Alpha Copper Announces Results of Magnetic 3D Inversion Study at the Star Project - Seite 2

Several linear features identified in the magnetic dataset suggest several faults transect the target area. The magnetic anomaly beneath the Star target area appears to have been affected by at least two of these magnetite-destructive features; these breaks correlate with mineralization in the historic drill logs and may represent a sulfide-forming fluid pathway. The deeper parts of this break in the magnetic anomaly, is south of the majority of drilling on the Star and has not been significantly tested with diamond drilling to date.

The Company will focus exploration work in 2023 on the Star target area (Figures 1 and 2) after a comprehensive interpretation of the recently completed geophysical modelling. The priority drill test zones target a potential high grade and near-surface oxidized zone, and deep-seated (>500 m) disseminated and vein-hosted mineralization within and adjacent to the magnetic anomalies; potentially the core of a gold-copper porphyry style mineralized system.

Technical Detail on the Geophysical Modeling and Targeting

The 3D magnetic inversion was completed using high-resolution aeromagnetic data acquired during a 2013 heli-borne magnetic survey at 100 metre flight line spacing. The data was inverted using a 75 m² by 37.5 metre mesh over the entire property and using a 25 m² by 12.5 metre mesh over a target area covering the Star, Star East, and Copper Creek target areas (Figure 2). The unconstrained magnetic inversion in the detailed area was completed to a depth of 500 metres below the surface, and thus is a useful exploration technique utilized in locating buried stocks of typically felsic to intermediate composition that could be associated with porphyry style mineralization. The inversion was incorporated in the geological model of the project that also includes geological, magnetic susceptibility, and structural data collected from previous drilling campaigns.

Figure 2. Plan-view of the Star Project mineral tenure with magnetic 3D modelled isosurfaces and predefined target areas shown is available at https://www.globenewswire.com/NewsRoom/AttachmentNg/95d23e11-0ebc-4778 .... The pink isosurfaces are the resultant coarse 3D inversion, and the teal isosurfaces show the results of a more detailed modelled 3D inversion. Note anomalous magnetic features that were revealed with the detailed inversion.