December 9, 2025 — Leads & Copy — Core Silver Corp. (CSE:CC)(FSE:8ZR)(OTCQB:CCOOF) has released visuals and geological highlights from drill hole LAV25-011, the second of four deep exploratory diamond drill holes completed in the 2025 season at the Laverdiere Copper Project in British Columbia’s Atlin Mining District.
The 2025 exploration campaign tested the depth potential and continuity of a large (5 km x 8 km) multi-phase Cu-Mo-Ag±Au porphyry system through diamond drilling, structural mapping, and surface sampling. Seven drill holes were completed across five key target areas along the Valley Fault Zone, totaling 3,857 meters drilled.
Drill hole LAV25-011 intersected broad intervals of Cu-Mo-Ag porphyry mineralization and associated alteration from the surface to over 725 meters depth at the Valley Zone. The hole extended the Laverdiere Porphyry System by 300 meters, extending the step-out between holes LAV25-010 and LAV22-006 to approximately 2.1 kilometers.
The drill hole intersected copper and molybdenum mineralization hosted in quartz veins measuring up to 40 centimeters thick below 550 meters depth. Alteration and mineralization styles show zonation patterns from Mo-Ag dominant in upper levels to Cu-Mo-Ag-rich below 350 meters, suggesting increasing proximity to a copper-molybdenum-silver-rich ore body open laterally and at depth.
Drilling and structural mapping have traced porphyry-style Cu-Mo-Ag±Au mineralization over 4.5 kilometers, from North Adit (Main Skarn Zone) to Lower Copper Creek, and to drilled depths up to 730m.
Core Silver’s President & CEO, Nick Rodway, said LAV25-011 indicates Laverdiere’s potential for hosting a large porphyry system. He added that extending mineralization by 300 meters and observing consistent Cu-Mo-Ag zonation patterns across multiple holes reinforces the view that the company is vectoring toward a robust porphyry center that remains open in all directions.
LAV25-011 was designed to test the depth extent and continuity of Cu-Mo-Ag-bearing porphyry veins intersected in drill hole LAV25-010, as well as to test the mineralization potential of a coinciding magnetic low geophysical anomaly located on the southern side of the Valley Fault. The hole was drilled steeply to the south to a final depth of 800 meters.
The upper oxidized zone intersected contained early quartz-vein hosted molybdenite and chalcopyrite mineralization (±pyrite ±bornite), locally overprinted by late silver-bearing sulfosalt and specular hematite-molybdenite-bearing veins and breccias. Epithermal quartz-carbonate veins are abundant in upper levels. Below 350 meters drilled depth, molybdenum and copper (chalcopyrite ±bornite) mineralization becomes more abundant, coarser-grained, and hosted in thicker vein sets with depth (up to 40cm).
Wider zones of porphyry Cu-Mo-Ag mineralization were intersected in LAV25-011, with narrow zones of late-to-post mineral porphyry phases bounding zones of well-developed mineralized veining and associated intense alteration.
Changes in metal and mineral content indicate that hole LAV25-011 intersected a broader zone of increased hydrothermal activity and structural complexity compared to LAV25-010, suggesting that the hole intersected an upper marginal zone proximal to a large, multi-phase Cu-Mo-Ag porphyry centre.
All 2025 rock and drill core samples were transported to the core logging facility in Atlin, BC for processing and submitted to Bureau Veritas (BV) Labs in Whitehorse, YT. Drill core samples included blanks and certified reference standard materials inserted for every 20 core samples. Each rock and core sample is crushed to 70% passing 2mm, then pulverized to 85% passing 200-micron mesh. All samples then undergo a 4-Acid digestion with an ICP-MS finish for a 59-element ultra trace package (Method Code MA-250), as well as fire assay by Pb collection with ICP-ES finish for Au, Pt, and Pd (Method code FA-330). Samples that hit upper detection limits are further analyzed via a secondary 4-Acid digest with an ICP-OES finish (Method Code MA-370). Extremely high-grade Pb samples were analyzed via a tertiary overlimit method, GC-817.
Soil samples collected in 2025 were also transported by helicopter. Samples were dried in kraft sample bags on-site before being batched for shipment to BV Labs in Whitehorse, YT, where each sample is dried at 60°C and sieved to pass -180 µm (80 mesh). All samples then undergo an aqua regia extraction with an ICP-ES/MS finish for a 36-element package (Method Code AQ200).
Nicholas Rodway, P.Geo, is President, CEO and Director of Core Silver Corp. and a qualified person as defined by National Instrument 43-101. Mr. Rodway supervised the preparation, verified and approved the technical content in this release.
Nicholas Rodway
President & CEO
Tel: 604.681.1568
Source: Core Silver Corp.
