Copper Fox Reports Additional Mineralized Intervals Advancing The Van Dyke ISCR Project

2026-05-26 06:09:09

(MENAFN- Newsfile Corp) Copper Fox Reports Additional Mineralized Intervals Advancing the Van Dyke ISCR Project

May 26, 2026 6:00 AM EDT | Source: Copper Fox Metals Inc.

Calgary, Alberta--(Newsfile Corp. - May 26, 2026) - Copper Fox Metals Inc. (TSXV: CUU) (OTCQX: CPFXF) (FSE: HPU) ("Copper Fox" or the "Company"), through its wholly owned subsidiary, Desert Fox Van Dyke Co., is pleased to report the final analytical results from the previously announced historical diamond drill core sampling program (see news release dated April 21, 2026). The program was designed to further define the limits of total soluble copper ("TSCu") mineralization and the mineralogical domains within the Van Dyke copper deposit. The Van Dyke in-situ copper recovery ("ISCR") project is 100%-owned by Copper Fox and is located in the Globe-Miami Mining District, Gila County, Arizona.

This news release reports analytical results for 18 drill holes, 15 of which returned intervals exceeding the TSCu cutoff of 0.025% (ASCu% + CNCu%) used in the 2020 mineral resource estimate ("MRE"). Analytical results have now been received for all 29 drill holes included in the 2026 core sampling program.

Highlights

DDH OXY-46 returned a 74.60-metre core interval (286.51 m to 361.19 m) averaging 0.273% TCu and 0.223% TSCu, including a 19.51-metre interval averaging 0.518% TCu and 0.453% TSCu.

Work on the updated PEA is progressing across resource estimation, cost modelling, engineering, geotechnical, water treatment and hydrogeological studies.

Elmer B. Stewart, President and CEO of Copper Fox, stated, "The positive results from the drill core sampling program have expanded the limits of the total soluble copper envelope at the Van Dyke copper deposit and could influence the updated mineral resource estimate, a critical component of the revised PEA. An updated mineral resource and improved definition of the mineralogical domains are important to optimizing the underground access concept and wellfield layout in support of the proposed leach operation."

PEA Update:

Completion of the updated PEA will provide a current technical assessment of the project and evaluate potential development scenarios to support a robust business case for advancing the project to the Preliminary Feasibility Study ("PFS") stage. The PEA is assessing underground access alternatives to optimize future wellfield design and projected copper production, as well as infrastructure, water treatment, energy requirements and process design configurations, which will form the basis for estimating initial capital, operating and sustaining costs. Once completed, these inputs are expected to support updated pre-tax and post-tax economic models for the project. The PEA is also expected to identify data gaps that will help guide future programs, enhancement opportunities and inform the technical work plan and permitting strategy required to advance the Van Dyke project to the PFS stage.

Analytical Results

Of the 29 drill holes sampled in 2026, 21 returned TSCu concentrations exceeding the 0.025% cutoff used in the 2020 mineral resource estimate (see news release dated March 25, 2020). The analytical results of primary economic interest are acid soluble copper ("ASCu") and, to a lesser extent, cyanide soluble copper ("CNCu"). The analytical results and locations of the historical drill holes discussed in this news release are presented in Table 1 and Figure 1.

The weighted average grades for the mineralized intervals presented in Table 1 were calculated using a 0.025% ASCu cutoff. Intervals containing ASCu values below the cutoff over lengths of five metres or less, (including missing samples), were included in the weighted average grade calculations. CNCu weighted averages are presented for information purposes.

Table-1: Partial results of 2026 sampling of historical drillholes from Van Dyke project

DDH ID	From (m)	To (m)	Int. (m)	TCu (%)	ASCu (%)	CNCu (%)	TSCu (%)	RESCu (%)
M-2	272.19	325.98	53.80	0.543	0.399	0.017	0.416	0.127
includes	285.29	319.89	34.60	0.725	0.571	0.021	0.592	0.133
OXY-10	515.11	522.73	7.62	0.132	0.026	0.018	0.044	0.088
OXY-17B	330.10	332.84	2.74	0.189	0.120	0.009	0.129	0.060
OXY-18	499.26	502.31	3.05	0.217	0.192	0.005	0.197	0.020
includes	590.09	598.93	8,84	0.162	0.096	0.006	0.102	0.060
OXY-26	308.76	318.82	10.06	0.090	0.065	0.007	0.072	0.018
OXY-29	437.39	451.10	13.72	0.219	0.036	0.014	0.050	0.169
OXY-31	563.88	566.93	3.05	0.067	0.023	0.003	0.026	0.041
OXY-46	270.97	382.22	111.25	0.226	0.181	0.007	0.188	0.038
includes	270.97	279.81	8,84	0.437	0.355	0.014	0.369	0.068
	286.51	361.19	74.68	0.273	0.214	0.009	0.223	0.050
	286.51	306.02	19.51	0.518	0.441	0.012	0.453	0.065
	368.20	382.22	14.02	0.253	0.215	0.007	0.222	0.030
UVD-12	505.97	513.59	7.62	0.095	0.030	0.010	0.040	0.056
UVD-13	355.09	376.12	21.03	0.059	0.038	0.001	0.039	0.020
VD-1	592.53	598.93	6.40	0.062	0.027	0.029	0.056	0.006
VD-5	469.70	481.89	12.19	0.047	0.031	0.014	0.045	0.002
includes	494.08	524.56	30.48	0.053	0.033	0.003	0.036	0.017
	582.47	600.76	18.29	0.067	0.028	0.010	0.037	0.030
VD-6	502.92	527.91	24.99	0.075	0.028	0.019	0.047	0.028
VD-7	474.88	478.32	3.44	0.141	0.026	0.015	0.041	0.100

Notes to Table-1: TCu=total copper, ASCu=acid soluble copper, CNCu=cyanide soluble copper, RESCu=residual copper, TCu=ASCu+CNCu+RESCu, TSCu=(ASCu+CNCu). All drill holes discussed are vertical (inclined at -90o dip), and each has an azimuth of zero (0o). True thickness and widths of mineralization are currently unknown.

Figure-1: Location map showing historical drillholes discussed in this news release.

To view an enhanced version of this graphic, please visit:

Comments on Analytical Results

The analytical results from drill holes M-2 and OXY-46 increase drill hole sampling density and returned TSCu concentrations consistent with other previously sampled drill holes in this higher-grade portion of the Van Dyke copper deposit. Overall, the 2026 sampling program was successful in filling analytical gaps, extending low-grade TSCu mineralization at depth, and improving the definition of the Oxide, Transitional and Sulphide mineralogical domain boundaries within the Van Dyke deposit.

Hydrogeology Studies:

The preliminary groundwater flow model for the Bloody Tanks Wash drainage basin is currently in the calibration stage. Early results have significantly improved the Company's understanding of the hydrogeological controls affecting the Van Dyke project and indicate that local groundwater flow may be influenced by historical mining activity in the Miami-Globe Mining District.

Q1-2026 Ground water Monitoring:

Results for the Q1-2026 monitoring data including field water quality parameters, water level measurements and analytical results are consistent with that observed in previous quarters. VWP data showed consistent responses with past quarters, with no seasonal patterns evident. Additional monitoring locations are planned in subsequent quarters to expand the water quality dataset and improve the understanding of groundwater flow and recharge dynamics for the Van Dyke project.

Quality Control, Sampling and Analytical Procedures

Copper Fox follows a rigorous Quality Assurance/Quality Control program. The 2026 sampling program consisted of 359 samples, including 332 pulp and core samples, 18 certified reference standards and nine blanks collected from 29 historical drill holes. All drill holes are NQ diameter core. Samples taken from DDH M-2 were whole-core. The other drill hole samples were pulped 1⁄2 core.

Skyline Assayers and Laboratories Inc. (Accreditation 2953.01; ISO/IEC 17025:2017) in Tucson, Arizona, completed sample preparation and analysis. The Transitional zone of the Van Dyke deposit contains a mixture of acid soluble copper minerals (malachite, azurite and chrysocolla) and chalcocite, a secondary copper sulphide. Samples were prepared using preparation code SP-1 - crush to 75% passing 10 mesh, split and pulverize with standard steel to 95% passing 150 mesh - and analyzed using analytical code SEA-CuSEQ-Res, a sequential leach method used to determine acid soluble, cyanide soluble and residual copper.

Qualified Person

Elmer B. Stewart, MSc., P.Geol., President and CEO of Copper Fox, is the Company's non-independent Qualified Person, as defined under National Instrument 43-101 - Standards of Disclosure for Mineral Projects, and has reviewed and approved the scientific and technical information disclosed in this news release.

About Copper Fox

Copper Fox is a Canadian resource company focused on copper development and exploration in the United States and Canada. Copper Fox and its subsidiaries own 100% of the Van Dyke ISCR project, a development-stage, potential near-term, mid-sized copper project in Arizona, and a 25% interest in the Schaft Creek Joint Venture with Teck Resources Limited (75% interest and operator), which hosts the Schaft Creek copper-gold-molybdenum-silver project in British Columbia's Golden Triangle. In addition, Copper Fox owns 100% of the resource-stage Eaglehead polymetallic porphyry copper project in northwestern British Columbia, as well as the Sombrero Butte and Mineral Mountain advanced-stage porphyry copper exploration projects located in Arizona's prolific Laramide-age copper province. For more information on Copper Fox's mineral properties and investments, visit the Company's website at .

On behalf of the Board of Directors

Elmer B. Stewart
President and Chief Executive Officer

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