Goldcliff Confirms Potential for Non-Cyanide Gold Recovery at Panorama Ridge

Rhea-AI Summary

Goldcliff (OTC:GCFFF) reported initial metallurgical test results from Panorama Ridge showing the project's York-zone drill-core composite (0.74 g/t Au) achieved 88% gold recovery after thermal oxidation and one hour of Dundee Sustainable Technologies' patented CLEVR™ non-cyanide leach.

The CLEVR workflow produced an inert, sulphide-depleted residue that passed TCLP thresholds and operates as a closed-circuit, zero-effluent system, potentially removing the need for cyanide and a conventional tailings pond. Dundee recommended further laboratory work to refine pre-treatment and recovery characteristics.

Positive

• 88% gold recovery from York-zone composite after CLEVR leach
• Composite grade tested at 0.74 g/t Au before leach
• Residue passed TCLP and is described as inert and non-acid-generating
• CLEVR process is closed-circuit, zero-effluent (no cyanide)

Negative

• Results are preliminary and require additional test work and optimization
• Composite grade of 0.74 g/t Au is modest and may limit economics without scale or higher grades
• Goldcliff-qualified person is a company director and non-independent

Argus Dec 8 session

-8.79% close to close 0.0x rel. volume Open Argus

Details

News Market Reaction – GCFFF

On Dec 8, the day this news came out, GCFFF closed 8.79% below the previous close.

Data tracked by StockTitan Argus for the Dec 8 session.

Key Figures

Gold recovery: 88% Sample grades range: 0.2–2.5 g/t Au Composite grade: 0.74 g/t Au +5 more

Gold recovery

88%

York-zone composite using CLEVR with thermal oxidation

Sample grades range

0.2–2.5 g/t Au

Six York-zone drill-core samples at Panorama Ridge

Composite grade

0.74 g/t Au

Blended York-zone composite before thermal oxidation

Post-oxidation grade

0.71 g/t Au

Composite after thermal oxidation pre-treatment

CLEVR leach time

1 hour

Duration of CLEVR leaching that yielded 88% recovery

York-zone samples

6 samples

Drill-core samples used to create CLEVR test composite

Price change 24h

-20.28%

Move in GCFFF around the metallurgical test news

52-week range

$0.006–$0.0914

GCFFF 52-week low and high prior to this news

Historical Context

5 past events · Latest: Dec 08

5 events

1. Dec 08

   Metallurgy update

   24h Move

   -8.8%

   Reported 88% gold recovery using CLEVR non-cyanide process at Panorama Ridge.

2. Nov 19

   Project sampling

   24h Move

   -11.1%

   Expanded North Cliff Zone at Kettle Valley with 28 rock samples submitted.

3. Nov 10

   Private placement

   24h Move

   -6.1%

   Closed second tranche issuing 1,000,000 flow-through shares for $70,000.

4. Oct 30

   Private placement

   24h Move

   -14.1%

   Closed first tranche with 1,900,000 flow-through shares for $133,000.

5. Oct 20

   Offering announcement

   24h Move

   -14.2%

   Announced unit and flow-through offerings to raise up to $730,000.

24h Move is the share-price change in the day after each event; other market factors may also have contributed.

Key Terms

non-cyanide gold recovery, thermal oxidation, closed-circuit, zero-effluent, +3 more

7 terms

non-cyanide gold recovery technical

"gold mineralization from Panorama Ridge may be amenable to Dundee's patented CLEVR™ non-cyanide gold recovery process"

Non-cyanide gold recovery describes methods for extracting gold from ore or tailings that do not use cyanide, instead relying on alternative chemicals, microbes or physical separation—think using a milder cleaning solution instead of bleach. It matters to investors because these approaches can lower environmental and regulatory risk, reduce potential cleanup costs and community opposition, and affect operating expenses and the long-term value and permitting prospects of a mining project.

thermal oxidation technical

"achieved 88% gold recovery using the CLEVR process with a thermal oxidation pre-treatment"

Thermal oxidation is a process that uses high heat to combine a material with oxygen, changing its surface or breaking down unwanted compounds; think of it as controlled ‘cooking’ that converts substances into a more stable oxide or into gases that can be captured. Investors care because it affects product performance, manufacturing yields, regulatory emissions and operating costs — decisions about equipment, compliance and efficiency can materially influence a company’s expenses and revenue.

closed-circuit technical

"a key feature of the CLEVR process is its closed-circuit, zero-effluent design"

A closed-circuit system transmits video, audio, or data only within a limited, controlled network rather than broadcasting it to the public. Think of it as a private phone line or internal delivery pipe: only authorized cameras, monitors or recipients can see the feed. Investors care because closed-circuit setups protect assets, ensure regulatory compliance, limit liability and control sensitive information — all factors that affect operational risk and costs.

zero-effluent technical

"a key feature of the CLEVR process is its closed-circuit, zero-effluent design"

Zero-effluent describes a process, plant, or facility designed so that it discharges no liquid waste into the environment, often by recycling, treating and reusing all wastewater on site. For investors this signals lower regulatory and pollution risk, potential savings on disposal costs, and possible capital or operating trade-offs — like a factory that reuses every drop of water so nothing flows down the drain, reducing long-term liabilities and compliance exposure.

Toxicity Characteristic Leaching Procedure regulatory

"A Toxicity Characteristic Leaching Procedure ("TCLP") completed on the residue confirmed"

A toxicity characteristic leaching procedure (TCLP) is a standardized lab test that simulates how a waste material would release harmful chemicals into groundwater by mixing and extracting it with a specific liquid; think of it as shaking a sample in water to see what dissolves out. Investors should care because a failing TCLP can trigger hazardous-waste classification, leading to higher cleanup and disposal costs, regulatory penalties, restricted land use and reduced asset or project values.

TCLP regulatory

"confirmed that all monitored elements were below TCLP thresholds"

TCLP stands for Toxicity Characteristic Leaching Procedure, an environmental lab test that simulates rainwater passing through a waste material to see which harmful chemicals might wash out. Think of it like shaking a container to see what leaks—if dangerous substances leach above regulatory limits, the material is classified as hazardous waste. Investors care because a hazardous designation can trigger higher disposal costs, cleanup liabilities, permit delays and regulatory fines that affect a company’s expenses, operations and risk profile.

non-acid-generating technical

"The solid residue produced is inert, sulphide-depleted, and non-acid-generating"

Non-acid-generating describes rock, soil, or mining waste that, based on chemical testing, is unlikely to produce acidic runoff when exposed to air and water. For investors, it indicates lower environmental cleanup costs, smaller regulatory and reputational risks, and less need for long-term water treatment—similar to buying a house with a well-sealed roof rather than one that will leak and cause expensive repairs over time.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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VANCOUVER, BC / ACCESS Newswire / December 8, 2025 / George Sanders, President of Goldcliff Resource Corporation ("Goldcliff" or the "Company") (TSXV:GCN)(OTC PINK:GCFFF), reports that recent metallurgical test work by Dundee Sustainable Technologies indicates that gold mineralization from Panorama Ridge may be amenable to Dundee's patented CLEVR™ non-cyanide gold recovery process.

Initial results are encouraging. Testing of York-zone drill core achieved 88% gold recovery using the CLEVR process with a thermal oxidation pre-treatment. While these results are preliminary and additional test work and optimization will be required, management considers the outcome positive enough to continue evaluating this innovative and environmentally responsible processing option.

In September, several drill-core samples representing a range of grades, lithologies, and mineralized zones were collected from Panorama Ridge. Six samples from the York zone-grading from 0.2 g/t Au to 2.5 g/t Au and spanning two lithologies-were crushed and blended into a composite grading 0.74 g/t Au. Following thermal oxidation, the composite tested at 0.71 g/t Au. After one hour of CLEVR leaching, an 88% gold recovery was recorded.

Dundee explains in their report to Goldcliff that a key feature of the CLEVR process is its closed-circuit, zero-effluent design. The solid residue produced is inert, sulphide-depleted, and non-acid-generating. A Toxicity Characteristic Leaching Procedure ("TCLP") completed on the residue confirmed that all monitored elements were below TCLP thresholds. By removing the requirement for cyanide and avoiding the need for a conventional tailings pond, CLEVR offers the potential for lower environmental risk and a reduced surface footprint.

Dundee has recommended additional laboratory work to better define material concentration behaviour, pre-treatment requirements, and gold recovery characteristics. Goldcliff anticipates continued collaboration with Dundee Sustainable Technologies as it works to further evaluate the potential of the Panorama Ridge gold project.

Paul Saxton, P. Eng, qualified person as defined by National Instrument 43-101 supervised the preparation and verification of the technical information contained in this release. Mr. Saxton is a Company Director and non-independent.

For further information, please contact George W. Sanders, President, at 250-764-8879, toll free at 1-866-769-4802 or email at sanders@goldcliff.com.

GOLDCLIFF RESOURCE CORPORATION

Per: "George W. Sanders"

George W. Sanders, President

Neither TSX Venture Exchange nor its Regulation Service Provider (as that term is defined in the policies of the TSX Venture Exchange) accept responsibility for the adequacy or the accuracy of this news release.

SOURCE: Goldcliff Resource Corp.

View the original press release on ACCESS Newswire

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What gold recovery did Goldcliff report for Panorama Ridge (OTC:GCFFF) on December 8, 2025?

Goldcliff reported an 88% gold recovery from a York-zone composite using thermal oxidation plus the CLEVR™ non-cyanide leach.

What grade was the Panorama Ridge York-zone composite tested by Goldcliff (OTC:GCFFF)?

The crushed and blended York-zone composite graded 0.74 g/t Au before leaching and tested at 0.71 g/t Au after thermal oxidation.

Does the CLEVR process used at Panorama Ridge (OTC:GCFFF) avoid cyanide and tailings ponds?

Dundee's CLEVR process is described as a closed-circuit, zero-effluent non-cyanide method that can produce inert, sulphide-depleted residue, potentially avoiding conventional tailings ponds.

What further work did Goldcliff (OTC:GCFFF) say is needed after initial CLEVR results?

Dundee recommended additional laboratory work to define material concentration behaviour, pre-treatment requirements, and gold recovery characteristics.

Did the Panorama Ridge residue meet environmental leachability tests for Goldcliff (OTC:GCFFF)?

Yes; a Toxicity Characteristic Leaching Procedure (TCLP) on the residue showed monitored elements below TCLP thresholds.