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Copper Fox Metals Inc
Symbol CUU
Shares Issued 548,902,163
Close 2023-11-14 C$ 0.17
Market Cap C$ 93,313,368
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Copper Fox begins geotechnical study on Van Dyke

2023-11-15 12:07 ET - News Release

Mr. Elmer Stewart reports

COPPER FOX REPORTS POSITIVE RESULTS FROM SOLUBILITY TESTWORK OUTLINES PLANS FOR VAN DYKE COPPER PROJECT

Copper Fox Metals Inc. has provided an update on results of the mineral solubility testwork and commencement of a geotechnical study of the Gila conglomerate on its 100-per-cent-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:

HighlightsCopper 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 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.

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 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.

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