Grafton Resources Starts Heliborne Mobile MT Geophysical Survey at Alicahue Gold-Copper Project, Chile

Executive Summary

• Grafton Resources announced the commencement of an 80 km mobile magnetotelluric (MobileMT) heliborne survey over its Alicahue Gold‑Copper Project in Valparaiso, Chile.
• The survey, conducted by Expert Geophysics Surveys Inc., will cover the entire property in a single day with results expected in March 2026.
• Management expects the data to deliver a 3‑D image of subsurface structures, aiding identification of potential porphyry centres and IOCG vein systems.

Key Details

• Survey Scope: 80 line‑kilometre MobileMT heliborne survey covering the full Alicahue Gold‑Copper Project.
• Provider: Expert Geophysics Surveys Inc.
• Timeline: Survey completed in one day; data interpretation slated for March 2026.
• Technology: Combines MobileMT (depth ~1–2 km) with complementary VLF‑EM data to enhance resolution of shallow and deep geological features.
• Objectives:
• Identify deep‑seated faults, lithological contacts, and structures controlling mineral systems.
• Trace the outline of a possible porphyry centre in the southeast concession.
• Locate origins of IOCG vein systems and potential feeder zones for gold‑copper mineralization.
• Management Comment: Campbell Smyth (Interim CEO & Chairman) highlighted expectations that MobileMT will reveal conductive sulphide bodies linked to porphyry intrusions and resistive bodies indicative of intrusive centres.

Notable Quotes

“We expect the Mobile MT data will provide a three‑dimensional image of the Alicahue Project area…MobileMT is known for identifying areas of electrically conductive sulphides potentially linked to mineralized porphyry intrusive centres, and resistive bodies representative of intrusions.” – Campbell Smyth, Interim CEO & Chairman.