Copper Fox Reports Positive Results from Solubility Testwork Outlines Plans FOR Van Dyke Copper Project
COPPER FOX REPORTS POSITIVE RESULTS FROM SOLUBILITY TESTWORK
OUTLINES PLANS FOR VAN DYKE COPPER PROJECT
Calgary, Alberta – November 15, 202 3, Copper Fox Metals Inc. (‘Copper Fox’ or the ‘Company’)
(TSXV:CUU) (OTCQX:CPFXF), through its wholly owned subsidiary Desert Fox Copper Inc., is pleased to
provide an update on results of the mineral solubility testwork and commencement of a geotechnical study of the
Gila Conglomerate on its 100% owned Van Dyke in-situ copper recovery (‘ISCR’) project located in the Globe-
Miami Mining District, Gila County, Arizona. The results of the mineralogical study are currently being reviewed
and will be reported when completed.
The mineral solubility/mineralogical testwork was completed to better understand the dissolution rates of the
various copper minerals, the mineralogical variability across the Van Dyke deposit and the chemical changes that
occur due to the leching process.
The geotechnical work is focused on collecting additional data to better characterize the strength of the Gila
Conglomerate to support an updated plan for the decline to access the Van Dyke deposit. The geotechnical work
program will be completed by Call & Nicholas Inc. to determine if additional data is needed to support a Preliminary
Feasibility Study (‘PFS’) level study for the underground development. Highlights of the mineral solubility testwork
are:
Highlights
• Copper recoveries ranged from 8.6% to 96.5% (average 65.1%) in the Oxide zone and from 11.7% to 72.2%
(average 30.4%) in the Transition zone within the 72-hour leach period.
• Recoveries for acid soluble copper (‘ASCu’) ranged from 28.9% to 98.0% (average 81.5%) in the Oxide
zone and from 27.1% to 97.1% (average 59.4%) in the Transition zone within the 72-hour leach period.
• Recoveries for cyanide soluble copper (‘CNCu’) ranged from 0.0% to 72.0% (average 25.1%) in the Oxide
zone and from 0.7% to 37.2% (average 20.8%) in the Transition zone . The CNCu recoveries in some
samples exceed the expected recovery from CNCu soluble copper minerals. The reason for the excess
CNCu recovery, while positive, is being investigated.
• Pregnant Leach Solution (‘PLS’) grades ranged from 0.19 g/l to 15.30 g/l copper. PLS copper grades are
a function of higher total ASCu and CNCu concentrations.
• Call & Nicholas Inc. has been retained to complete the planned geotechnical program.
Elmer B. Stewart, President and CEO of Copper Fox stated, “ The recent permitting and financing of the Florence
Copper Project, located in Florence, Arizona by Taseko Mines Limited, is considered a significant event for other
ISCR projects in Arizona, congratulations to Taseko. The test results for our Van Dyke copper project are positive
and encouraging, indicating rapid solubility of the acid soluble copper minerals and enhanced solubility of the
cyanide soluble copper minerals within the 72-hour leach period. The acid soluble and cyanide soluble copper that
was not recovered within the 72-hour leach period is expected to be recovered over a longer leaching period as is
expected in the in-situ leaching process.”
Van Dyke Deposit
The thickness of the “leach cap” overlying the Van Dyke oxidized copper deposit is characterized by variable
concentrations of clay, hematite, limonite, jarosite and goethite, and typically contains less than 100 parts per
million (‘ppm’) copper and ranges in thickness across the deposit. The Van Dyke copper deposit consists of three
distinctive mineralogical zones: an upper Oxide zone (primarily malachite. azurite, chrysocolla and native copper
(possibly cuprite) ) underlain by a Transition zone ( primarily chalcocite with lesser malachite, chrysocolla and
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azurite) underlain by the primary sulphide zone (primarily chalcopyrite with lesser concentrations of chalcocite and
bornite).
Mineral Solubility Testwork
Understanding the chemical and mineralogical changes that occur from the initial injection of the leaching solution
until recovery of the copper bearing leaching solution (referred to as the PLS) is a fundamental aspect of ISCR
projects. The 65 samples selected for mineralogical /mineral solubility testwork were collected from drillholes
within the Phase I mine plan set out in the 2021 Preliminary Economic Assessment (‘PEA’). The samples are from
the Oxide and Transitional zones and cover the mineralized envelope within the selected drillholes at various acid
soluble copper and cyanide soluble copper grade classes. The results of the solubility testwork (bottle roll tests) are
outlined in Table-1 and Table-2 below. The copper recovery and final PLS copper grades at the end of the 72-hour
leach period show a strong correlation to TCu grade.
Table-1: Copper recovery and PLS grades at the end of the 72-hour leach period.
Grade Range
Total Copper Rec. (%)
Final PLS (g Cu/l)
(TCu%) Min Max Average Min Max Average
<0.10 8.6 74.7 38.3 0.19 0.85 0.46
0.10-0.30 14.1 87.3 51.7 0.41 2.17 1.20
0.30-0.50 25.6 94.3 66.9 2.65 3.68 2.84
>0.50 66.3 96.3 81.3 3.76 15.30 7.75
Table-2: Copper recovery by mineralogical zone and copper species at various grade range.
Mineral Grade Average Total Cu ASCu CNCu
Zone Range (Cu %) TCu % Rec % Rec % Rec %
Oxide <0.10 0.066 58.6 79.0 0
0.1-0.3 0.173 50.6 73.8 13.5
0.3-0.5 0.386 68.6 84.7 35.7
0.5-1.0 0.631 75.6 85.8 29.3
>1.0 1.520 83.9 90.6 53.8
Transitional <-0.10 no samples ns ns ns
0.1-0.3 0.150 41.8 70.8 11.1
0.3-0.5 0.443 18.7 48.7 11.7
0.5-1.0 0.723 25.7 53.2 32.2
>1.0 1.280 42.7 74.4 22.9
Notes: TCu=total copper content in sample; PLS=leach solution; g Cu/l= grams of copper contained in 1 liter of
leach solution (PLS); ASCu=acid soluble copper; CNCu=cyanide soluble copper.
It is expected that the remainder of the copper contained in the acid soluble copper minerals (malachite, azurite,
chrysocolla, cuprite) with additional copper recovery from chalcocite would be recovered over a longer leach period
as is typical in ISCR operations.
Geotechnical Program
The development of the Van Dyke copper project contemplates access by way of a decline to a depth of
approximately 30-40 meters above the Gila Conglomerate/leach cap contact and advancing an underground ramp
in the Gila Conglomerate above the leach cap overlying the Van Dyke deposit. The planned geotechnical program
consists of logging of the Gila Conglomerate in six drillholes to collect geomechanical and structural orientation
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data for ground support analyses and decline and ramp design, identify potential areas of concern and to assist with
geotechnical domaining and evaluate ground support requirements. The data to be collected includes Rock quality
designation (‘RQD’), Fracture frequency, Q` data – joint number (‘Jn’), joint roughness (‘Jr’), and joint alteration
(‘Ja’), and Hardness ‘(ISRM’) on broken and whole core. Previously collected acoustic televiewer data (‘ATV’)
from the six drillholes will be reviewed to support the geochemical data.
On completion of the planned testing program, a data gap evaluation will be completed for all available geotechnical
and hydrogeological data from the Van Dyke project to determine if additional data is needed to support a PFS level
study.
Analytical Procedures
The mineral solubility/mineralogical testwork (QEMSCAN) was completed by Base Met Labs US LTD ( ‘BML’)
located in Tucson, Arizona and at BML’s Kamloops, British Columbia facility. Sample preparation for the mineral
solubility (bottle roll) tests consisted of stage crushing 100 percent of the sample to passing 10 mesh (1.70 mm) and
split into 1-kilogram test samples. The prepared samples were then subjected to a 72-hour leach period, evaluating
copper recovery and acid consumption under the following leaching conditions: 1) 45 % Solids, 2) 1.8 pH (adjusting
pH every day to make sure free acid is available for leaching), 3) sampling of the pregnant leach solutions (‘PLS’)
at 2,4,6,8,24,48 and 72 hours, 4) the PLS was analyzed for Cu, Fe, pH, ferrous iron (Fe++) and ferric iron (Fe+++).
A 50-gram sample from each leached residue was submitted for Cu, Fe and SeqCu analysis.
A 100-gram sample was separated (riffled out) from each of the 1-kilogram samples and pulverized for QEMSCAN
analysis using the BMA (Bulk Mineral Analysis) to provide; 1) Modal Mineralogy and Abundance (including
copper speciation), 2) Copper Deportment, and 3) QEMSCAN vs Assay Reconciliation.
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, and has
reviewed and approves the scientific and technical information disclosed in this news release.
About Copper Fox
Copper Fox is a Tier 1 Canadian resource company focused on copper exploration and development in Canada and
the United States. The principal assets of Copper Fox and its wholly owned subsidiaries, being Northern Fox
Copper Inc. and Desert Fox Copper Inc., are the 100% ownership of the Van Dyke oxide copper project located in
Miami, AZ, the 100% interest in the Mineral Mountain and Sombrero Butte porphyry copper exploration projects
located in Arizona, the 25% interest in the Schaft Creek Joint Venture with Teck Resources Limited on the Schaft
Creek copper -gold-molybdenum-silver project and the 100% owned Eaglehead polymetallic porphyry copper
project each located in northwestern British Columbia. For more information on Copper Fox’s mineral properties
and investments visit the Company’s website at http://www.copperfoxmetals.com.
On behalf of the Board of Directors
Elmer B. Stewart
President and Chief Executive Officer
For additional information contact: Jason Shepherd at [email protected] or 1-844-464-2820
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.
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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 include statements about: results from the solubility
testwork; a longer leach period recover ing the remaining copper; and plans for the geotechnical program on the
Gila Conglomerate.
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: completing the planned hydrogeologic program
on time and within budget; the availability of service providers; the geological, metallurgical, engineering, financial
and economic advice that Copper Fox has received is reliable and is based upon practices and methodologies which
are consistent with industry standards; and the stability of economic and market conditio ns. 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 copper not recovered within the 72 hour leaching period may not be recovered; the mineralogical tests
may not return the desired results or be completed as planned or at all; the geotechnical tests may not be completed
as planned or at all; uncertainties relating to interpretation of the previous results; the overall economy may
deteriorate; uncertainty as to the availability and terms of future financing; fluctuations in commodity prices and
demand; currency exchange rates; 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.sedar.com. 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.