Black Mammoth Metals Finds IP and Magnetic Target Zone at Big Bear Copper Property, AZ

Executive Summary

• Black Mammoth Metals announced the results of a pole‑dipole induced polarization (IP) survey and UAV magnetic survey at its 100% owned Big Bear Copper property in Arizona, identifying a new “Target Zone” that overlaps and expands the historic copper oxide zone.
• The surveys delineated coincident high chargeability, high resistivity, and magnetic anomalies along a NW‑trending fault, suggesting potential undiscovered primary sulfide mineralization.
• The company has also staked 29 additional unpatented lode claims, increasing the property’s total area to approximately 367 ha (909 acres).

Key Details

• Survey Design: Four north–south IP lines spaced 150 m apart; east‑west UAV magnetic flight lines spaced 25–50 m apart.
• Target Zone Characteristics: Co‑location of high chargeability, high resistivity, and a magnetic high along a NW‑trending fault zone.
• Historic Copper Zone Confirmation: Outcrop chip samples collected in 2025 confirmed a vertical extent of ~74 m for the known historic copper oxide zone.
• Exploration Objective: To confirm/expand the historic copper oxide zone and locate underlying primary sulfide mineralization; historical shallow drilling reached depths of up to 120 m, intersecting both oxide and sulfide mineralization.
• Implication: The newly delineated Target Zone suggests a larger undiscovered copper system may exist on the property.
• Land Expansion: Additional 29 unpatented lode claims staked; total property coverage now ~367 ha (909 acres).

Notable Quotes

“Black Mammoth Metals feels that the recent work‑up at Big Bear, including the newly delineated Target Zone, suggests that a larger undiscovered copper system may exist on the Property.” – Dustin Henderson, President & CEO.