Copper Fox Updates Exploration Model - Preparing Plan of Operations FOR Drilling at Sombrero Butte Porphyry Copper Project
COPPER FOX UPDATES EXPLORATION MODEL -
PREPARING PLAN OF OPERATIONS FOR DRILLING AT
SOMBRERO BUTTE PORPHYRY COPPER PROJECT
Calgary, Alberta– July 23, 2025. Copper Fox Metals Inc. (“Copper Fox” or the “Company”) (TSXV:CUU –
OTCQX:CPFXF – FSE:HPU) and its owned subsidiary, Desert Fox Minerals Co. (“Desert Fox”), are pleased to
present an updated exploration model for its 100% owned Sombrero Butte project. The model integrates data from
the 2024 geophysical and mapping programs, petrographic, mineralogical, geochronological and alteration studies,
whole rock and trace element geochemistry, SWIR and high resolution airborne magnetic and radiometric surveys,
and available public data. The use of trace element ratios and zircon geochemistry was used to distinguish between
prospective (fertile) and non-prospective intrusive phases of the Copper Creek granodiorite.
Elmer B. Stewart, President & CEO of Copper Fox commented: “The data compilation and updating the exploration
model, provides the opportunity to prepare a Plan of Operations to conduct an exploratory drill program to test the
large porphyry target located in the center of the project. The exploration model suggests a “near surface” highly
evolved porphyry copper-molybdenum system exhibiting supergene enrichment of the copper mineralization and
several episodes of high temperature hydrothermal fluids located in the same structural setting as the Copper Creek
porphyry copper deposit to the north.”
Faraday Copper’s Copper Creek porphyry copper deposit and Copper Fox’s Sombrero Butte project are in the
historically productive Copper Creek -Bunker Hill mining district, which contains breccia -pipe-hosted and
porphyry-style copper mineralization, The Copper Creek porphyry copper deposit is located approximately three
kilometers north of the Sombrero Butte project, Figure-1.
Figure-1: Project location map (looking west) showing other porphyry copper deposits in relation to the
exploration target and chargeability anomaly on the Sombrero Butte project.
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Summary
The updated exploration model supports the presence of a large, highly evolved porphyry copper system overlain
by a relatively thin veneer of phyllic-altered andesitic volcanics and volcaniclastic sediment s of the Glory Hole
formation. The Copper Creek intrusive exhibits a diorite to granodiorite evolutionary trend consistent with other
porphyry copper deposits in Arizona with SiO2 contents ranging between 52 to 70% SiO2 consisting primarily of
porphyritic and non -porphyritic phases of hornblende-biotite granodiorite and biotite granodiorite with lesser
amounts of quartz diorite, quartz monzonite and quartz syenite.
The “near surface” porphyry copper target is characterized by quartz vein hosted copper-molybdenum
mineralization that exhibits a strong spatial correlation to a central zone of potassic alteration and laterally
widespread thermal metamorphism and phyllic alteration of the Glory Hole volcanics. The zone of potassic
alteration hosts areas of quartz-magnetite, and magnetite veining (indicative of early potassic alteration) and
prospective hypersaline fluid inclusion s (liquid+vapor+daughter minerals) typically observed in the epizonal
portion of porphyry copper deposits underlain by a coincident strong positive chargeability anomaly hosted in the
Laramide age Copper Creek intrusive (Pb/U zircon ages of 62.97+/-0.01 Ma and 63.08+/-0.01 Ma.) and overlying
Glory Hole volcanics, Figure-2.
Figure-2: Schematic section (looking north-northwest) showing the Updated Exploration Model for the Sombrero
Butte Project. The depth of reliable exploration for the 2024 geophysical survey is limited to 600m below surface.
The anomalous chargeability and low resistivity signatures extend to depth below the 600m depth.
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The updated e xploration model highlights the following features typically seen in Laramide porphyry copper
deposits in Arizona.
• The southern extension of the Copper Creek granodiorite consist s primarily of porphyritic and non -
porphyritic hornblende-biotite granodiorite and biotite granodiorite.
• The porphyry copper target and underl ying 3,200 meter (m) long by 1,300m wide chargeability anomaly
(>25 mrad) occupies the same structural setting as the Copper Creek porphyry copper deposit.
• A central potassic zone surrounded by widespread phyllic ( the Limonite zone ; oxidized quartz-pyrite-
sericite veinlets) and lesser amounts of distal advanced argillic, propylitic and tourmaline alteration.
• Hypogene enrichment (i.e. bornite rimming chalcopyrite) of copper mineralization and magnetite rimming
pyrite indicating several superimposed high temperature hydrothermal events.
• Hypersaline fluid inclusions with liquid + vapor + solid phases of halite, hematite, chalcopyrite and
anhydrite typically observed in epizonal portions of porphyry copper deposits.
• Multiple (120) breccia pipes including magmatic hydrothermal breccia containing high grade copper +/-
molybdenum-gold-silver mineralization.
• Thermal metamorphism of the Glory Hole volcanics suggesting a relatively thin cover of Glory Hole
volcanics overlying the Copper Creek granodiorite intrusive.
General Geology
The geology of the Sombrero Butte project consists of Precambrian age Pinal Schist, Laramide age Glory Hole
volcanics and Copper Creek granodiorite and the Miocene age Galiuro volcanics, Figure-3.
Figure-3: General geology of the Sombrero Butte project and section line for the updated exploration model. The
red line on the map shows line of section for the exploration model shown in Figure-2.
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Structural Setting
The Copper Creek porphyry copper deposit is located between the Holy Joe fault and the Blind Thrust fault.
Modelling of high-resolution magnetic data delineated several north-northwest trending, west dipping (55 to 65),
regional scale magnetic features, three of which exhibit a strong correlation to the Range Front fault, the Blind
Thrust fault and the Holy Joe fault . The porphyry exploration target and chargeability anomaly occupy the same
structural setting on the Sombrero Butte project, Figure-4.
Figure-4: Structural setting of the chargeability anomaly and interpreted regional faults underlying the Sombrero
Butte project.
Petrographic/Mineralogical Studies
These studies identified the following mineralogical and alteration features indicative of a porphyry copper system.
• Widespread potassic (K-spar) alteration and quartz -chalcopyrite-bornite veins associated with the K -spar
alteration.
• Hypogene enrichment evidenced by bornite encroaching inward on core zones of chalcopyrite.
• Sulfide mineralization postdates the thermal metamorphism of the Glory Hole Volcanics.
• Samples where the paragenetic sequence shows later stage magnetite rimming and replacing pyrite, an
unusual pattern, in that porphyry-related hydrothermal systems generally evolve from a low oxidation-
low sulfidation state to high oxidation and sulfidation states.
Fluid Inclusion Studies
Fluid-inclusions in porphyry copper deposits are considered to be indicative of epizonal intrusions which are the
most favorable parents for porphyry copper mineralization and provide direct information about the hydrothermal
fluids that transport metals a nd form deposits. The fluid inclusions identified at Sombrero Butte are a) vapor, b)
liquid+vapor and c) liquid+vapor+daughter minerals. The presence of hypersaline inclusions (liquid+ vapor+
daughter minerals) suggests the intrusive source achieved saturation and phase separation (i.e. “boiling”) into a
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vapor-rich phase and a high salinity brine phase. The locations of samples from the Sombrero Butte project with
hypersaline fluid inclusions are shown in Figure-5.
Figure-5: Distribution of samples used in fluid inclusion studies showing locations of samples with Hypersaline
fluid inclusions. Hypersaline fluid inclusions are restricted to the various phases of the Copper Creek
granodiorite.
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Breccia Systems
Five different styles of breccias occur within the porphyry target at Sombrero Butte. These mineralized and non-
mineralized breccias occur as vertically dipping pipes exhibiting different textural, geochemical associations,
alteration patterns, degrees of leaching, and weak to intense argillic alteration. The Breccia pipes at the northwest
end of the proje ct occur within a n 800m by 800m area within potassic and phyllic altered porphyritic and non -
porphyritic hornblende-biotite granodiorite, biotite granodiorite and Glory Hole volcanics. Several of these breccia
pipes were tested by diamond drilling between 2006 -2008. Selected w eighted average grade for mineralized
intervals from these breccias are shown in Table-1.
Table-1: Selected weighted average grades from 2006-2008 diamond drilling at Sombrero Butte as reported in the
NI 43-101 Technical Report of the Sombrero Butte Project , Pinal County, Arizona, USA , dated May 12, 2010,
prepared by Rodney A. Blakestad, J.D., C.P.G.
Breccia DDH ID From (m) To (m) Interval (m) Cu (%) Mo (%) Au (g/t) Ag (g/t)
Magna SB-02 280 368 88 0.663 0.012 0.009 0.561
Campstool SB-03 430 492 62 0.566 0 0.044 0.100
Sunset SB-05 10 40 30 3.570 0.001 0.005 4.050
Audacious SB-14 0 86 86 1.158 0.001 0.007 0.412
Magna SB-23 276 358 82 0.815 0.003 0.020 0.485
Magna SB-23 446 506 60 1.010 0.022 0.067 3.015
Victors SB-33 4 26 22 1.562 0.004 0.124 5.509
Note: The intervals in the above table are based on drill core lengths and do not represent true thickness of the
mineralized intervals.
Analytical Procedures
Age dating (U/Pb zircon, based on 12 determinations) of samples was performed by the Pacific Centre for Isotopic
and Geochemical Research located in Vancouver, British Columbia (CA-TIMS U-Pb isotopic data). Whole rock
and trace element sample preparation and analytical results were completed by ALS Canada Ltd at its facilities in
Vancouver, British Columbia. Sample analyses utilized ALS’s codes ME-MS61L for trace elements, MS61L-REE
for Rare Earth elements and ME-ICP for Whole Rock element analyses. Historical analytical results from the 2006-
2008 drilling preformed by Bell Copper were generated by Activation Laboratories using Instrumental Neutron
Activation Analyses (“INAA”) and Inductively Coupled Plasma mass spectrometry (“ICP”) analytical techniques.
Both Bell Copper and Activation Laboratories employed various standards and blanks in their respective QA/QC
programs. Vancouver Petrographics located in Langley, British Columbia, prepared the thin sections, completed
cobaltinitrite staining of cut block and provided petrographic descriptions of the thin sections.
Qualified Person
Elmer B. Stewart, MSc. P. Geol., President and CEO of Copper Fox, is the Company’s non-independent, nominated
Qualified Person pursuant to National Instrument 43 -101, Standards for Disclosure for Mineral Projects, has
approved the scientific and technical information disclosed in this news release.
About Copper Fox
Copper Fox is a Canadian resource company listed on the TSX Venture Exchange (TSXV: CUU) focused on copper
exploration and development in Canada and the United States. The principal assets of Copper Fox and its wholly
owned Canadian and United States subsidiaries, being Northern Fox Copper Inc. and Desert Fox Copper Inc., are
the 25% interest in the Schaft Creek Joint Venture with Teck Resources Limited on the Schaft Creek copper-gold-
molybdenum-silver project located in northwestern British Columbia and the 100% ownership of the Van Dyke
oxide copper project located in Miami, Arizona. For more information on Copper Fox’s other mineral properties
and investments visit the Company’s website at copperfoxmetals.com.
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On behalf of the Board of Directors
Elmer B. Stewart
President and Chief Executive Officer
For additional information contact: Lynn Ball (844) 484-2820 or (403) 264-2820, [email protected]
Neither the TSX Venture Exchange nor its Regulation Services Provider (as that term is defined in the policies
of the TSX Venture Exchange) accepts responsibility for the adequacy or accuracy of this release.
Cautionary Note Regarding Forward-Looking Information
This news release contains forward-looking statements within the meaning of the Section 27A of the Securities Act
of 1933 and Section 21E of the Securities Exchange Act of 1934, and forward -looking information within the
meaning of the Canadian securities laws (collectively, “forward -looking information”). Forward -looking
information is identifiable by use of the words “believes,” “may,” “plans,” “will,” “anticipates,” “intends,”
“budgets,” “could,” “estimates,” “expects,” “forecasts”, “projects” and similar expressions, and the negative of such
expressions. Forward-looking information in this news release includes statements regarding; an updated
exploration model; preparation of a Plan of Operations to conduct an exploratory drill program; presence of a large,
highly evolved porphyry copper system.
In connection with the forward-looking information contained in this news release, Copper Fox and its subsidiaries
have made numerous assumptions regarding, among other things: the geological advice that Copper Fox has
received is reliable and is based upon practices and methodologies which are consistent with industry standards;
and the reliability of historical reports . While Copper Fox considers these assumptions to be reasonable, these
assumptions are inherently subject to significant uncertainties and contingencies.
Additionally, there are known and unknown risk factors which could cause Copper Fox’s actual results,
performance, or achievements to be materially different from any future results, performance or achievements
expressed or implied by the forward -looking information contained herein. Known risk factors include, among
others: the updated exploration model may not be accurate; the Plan of Operations may not get completed or filed
as planned; an exploratory drill program may not happen as planned or at all; the presence of a large highly evolved
porphyry copper system may not be as estimated; the financial markets and the overall economy may deteriorate;
the need to obtain additional financing and uncertainty of meeting anticipated program milestones; and uncertainty
as to timely availability of permits and other governmental approvals.
A more complete discussion of the risks and uncertainties facing Copper Fox is disclosed in Copper Fox's
continuous disclosure filings with Canadian securities regulatory authorities at www.sedarplus.ca. All forward -
looking information herein is qualified in its entirety by this cautionary statement, and Copper Fox disclaims any
obligation to revise or update any such forward -looking information or to publicly announce the result of any
revisions to any of the forward -looking information contained herein to reflect future results, events, or
developments, except as required by law.