Copper Fox Intersects Porphyry Copper System at Mineral Mountain
COPPER FOX INTERSECTS PORPHYRY COPPER SYSTEM AT MINERAL MOUNTAIN
Calgary, Alberta – April 7, 2026. Copper Fox Metals Inc. (“Copper Fox” or the “Company”)
(TSXV:CUU | OTCQX:CPFXF | FSE:HPU) and its wholly owned subsidiary, Desert Fox Mineral
Mountain Co. (“ Desert Fox ”), are pleased to report that diamond drillhole (DDH) MM-01-2025
intersected the outer propylitic zone of a blind porphyry copper system. The overlapping, mixed
assemblages of early stage, high temperature chalcopyrite -bornite-molybdenite veins with early
potassic and later sericitic envelopes and lower temperature pyrite -epidote-chlorite veins with sericitic
and propylitic envelopes indicate the broad spectrum of hydrothermal temperature and oxidization
conditions in an evolved porphyry copper system exhibiting several phases of copper and molybdenum
mineralization and indications of hypogene enrichment.
Elmer B. Stewart, President, and CEO of Copper Fox, stated, “ Results indicate that DDH MM-01-2025
intersected the shoulder of the porphyry copper system and advanced our understanding of the
relationship between the porphyry footprint, the buried chargeability anomaly , and the possible location
of the yet undrilled core of the porphyry system . Drillhole MM -02-2025 located approximately 1.3
kilometers (km) northeast of DDH MM -01-2025 is in progress evaluating another portion of the large,
open-ended chargeability anomaly underlying the porphyry footprint. Petrographic studies, whole rock
analysis and age dating of the intrusive phases in DDH MM-01-2025 to further define this portion of the
porphyry system are planned.”
Highlights
• The multiple assemblages of copper (Cu), copper -molybdenum (Cu-Mo) and molybdenum (Mo)
veins and associated gangue minerals represent both proximal and distal styles of porphyry
copper mineralization typically observed in the outer margin of a porphyry copper system.
• The upper portion of the drillhole exhibits weak phyllic altered porphyritic biotite -hornblende
granodiorite that transitioned to propylitic altered fine grained biotite granodiorite to the end of
the hole.
• The presence of early -stage high temperature indicator minerals (powellite -scheelite), vein
alteration envelopes and pervasive late -stage calcium metasomatism (fluorescent red calcite)
represent the range of temperature conditions typically seen in porphyry copper systems.
• The Cu, Cu -Mo and Mo mineralization occurs in quartz veins with subordinate amounts in
fractures and as disseminations in the alteration envelopes and surrounding wall rock. The
angle to core axis measurement of the mineralized veins suggests the core of the porphyry is
located to the east of DDH MM-01-2025.
• The drillhole intersected eight intervals of metal enrichment. Cu concentrations within these
intervals range from 200 to 2,887 parts per million (ppm) (0.288%), Mo concentrations range
from 5 to greater than 1,000 ppm (0.10%), and silver (Ag) concentrations range from 1 ppm to
18.2 ppm.
The Mineral Mountain project is located on a prolific northeast trending porphyry copper belt
approximately 25km southwest of Rio Tinto and BHP’s giant Resolution porphyry copper -molybdenum
deposit and approximately 20km northeast of the recently commissioned Florence ISCR copper mine
(Figure-1).
2
Figure-1: Regional setting of the Mineral Mountain porphyry copper project on NE trending porphyry copper belt
Lithologies
Porphyritic medium grained biotite-hornblende granodiorite occurs from surface to a core depth of 348
meters (m) . The interval from 348.57 to 377.2m consists of late -stage post mineralization intrusive
dikes (earliest to latest) crowded dark Quartz -Feldspar porphyry and light green, weakly porphyritic
Quartz Feldspar porphyry. Several thin porphyritic Quartz Feldspar porphyry dikes occur throughout
the drillhole. The lower portion of the hole (377.2 to 847m) intersected fine grained biotite hornblende
granodiorite underlain by a 5m thick hybrid zone marking the intrusive contact between a diorite and the
PreCambrian age Pinal Schist.
Analytical Results
Laramide age porphyry copper systems typically contain Cu-Mo-Ag and typically low concentrations of
gold (Au). Table-1 shows the intervals of metal enrichment and the weighted average concentration of
Cu-Mo and Ag for selected intervals from within the metal enrichment intervals. Figure-2 shows a
schematic representation of the Cu and Mo concentrations in DDH MM -01-2025. Selected samples
with variable Cu concentrations were submitted for Au analyses and returned Au values between 5 to
71 parts per billion (ppb). Cu and Au show a positive correlation whereas Mo exhibits a negative
correlation with Au. Samples with greater than 1,000ppm Mo will be submitted for re -analyses to
determine the actual Mo concentration.
Between the intervals of metal enhancement, multiple, sporadic quartz -copper, quartz -copper-
molybdenum and quartz-molybdenum veins occur. Sporadic quartz-pyrite veins and fracture-controlled
pyrite occurs sporadically from 369 to 475m.
3
Table-1: Weighed average metal concentrations of selected intervals with intervals of metal enrichment.
MEI (from - to in meters) From (m) To (m) Int. (m) Cu (ppm) Mo (ppm) Ag (ppm) Comments
Interval 1 (14 - 34m) 20.00 26.00 6.00 481 34.0 0.52
Interval 2 (61 - 68m) 61.00 68.00 7.00 654 8.2 2.06 1 sample yielded 10ppm Ag
Interval 3 (111 - 118m) 113.00 118.00 5.00 553 204.6 1.30 1 sample > 1000ppm Mo
Interval 4 (124 - 176m) 124.00 125.00 1.00 1179 100.0 4.20
Interval 4 (124 - 176m) 130.00 131.00 1.00 1765 30.7 1.10
Interval 5 (187 - 211m) 200.00 211.00 11.00 435 4.5 1.48
Interval 6 (269 - 299m) 283.00 293.00 10.00 526 64.3 0.71
Sporadic qtz-cpy-bn-mo veins 399.00 400.00 1.00 2840 446.0 2.60
Sporadic qtz-cpy-mo veins 479.00 480.00 1.00 1065 2.1 18.30
Interval 7 (591 to 593m) 591.00 593.00 2.00 1430 >1000 7.25 1 sample yielded 11ppm Ag
Interval 8 (616 to 648m) 622.00 635.00 13.00 613 7.2 2.03
Notes: MEI = metal enrichment interval, Cu = copper, Mo = molybdenum, Ag = silver, ppm = parts per million, m = meters
True thickness/widths of the mineralization are unknown.
For purposes of this news release, metal concentration of greater than 200ppm Cu, 5ppm Mo and
1ppm Ag are considered significant. Average background concentrations for Cu in non -mineralized
intervals are 50ppm, Mo 0.7ppm and Ag 0.3ppm. A total of 77 samples returned Cu concentrations
ranging from 200 to 2,880ppm (0.228%), 54 samples ranging from 5 to greater than 1,000ppm (0.10%)
Mo and 57 samples ranging from 1 to 18.3ppm Ag occur within the hole.
Figure-2: Schematic section showing lithologies and analytical results superimposed on chargeability pseudo -section in DDH
MM-01-2025. Cu scale capped at 1,000ppm and Mo scale capped at 200ppm for illustrative purposes.
4
Vein Assemblages
The Cu, Cu-Mo and Mo mineralization occurs primarily in quartz veins with subordinate amounts
occurring on fractures and as disseminations in the alteration envelopes surrounding quartz veins. The
vein types observed in DDH MM-01-2025 include: qtz-kspar-cpy-bn, qtz-cpy-bn-mo, qtz-mo+/- py, qtz-
cpy+/- epi, as well as qtz -mag, qtz -kspar-py, qtz -hem-cal, py +/ -epi-chl. and discrete epidote and
chlorite veinlets. The age relationships between the vein sets have not been established. Photographs
of the Cu-Mo mineralization in DDH MM-01-2025 are shown below.
Qtz-cpy veinlet @ 88.30m Qtz-mo veinlet @ 420.54m
Qtz-cpy-bn veinlet @200.27m Qtz-kspar-cpy-bn-mo veinlet @479.60m
Notes: qtz=quartz, cpy -chalcopyrite, bn=bornite, mo=molybdenite, kspar=hydrothermal potassium feldspar, hem=hematite
(after magnetite), mag=magnetite, py=pyrite, epi=epidote, cal=calcite, chl=chlorite).
Alteration
The upper portion of DDH MM-01-2025 exhibits pervasive weak to moderate sericitic alteration that
overprints sporadic, early stage kspar alteration. The core interval from 600 to 800m marks the
interpreted outer edge of the propylitic alteration halo around the yet undrilled core of the porphyry
system. Early-stage high temperature minerals include s poradic vein hosted scheelite and powellite
5
mineralization. Late -stage mineralization includes moderate to intense calcium metasomatism shown
by the presence of fluorescent red calcite.
DDH MM-02-2025 Update
DDH MM-02-2025 is located approximately 1.3km northeast of DDH MM-01-2025 (see Figure-3) and is
testing the northeast extension of the chargeability/resistivity anomaly outlined in 2024. The drillhole is
in progress and information on this drillhole will be made available when the drillhole has been
completed and analytical results received.
Figure-3: Mineral Mountain Project Drill Hole location map superimposed on copper-molybdenum mineralization and 400m
depth slice (below surface) of the 14mrad chargeability anomaly.
Drillhole Information
DDH ID Easting Northing Elev (masl) Dip (deg) Azi (deg) Depth (m)
MM-01-2025 477580 3667582 618 -75 290 860.7
MM-02-2025 478660 3667905 663 -85 180 drilling
6
Drilling and Sampling Procedures
The upper 396.83m portion of DDH -01-2025 was completed using HQ rods before reducing to NQ
diameter rods. Overall core recovery was estimated to be greater than 95%. After cutting with a
diamond saw, one half of the core was collected for sample preparation and analysis, and the other half
was retained onsite for future reference. Sample intervals selected do not cross lithological boundaries
and ranged from 1.00 to 3.00m in length depending on the presence of Cu and/or Mo mineralization.
Quality Control (QA/QC)
Copper Fox follows a rigorous Quality Assurance/Quality Control program. A total of 396 core samples
were submitted as part of the drill core analysis including 7 split-core duplicates, 17 commercial
certified reference material (CRM) standards, and 34 blanks. The matrix material of the CRM’s
matches the Mineral Mountain geology. All standards are certified for 4-acid digestion.
Skyline Assayers and Laboratories Inc. (Accreditation 2953.01 and Standard ISO/IEC 17025:2017)
located in Tucson Arizona completed the sample preparation and analysis for the Mineral Mountain
samples. Samples were prepared using preparation code SP -1 - Crush to plus 75% -10 mesh, split
and pulverize with standard steel to plus 95% -150 mesh. Analytical code TE -7 – was used for Trace
Elements by Multi Acid (with HF), Ag, As, Hg, Sb, Se, Te concentrations were determined by Aqua
Regia, ICP-OES/ICP-MS (49 elements)
Qualified Person
Elmer B. Stewart, MSc. P.Geo., 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, and has reviewed and approves 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 -size copper mine 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 and the Sombrero Butte and Mineral Mountain advanced exploration
stage porphyry copper projects located in the prolific Laramide age copper province in Arizona. For
more information on Copper Fox’s mineral properties and investments visit the Company’s website at
www.copperfoxmetals.com.
For additional information contact: Lynn Ball at 1-844-464-2820 or [email protected].
On behalf of the Board of Directors
Elmer B. Stewart
President and Chief Executive Officer
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.
7
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 generally 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; results of DDH MM-01-2025; a porphyry copper
system; porphyry style mineralization and alteration ; quartz vein hosted copper and molybdenum
mineralization and interpreted Laramide age intrusive rocks.
In connection with the forward -looking information contained in this news release, Copper Fox and its
standards 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 results of DDH MM -01-2025 may not represent a porphyry copper
system; the porphyry style mineralization and alteration may not be indicative of or represent a
porphyry copper system ; the intrusive rocks may not be of Laramide age; further exploration may not
locate additional porphyry style mineralization, the financial markets and the overall economy may
deteriorate; the need to obtain additional financing and uncertainty as to effects of threatened tariffs,
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.