Barksdale Resources Surpasses Phase II Drilling Target, Set to Boost Sunnyside Stake to 67.5%

Completion of Phase II Earn-In Milestone

On 27 July 2026, Barksdale Resources confirmed its 2026 exploration drilling at the Sunnyside copper-zinc-lead-silver project exceeded the contractual 25,000-foot drilling requirement. This marks a key achievement in the company’s nearly nine-year joint venture with Great Basin Metals (formerly Regal Resources) to advance its interest in the property.

Having met all spending and drilling commitments outlined in the joint venture agreement, Barksdale awaits written confirmation from Great Basin Metals. This confirmation will release an escrowed payment consisting of C$550,000 in cash and 4,900,000 common shares, enabling Barksdale to increase its ownership in Sunnyside to 67.5%, with Great Basin Metals retaining the remaining interest.

Updated Assay Results for Drill Hole SUN26-013R

Barksdale updated assay results for drill hole SUN26-013R, incorporating previously excluded overlimit copper values (exceeding 10,000 ppm) from four assays. The restated composite interval from 615 to 870 feet now reports 65.5 metres grading 0.47% copper and 1.24 grams per tonne silver.

Within this interval, a higher-grade section of 7.6 metres returned 1.93% copper and 1.96 g/t silver. These results align with mineralization observed in earlier drill holes SUN26-001R, -002R, and -003R, as reported on 4 May 2026, reinforcing Barksdale’s exploration model regarding the mineralization’s geometry and characteristics at Sunnyside.

Large-Scale Copper Lode Vein System Identified

Alan Roberts, Vice President of Exploration at Barksdale, stated that the four drill holes collectively delineate a large, continuous copper lode vein system extending over 600 metres along strike and reaching depths up to 1,000 metres. The veins appear to follow a northwest-southeast structural trend and may represent the upper expression of a larger porphyry copper-molybdenum system at depth.

The mineralization occurs within sericitic to advanced argillic-altered quartz monzonite to monzonite porphyry. The alteration assemblage, dominated by sericite and quartz and overprinted by pyrophyllite, quartz, barite, and local epithermal silicification with quartz veins, is typical of upper porphyry-style deposits. Roberts hypothesizes that the high-grade hypogene copper sulfides form part of a porphyry system lacking a significant supergene enrichment blanket, with the sulfide veins representing the system’s uppermost expression.

Porphyry Copper System Characteristics and Mineralization Style

Barksdale’s geological assessment, combined with historical drilling, indicates a broad, low-grade chalcocite zone surrounding the porphyry body, consistent with classic porphyry copper system architecture. This includes lower-grade supergene and hypogene envelopes surrounding higher-grade vein and stockwork mineralization near the surface. The absence of a well-developed supergene enrichment zone distinguishes Sunnyside’s mineralization style.

Identifying a Cu-Mo porphyry system suggests significant scale and depth potential. Porphyry deposits typically represent large-tonnage, lower-grade systems extending to great depths. The company’s interpretation that high-grade copper sulfide veins are the upper expression of deeper mineralization implies that the economic potential may lie in bulk-tonnage mineralization at depth rather than narrow high-grade veins at current drill depths.

Quality Assurance and Sampling Procedures

Barksdale detailed its quality assurance and quality control (QAQC) protocols. Reverse circulation chip samples are collected at the drill rig, placed in bar-coded bags, and transported to a secured compound for drying before shipment. Dried samples are consolidated into totes and transported by Skyline Assayers to their Tucson, Arizona laboratory.

All 2026 drill samples underwent multi-element and gold analysis at Skyline Assayers & Laboratories. Samples are crushed to over 75% passing -10 mesh (2000 microns), then pulverized to over 95% passing -150 mesh (100 microns). Gold is analyzed by fire assay with atomic absorption spectroscopy on 30-gram charges. Multi-element analysis uses aqua regia digestion with ICP-OES for 31 elements. The company retains all pulps and rejects for long-term storage.

QAQC Sample Insertion and Review

Quality control samples are inserted at a 6% rate: 2% certified reference materials, 2% blanks, and 2% field duplicates collected onsite. Results from the QAQC program are reviewed by Barksdale’s Qualified Person to ensure accuracy and precision before data release.

Alan Roberts, Vice President of Exploration and a Certified Professional Geologist (CPG #11260), serves as the Qualified Person under National Instrument 43-101 standards. His review and approval of the technical information meet Canadian regulatory requirements for mineral disclosure.

Sunnyside Property and Regional Mining Overview

The Sunnyside copper-zinc-lead-silver project is situated in Arizona’s Patagonia mining district, an area with historic base metal production and recognized mineral systems. Barksdale holds a 51% interest through its joint venture with Great Basin Metals, with potential to increase to 67.5% following Phase II earn-in completion. Sunnyside is one of two Arizona projects in Barksdale’s portfolio, alongside the San Antonio copper project, also in Patagonia.

The company is also advancing the San Javier copper-gold project in central Sonora, Mexico, as part of its North American base metal exploration strategy. Sunnyside’s proximity to established mining infrastructure and its location within a mineral-rich district offer logistical advantages for future development pending successful exploration and resource estimation.

CEO Remarks on Nearly Nine-Year Milestone

William Wulftange, CEO and Director of Barksdale, described meeting the Phase II drilling requirement as "a major milestone for the company, nearly nine years in the making." This highlights the extensive effort to accumulate sufficient drilling metres under the joint venture to define mineralization and demonstrate continuity of the copper lode vein system.

Wulftange acknowledged shareholders, the Board, exploration teams, and support staff for their roles in achieving this milestone, emphasizing the collaborative nature of this accomplishment and signaling momentum toward advancing the project upon Great Basin Metals’ written confirmation.

Next Steps and Ownership Transition

Barksdale has fulfilled all contractual obligations and awaits written confirmation from Great Basin Metals verifying Phase II earn-in completion. Upon confirmation, the escrowed payment of C$550,000 and 4,900,000 shares will be released, increasing Barksdale’s ownership in Sunnyside from 51% to 67.5%.

The announcement does not specify a timeline for confirmation or outline subsequent exploration or development plans. Investors will likely monitor for updates on Phase III activities, further drilling, or progress toward a preliminary economic assessment or resource estimate. The Phase II completion positions Barksdale to assume greater operational control and decision-making at Sunnyside.

Company Overview and Market Presence

Headquartered in Vancouver, British Columbia, Barksdale Resources is a base metal exploration company focused on acquiring, exploring, and advancing high-potential North American base metal projects. In 2023, it was recognized as an OTCQX BEST 50 Company, highlighting its status among early-stage mineral explorers trading on U.S. over-the-counter markets.

Barksdale’s shares trade on the TSX Venture Exchange (BRO), OTCQB (BRKCF), and Frankfurt Stock Exchange (2NZ), providing liquidity and access across multiple markets. The company’s focus on copper, zinc, lead, and silver aligns with global demand driven by infrastructure, renewable energy, and industrial applications.