Mayfair Gold advances Fenn-Gib toward 2028 build

Rhea-AI Filing Summary

Mayfair Gold Corp. (MINE) reports progress on its 2026 summer exploration and mine geology program at the 100%-owned Fenn-Gib gold project in Northern Ontario, advancing targets and confirming infrastructure locations outlined in its 2026 Pre-Feasibility Study.

The company advanced South Block targets toward drill-ready status, mapped over 95% of known outcrops, and collected 127 grab samples across the North and South blocks. A condemnation drilling program of 23 holes totaling 6,184 metres confirmed that proposed locations for key project infrastructure remain suitable, so no changes to the current site layout are required.

Mayfair is building an integrated 3D geological and multi-element geochemical model, supported by over 900 ICP-MS assays and acid-based accounting assays to aid environmental baseline work. Fenn-Gib hosts an indicated mineral resource of 4.3 million ounces of gold (181.3 Mt at 0.74 g/t) and a probable mineral reserve of 1.0 million ounces (25.1 Mt at 1.29 g/t). The PFS outlines initial development capital of C$450 million, a base-case payback period of 2.7 years, and cumulative free cash flow of US$896 million over the first six years of production at a US$3,100/oz gold price, with construction targeted for 2028 and initial production in 2030.

Positive

• Fenn-Gib PFS economics appear robust, with initial development capital of C$450 million, a base-case payback of 2.7 years, and projected cumulative free cash flow of US$896 million over the first six years of production at a US$3,100/oz gold price.

Negative

• None.

Key Figures

Condemnation drill holes: 23 holes Condemnation drilling length: 6,184 metres Grab samples collected: 127 samples +5 more

8 metrics

Condemnation drill holes 23 holes 2026 condemnation drilling program at Fenn-Gib

Condemnation drilling length 6,184 metres Total metres drilled in 2026 condemnation program

Grab samples collected 127 samples 2026 exploration program across North and South blocks

ICP-MS assays Over 900 assays Assays taken in and around the main Fenn-Gib deposit

Indicated mineral resource 4.3 million ounces of gold 181.3 Mt at 0.74 g/t at Fenn-Gib

Probable mineral reserve 1.0 million ounces of gold 25.1 Mt at 1.29 g/t near surface at Fenn-Gib

Initial development capital C$450 million Estimated in 2026 Pre-Feasibility Study for Fenn-Gib

Projected cumulative free cash flow US$896 million First six years of production at US$3,100/oz gold price

Key Terms

condemnation drilling, Pre-Feasibility Study, indicated mineral resource, probable mineral reserve, +2 more

6 terms

condemnation drilling technical

"completed its 2026 condemnation drilling program, comprising 23 drill holes"

Condemnation drilling is the targeted boring of holes to test soil or rock on a specific parcel of land to see if it contains contamination, voids, or material that would make part of the site unusable or unsafe. Think of it like lifting a few floorboards to check for rot before deciding which rooms in a house can be rented out. Investors care because the results determine whether portions of a property must be set aside, cleaned up, or dropped from development plans, which directly affects costs, timelines and the value of a project.

Pre-Feasibility Study financial

"identified in the 2026 Pre-Feasibility Study Technical Report"

A pre-feasibility study is an initial assessment that evaluates whether a proposed project or investment idea is worth exploring further. It involves examining basic factors like costs, potential benefits, and possible challenges, similar to conducting a preliminary check before deciding to invest more time and resources. This helps investors determine if pursuing the project further is practical and likely to be successful.

indicated mineral resource financial

"Fenn-Gib hosts a 4.3 million ounce indicated mineral resource of gold"

A quantified portion of a mineral deposit where geological evidence and sampling give a reasonable level of confidence in the quantity, grade and continuity of the minerals — think of it as a well-marked stretch on a treasure map rather than a vague hunch. It matters to investors because it provides a credible estimate that can be used for preliminary economic studies and valuation, reducing uncertainty compared with less-certain resource categories.

probable mineral reserve financial

"targeting the higher-grade 1 million ounce probable mineral reserve"

A probable mineral reserve is the portion of a mineral deposit that geologists and engineers judge likely to be economically mineable based on available data and reasonable assumptions about extraction, costs and market conditions; it carries a moderate level of confidence, higher than a resource estimate but lower than a proven reserve. Investors care because it represents the amount of commodity a company can reasonably expect to convert into saleable product—like a cautiously optimistic shopping list that helps estimate future production, revenue and project risk.

inductively coupled plasma mass spectrometry technical

"over 900 inductively coupled plasma mass spectrometry assays (ICP-MS)"

A laboratory technique that turns a sample into a hot gas, charges its atoms, and then separates and counts those charged particles to measure tiny amounts of metals and other elements. Think of it as a very precise metal detector that can tell not only what metals are present but exactly how much of each is there. Investors care because it underpins product quality, environmental compliance, contamination testing and resource assays—areas that can affect costs, fines, sales and the value of raw materials.

NI 43-101 regulatory

"Qualified Persons as defined by National Instrument 43-101"

A Canadian regulatory standard that sets the rules for how mining and exploration companies must report mineral resources and reserves, requiring technical reports prepared or signed off by an independent, certified expert. It matters to investors because it creates a consistent, transparent “inspection report” for mining projects, making it easier to compare prospects, judge the reliability of claims, and assess geological and financial risk before investing.

FAQ

What did Mayfair Gold (MINE) report about its 2026 summer exploration program at Fenn-Gib?

Mayfair Gold reported that its 2026 program advanced South Block targets toward drill-ready status, mapped over 95% of known outcrops, collected 127 grab samples, and integrated new geological and structural data to refine future drilling and exploration targeting.

How many condemnation drill holes did Mayfair Gold complete in 2026 and what was the outcome?

Mayfair completed 23 condemnation drill holes totaling 6,184 metres. The results confirmed that the tested locations for key project infrastructure remain suitable, and no changes to the current site layout identified in the 2026 Pre-Feasibility Study are required.

What mineral resources and reserves does the Fenn-Gib Project currently host for Mayfair Gold (MINE)?

Fenn-Gib hosts an indicated mineral resource of 4.3 million ounces of gold (181.3 Mt at 0.74 g/t) and a probable mineral reserve of 1.0 million ounces (25.1 Mt at 1.29 g/t), providing a resource base for the planned mine development strategy.

What are the key economic metrics from Mayfair Gold’s Fenn-Gib Pre-Feasibility Study?

The PFS outlines initial development capital of C$450 million, a base-case payback period of 2.7 years, and projected cumulative free cash flow of US$896 million over the first six years of production, assuming a US$3,100/oz gold price.

What is the expected development timeline for Mayfair Gold’s Fenn-Gib Project?

Mayfair is advancing permitting, detailed engineering, and stakeholder engagement with the goal of starting construction in 2028 and achieving initial production in 2030, as outlined in the 2026 Pre-Feasibility Study.

How is Mayfair Gold enhancing its geological and geochemical understanding at Fenn-Gib?

Mayfair is building a 3D geological and multi-element geochemical model, supported by over 900 ICP-MS assays and acid-based accounting assays. This work is intended to strengthen geo-metallurgy, support environmental baseline studies, and guide property-scale exploration.

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

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Available on EDGAR 09/08/2026 - 02:29 PM Accepted by SEC EDGAR 09/08/2026 - 02:29 PM Learn about SEC filing dates

__________________________________________________________________________________________________________________

UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

_____________________________________

FORM 6-K

REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16
UNDER THE SECURITIES EXCHANGE ACT OF 1934

For the month of September 2026

Commission File Number: 001-43060

____________________________________

 

                             Mayfair Gold Corp.                       
(Translation of registrant’s name into English)

489 McDougall Street
           Matheson, Ontario P0K 1N0, Canada          
(Address of principal executive office)

Indicate by check mark whether the registrant files or will file annual reports under cover of Form 20-F or Form 40-F.

☐ Form 20-F          ⌧ Form 40-F

____________________________________________________________________________

- 2 -

DOCUMENTS FILED AS PART OF THIS FORM 6-K

Exhibit	Description
99.1	News Release, dated September 8, 2026

SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

Date: September 8, 2026

Mayfair Gold Corp.

By:/s/ Kevin Annett                            

Name:Kevin Annett 

Title: Chief Financial Officer 

 

MAYFAIR GOLD ADVANCES EXPLORATION TARGETS AND PROJECT GEOLOGY AT FENN-GIB

Toronto, Ontario, September 8, 2026 – Mayfair Gold Corp. (“Mayfair”, “Mayfair Gold”, or the “Company”) (TSXV: MFG, NYSE American: MINE) is pleased to report on its summer exploration program progress and mine geology advancement to further its operational readiness program.

2026 Summer Geology Program Highlights:

·Advanced South Block targets toward drill-ready status 

·Mapped more than 95% of known outcrops and collected 127 grab samples 

·Completed 23 condemnation holes totalling 6,184 metres, confirming the site General Arrangement  

·Advanced the integrated 3D geological and multi-element geochemical model 

Adree DeLazzer, P.Geo, Vice President, Exploration, commented, “this season’s work has strengthened our geological understanding of the North and South blocks and advanced priority targets on the South Block toward planned drilling in early 2027. Integrating our mapping, sampling and structural interpretation will help us refine these targets and focus the next phase of exploration. In parallel, we are developing an integrated geological and geochemical model at Fenn-Gib to better understand the deposit and guide exploration across the broader property. We are encouraged by the South Block’s potential and look forward to testing the targets developed through this work.

2026 Exploration Program

The 2026 exploration program focused on advancing the geological understanding of the North and South blocks (see figures 1 and 2 below) through systematic geological mapping, prospecting, sampling, and compilation of historical data. Over 95% of known outcrops across both blocks were reviewed, mapped and selectively sampled, providing extensive coverage of the property and adding significantly to the geological dataset available for ongoing interpretation and targeting.

A total of 127 grab samples were collected across the North and South blocks, including selected samples for gold assay and multi-element geochemical analysis. Geological and structural observations recorded during fieldwork focused on documenting structural features, lithology, alteration, and mineralization. The results of this work are being integrated with existing historical datasets to build a more complete understanding of the property.

A structural targeting program is also underway and has identified a number of areas for further evaluation. These targets are being integrated with the results of the summer mapping and sampling program to help refine areas for potential follow-up geological, geochemical, and geophysical work.

The Company is currently finalizing plans for its fall and winter exploration programs.

 

Figure 1: North Block

 

Figure 2: South Block

Infrastructure Condemnation Drilling Program

Mayfair has completed its 2026 condemnation drilling program, comprising 23 drill holes totalling 6,184 metres, including two redrills. The program was designed to test the proposed locations of key project infrastructure identified in the 2026 Pre-Feasibility Study Technical Report. The drilling results confirm that the tested locations remain suitable for the planned infrastructure, and no changes to the current site layout are required.

 

Figure 3: Map of Condemnation Drilling Program

Condemnation Program Assay Highlights
Hole-ID	From (Meters)	To (Meters)	Length* (Meters)	Au g/t	Lithology
FGN26-031	51.00	67.75	16.75	0.52	AMV
and	260.00	261.25	1.25	1.28	MV
FGN26-033	178.30	181.00	2.70	2.84	AMV
including	179.70	181.00	1.30	5.41	MV
FGN26-035	87.00	90.00	3.00	0.66	SED
and	296.50	298.00	1.50	0.51	SED
FGN26-036	49.00	50.50	1.50	3.27	SED
FGN26-037	180.90	184.00	3.10	0.64	ASED
including	183.00	184.00	1.00	1.05	ASED
and	271.00	275.00	4.00	0.62	ASED
FGN26-038	198.30	202.50	4.20	1.58	SED
including	201.00	202.50	1.50	3.50	SED
FGN26-039	91.50	92.60	1.10	0.73	SED
FGN26-040	82.50	84.00	1.50	4.45	SED
FGN26-041a	238.50	240.00	1.50	3.64	SED
and	263.00	264.50	1.50	1.11	SED
FGN26-043	224.00	225.50	1.50	0.60	SED
FGN26-048	163.00	164.50	1.50	0.50	SED
and	167.50	169.00	1.50	0.67	SED
FGN26-050	278.00	279.50	1.50	1.14	SED
and	296.00	297.50	1.50	0.52	SED
* True Thickness for condemnation drilling is unknown. Lithology codes: "MV” mafic volcanics; “SED” sediments; denominator “A” denotes altered nature

Condemnation Drilling - Collar Information
Hole ID	Easting	Northing	Elevation	Length (Meter)	Azimuth	Dip
FGN26-030	557334	5375791	326	300	5	-50
FGN26-031	557865	5376070	316	300	340	-50
FGN26-032	558548	5376155	314	300	25	-50
FGN26-033	559084	5375595	312	300	25	-50
FGN26-034	559125	5374660	314	53	0	-50
FGN26-034a	559122	5374662	312	300	0	-50
FGN26-035	558729	5374163	312	300	0	-50

FGN26-036	558739	5374641	313	300	25	-50
FGN26-037	558291	5374722	314	300	0	-50
FGN26-038	557811	5374182	312	301	0	-50
FGN26-039	557799	5374738	315	300	0	-50
FGN26-040	558273	5374186	312	300	0	-50
FGN26-041	557393	5375141	317	72	335	-50
FGN26-041a	557393	5375141	317	300	335	-50
FGN26-042	557397	5374623	316	300	335	-50
FGN26-043	557170	5373775	310	300	335	-50
FGN26-044	559121	5374225	312	187	0	-50
FGN26-045	556964	5374878	317	300	335	-50
FGN26-046	556820	5374402	316	300	335	-50
FGN26-047	556717	5373786	310	300	335	-50
FGN26-048	556284	5374488	316	171	335	-50
FGN26-049	556744	5375186	323	300	335	-50
FGN26-050	556283	5375246	317	300	335	-50
*Coordinates reported in NAD83 Zn 17N

Mine Geology and Geochemical Modelling

Efforts are underway to build a comprehensive 3D model integrating geology and a multi-element database.  To date, over 900 inductively coupled plasma mass spectrometry assays (ICP-MS) have been taken in and around the main Fenn-Gib deposit. Mayfair is continuing to expand the database and model key elements to strengthen the geo-metallurgy model.  The final product will also serve in vectoring pathfinder elements to support exploration efforts on the property scale.

Acid-based accounting assays (ABA) are also being included to further support and strengthen the various environmental baseline studies.

Finally, the previously reported grade control program yielded favorable results (see news release dated June 18, 2026). Mayfair is currently considering options to capitalise on those results and potentially do targeted infill drilling to pursue that program.

Quality Assurance and Quality Control

Mayfair Gold maintains a Quality Assurance/Quality Control (QA/QC) program aligned with NI 43-101 requirements and industry best practices. NQ size surface drilling was carried out by Black Diamond Drilling of Matheson, Ontario, and by Wiijiiwaagan Drilling Limited Partnerships of Haileybury, Ontario, under the supervision of Mayfair Gold’s exploration team. The drill program includes detailed geological logging and systematic sampling of drill core at Mayfair’s secure facility in Matheson, Ontario.

Drill core selected for analysis was cut longitudinally using a diamond‑blade saw. One half of the core was retained in the core box for reference, and the other half was bagged, sealed, and prepared for shipment. Analytical work was completed by Swastika Laboratories Ltd. in Swastika, Ontario. Swastika Laboratories is independent of Mayfair Gold and accredited by the Canadian Association for Laboratory Accreditation Inc. (CALA) and meets the ISO/IEC 17025 standards for gold analysis by fire assay with gravimetric finish and fire assay with flame atomic absorption spectroscopy (FAAS) finish.

Samples were delivered directly to Swastika Laboratories by Mayfair personnel. Samples are crushed to minimum 80% passing 1,700 μm. Samples are then split to obtain a 300–500 g sample using a rotary divider. 300–500 g samples are pulverized to minimum 85% passing 74 μm. Gold assays were completed using a 30‑gram fire assay with FAAS finish. Samples returning gold grades greater than 10 g/t were re‑assayed using a 30‑gram fire assay with gravimetric finish. As part of Mayfair’s QA/QC protocol, one certified reference material (CRM), one coarse blank, and one coarse duplicate sample were inserted into the sequence of every 25 samples. Routine third‑party check assays are also performed.

True thickness for condemnation drilling is unknown.

Mayfair Gold is a Canadian development-stage gold company focused on advancing the 100% controlled Fenn-Gib Project in the Timmins region of Northern Ontario. Fenn-Gib hosts a 4.3 million ounce indicated mineral resource of gold (181.3Mt at an average grade of 0.74 g/t) and the expected strategy outlined in the 2026 Pre-Feasibility Study (the “PFS”)¹ is to develop the project under the provincial permitting process, targeting the higher-grade 1 million ounce probable mineral reserve (25.1Mt at an average grade of 1.29g/t) sitting near-surface, highlighting the optionality and scalability provided by the deposit.  The PFS also outlines the potential to develop Fenn-Gib into a new Canadian gold producer, with initial development capital of C$450 million, a base-case payback period of 2.7 years, and cumulative free cash flow² of US$896 million over the first six years of production based on a US$3,100/oz gold price. The Company is advancing permitting activities, detailed engineering, and stakeholder engagement with the goal of starting construction in 2028 with initial production in 2030. The company also remains focused on exploration around the

¹ Please refer to the technical report entitled “Fenn-Gib Gold Project NI 43-101 Technical Report and pre-Feasibility Study” dated effective December 19, 2025 available on SEDAR+ at www.sedarplus.ca for further details.

² Free cash flow does not have a standardized meaning and may not be comparable to similar

measures presented by other issuers, referred to as non-GAAP financial measures. As the Corporation is not in production, the Corporation does not have historical non-GAAP financial measures nor historical comparable measures under IFRS, and therefore the foregoing prospective non-GAAP financial measures may not be reconciled to the nearest comparable measures under IFRS.

broader land package with the goal of enhancing mineral resource scale and growth opportunities.

The geological information contained in this news release has been reviewed and approved by Adree DeLazzer, P.Geo., Vice President, Exploration of Mayfair, and the remaining technical information has been reviewed and approved by Drew Anwyll, P.Eng., Chief Executive Officer of Mayfair. Ms. DeLazzer and Mr. Anwyll are Qualified Persons as defined by National Instrument 43-101.

Cautionary Note Regarding Forward-Looking Information

This news release contains certain forward-looking information within the meaning of applicable Canadian securities legislation and forward-looking statements within the meaning of applicable United States securities legislation (collectively, “forward-looking information”). The use of the words “will” and “expected” and similar expressions is intended to identify forward-looking information. Forward-looking information in this news release includes, but is not limited to, the expected strategy to develop the project under the provincial permitting process, de-risking of early years’ high-grade feed and cash flow profile, the potential to bring forward higher-grade production, targeting the higher-grade mineral reserve, building and operating the Fenn-Gib Project and all disclosure related to the PFS, including commencement of construction and production. Although Mayfair Gold believes that the expectations reflected in such forward-looking information is reasonable, readers are cautioned that actual results may vary from the forward-looking information. The Company has based the forward-looking information on the Company’s current expectations and assumptions about future events. This information also involves known and unknown risks, uncertainties, and other factors that may cause actual results or events to differ materially from those anticipated in such forward-looking information, including the risks, uncertainties, and other factors identified in the annual information form and Form 40-F of the Company for the year ended December 31, 2025, available under the Company's profiles on SEDAR+ at www.sedarplus.ca and EDGAR at www.sec.gov, respectively. Furthermore, the forward-looking information contained in this news release is as at the date of this news release, and Mayfair does not undertake any obligation to publicly update or revise any of this forward-looking information except as may be required by applicable securities laws.  

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

For further information, please visit www.mayfairgold.ca or direct enquiries to:

Drew Anwyll, P.Eng.
CEO, Mayfair Gold Corp.
2770 Plymouth Dr – Suite 101

Oakville, ON L6H 6Y4 Canada
+1 (855) 350-5600
info@mayfairgold.ca

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