northwest-southeast, perpendicular to northeast-southwest-trending magnetic anomalies.
• Copper Results: Copper values range from below detection (<5 ppm) to 1,130 ppm. Of the 1,084 samples, 25 (2.3%) assayed over 50 ppm Cu.
• Cobalt Results: Cobalt values range from below detection (<2 ppm) to 100 ppm. Of the 1,084 samples, 58 (5.4%) assayed over 20 ppm Co.
• Geophysical Correlation: The copper-cobalt trend is spatially coincident with a magnetic low outlined in the recently completed airborne VTEM survey.
• Future Potential: Airborne magnetics indicate a further potential strike extension of the Birch zone by a minimum of three kilometres to the southwest.
• Project Scale: The district-scale land package comprises 49,925 hectares.
• Historical Context: The project hosts regionally anomalous lake sediments with elevated Co (up to 160 ppm), Ag (up to 0.6 ppm), Pb (up to 84 ppm), Cu (up to 185 ppm), As (up to 142 ppm), Mo (up to 15 ppm), and Au (up to 10 ppb).
• Geological Analogue: The metal signature and geological environment are supportive of SSC deposits, which host 60% of global cobalt production and 20% of global copper production.
• Laboratory Analysis: Samples were analyzed at Eastern Analytical Ltd. in Springdale, Nfld., for gold (30-gram fire assay) and multielement geochemistry (ICP-34).

Notable Quotes

• "The results of this additional soil sampling program continue to progress what is becoming a very exciting and potentially significant discovery zone, that we now refer to as the Birch zone. The elevated Cu and Co in soil samples and their coincidence with a magnetic low is suggestive that the Birch zone can be extended by an additional two kilometres to a potential minimum strike length of 4.2 kilometres." — Lew Lawrick, President and CEO, Magna Terra Minerals Inc.
• "The strong correlation between the surface geochemical signature and magnetic low is very encouraging as the magnetics indicate a further potential strike extension of the Birch zone a minimum of three kilometres to the southwest." — Lew Lawrick, President and CEO, Magna Terra Minerals Inc.