Announcement • Jun 27
Super Copper Corp Reports Results From Phase One Geophysics Program At Castilla Project
Super Copper Corp. has reported results from its phase one geophysics program at the 100%-owned Castilla Project. The integrated datasets define property-scale alteration and structural corridors that are spatially coincident with the high-grade gold and copper rock samples previously reported and have identified a new, previously unsampled iron-oxide gossan target in the northeast portion of the Project. WV3 hyperspectral mapping defines a large, coherent zone of phyllic (sericite) and propylitic (chlorite–epidote) alteration across central and southwestern Castilla, spatially coincident with the Company's highest-grade surface samples. Drone magnetic data (first vertical derivative of the reduced-to-pole field, "1VD-RTP") define conjugate northwest- and northeast-trending structural corridors. The highest-grade gold and copper rock samples cluster at the intersections of these structures, the dilational settings that typically focus mineralization in Atacama iron-oxide-copper-gold ("IOCG") systems. Mapped hematite alteration coincides with the magnetite-rich, high-iron zone in north-central Castilla, including sample E02505 (17.7% Cu, 39.1% Fe), consistent with an IOCG core. A large iron-oxide gossan and goethite footprint has been mapped in northeastern Castilla, in an area not covered by the Company's 2025 rock-sampling program. Gossans represent weathered, oxidized caps to sulphide bodies and are a recognized vector to copper mineralization. The near-absence of advanced argillic alteration (no detectable alunite and only minor kaolinite) is consistent with an IOCG /structurally-controlled system rather than a high-sulfidation epithermal system, helping to refine the exploration model. Total-field magnetic products, a three-dimensional magnetization vector inversion ("MVI"), and an induced polarization ("IP") survey are planned to model magnetite (IOCG) bodies and sulphide mineralization at depth, and to rank drill-ready targets for a maiden diamond drill program at Castilla. The drone magnetic survey was completed at Castilla over the Company's claim package, with magnetic data processing, structural interpretation and three-dimensional modelling performed by APEX Geoscience Ltd. The first vertical derivative of the reduced-to-pole field ("1VD-RTP") sharpens near-surface magnetic edges and reveals the Project's structural backbone: a dominant northwest–southeast trend, consistent with the regional Atacama structural grain, cut by a northeast–east-northeast set of cross-structures. Where those two directions cross is exactly where the highest-grade samples sit. The WV3 alteration mapping was completed by PhotoSat Information Ltd. using WorldView-3 satellite imagery and PhotoSat's deep-learning mineral-mapping process, delivered to the Company on June 11, 2026. The survey mapped twelve alteration mineral products at 2-metre resolution. Sericite (phyllic) alteration is widespread and intense across the central and southwestern Project area, hosting the Company's central gold corridor and southwestern copper occurrences. Chlorite-epidote (propylitic) alteration is extensive across the southwestern and central Project area, forming a broad peripheral halo. Hematite and iron-oxide alteration is concentrated in north-central Castilla, coincident with the interpreted magnetite-rich IOCG core and historical iron-oxide workings. Iron-oxide gossans and goethite have a large footprint in northeastern Castilla, in ground not previously sampled by the Company, interpreted as a new target. Together, the structural and alteration datasets indicate that the high-grade surface mineralization at Castilla sits within a large, coherent hydrothermal alteration system controlled by intersecting structures, a setting consistent with IOCG-style deposits of the Chilean Copper Belt. The Company is advancing the following work programs at Castilla: Total-field magnetic products and 3D MVI inversion. APEX will deliver the total magnetic intensity (reduced-to-pole) imagery and a three-dimensional MVI model to image magnetite-bearing bodies at depth and resolve magnetite-additive (IOCG core) versus magnetite-destructive (alteration) domains. The MVI methodology solves for magnetization direction and is suited to settings where remanent magnetization is present. An IP survey is planned to map chargeability associated with sulphide mineralization below the depth of effective surface sampling. Survey design will be finalized following review of the magnetic and alteration datasets. All datasets: surface geochemistry, structure, alteration, 3D magnetics and IP, will be integrated under the supervision of the Company's Qualified Person to prioritize and rank targets for a prospective maiden drill program at Castilla. These programs at Castilla advance in parallel with the Company's maiden diamond drill program at its Cordillera Cobre Project, where drilling of geophysically-defined IOCG targets is expected to start soon. The scientific and technical information in this news release has been reviewed and approved by Michael B. Dufresne, M.Sc., P.Geo., P.Geol., of APEX Geoscience Ltd., who is an independent Qualified Person as defined under National Instrument 43-101 – Standards of Disclosure for Mineral Projects. Grab and channel samples are selective by nature and are not necessarily representative of the mineralization hosted across the Project. Historical workings and artisanal mining observations referenced herein do not constitute a mineral resource estimate and should not be relied upon as such.
