Mayfair Gold Announces Successful Completion of Fenn-Gib Geotechnical Study
Mayfair Gold Announces Successful Completion of Fenn-Gib Geotechnical
Study
• Geotech study completed at pre-feasibility level
• Overall slope angles between 40 and 51 degrees
• Inter-ramp angles between 49 and 61 degrees
• 560-meter pit depth at 45-degree slope angle
MATHESON, Ontario, Dec. 04, 2023 -- Mayfair Gold Corp. (“Mayfair” or the “Company”) (TSX-V: MFG; OTCQB: MFGCF) is
pleased to announce the successful completion of the geotechnical and hydrogeology studies in support of pre-feasibility-level
open-pit design for the Fenn-Gib Project. Mayfair’s 100% controlled Fenn-Gib Project, located in the Timmins region of
Northeast Ontario, hosts a NI 43-101 open-pit-constrained Indicated mineral resource estimate of 3.38 million (M) ounces (oz)
gold (Au) at a grade of 0.93 grams per tonne (g/t) Au, and an Inferred mineral resource of 0.16Moz Au at 0.85 g/t Au (see the
“About Mayfair” section below). The near-surface Fenn-Gib gold mineralization is broadly disseminated striking east-west on
the Pipestone Fault over more than 1.5 kilometers (km) and is over 500 meters (m) wide at the west end.
Mayfair Gold president and CEO Patrick Evans noted: “Since acquiring Fenn-Gib three years ago, Mayfair has increased the
open-pit resource by over 70 percent, advanced drilling on the Footwall and Contact Zone discoveries, advanced baseline
environmental studies, completed pre-feasibility level metallurgical studies, and now completed pre-feasibility level
geotechnical studies. We are now preparing to commence a pre-feasibility study, which we expect to be completed by mid-
2024.”
Mayfair Gold contracted InnovExplo Inc. to manage the geotechnical and hydrogeology campaign. Field data was collected
from geomechanical drilling, televiewer, and hydrogeological analyses to support laboratory testing. Seven geomechanical
holes were drilled (3,228m) and 11 holes were surveyed using televiewer (5,306m). A total of 395 laboratory tests were
performed to characterize the rock mass, along with various point load tests and other tests.
The geological and geomechanical surveys described eight distinct geomechanical units—including the deformation zone,
mafics, and sedimentary units, which form most of the modeled pit walls. Laboratory tests (including uniaxial compressive
tests, Brazilian tests, and triaxial tests) were carried out on all geomechanical units, except for the diabase and the ultramafic
volcanic units. All geomechanical units demonstrated good rock mass quality based on the RMR 89, Q-system, and GSI
classifications, except for the diabase, which has an average Q-value of “weak.” The mafics, main zone, and sedimentary units
yielded the best properties from the laboratory tests, with uniaxial compressive strength estimated over 100 MPa. The
deformation, footwall, and pyroxenite zones showed lower property values.
Mr. Evans added: “The geotechnical study confirms the potential to extend the Fenn-Gib open-pit to below 550m. This is
attributable to highly favorable broadly disseminated nature of the Fenn-Gib gold mineralization and the competence of the
country rock. At a conservative overall pit slope of 45 degrees, the Fenn-Gib open pit could be safely developed to a depth of
560m. This would place Fenn-Gib among the deepest open pits globally.”
Table 1 below provides the modeled dimensions of the Fenn-Gib pit shell based on varying overall pit slope angles, and Table 2
lists pit slope angles of existing mines with dimensions similar to Fenn-Gib.
Table 1 – Dimensions of Fenn-Gib Pit Shell based on Overall Pit Slope Angles
OSA Depth Width Length
45° 560m 1.2 km 1.8 km
50° 580m 1.1 km 1.8 km
55° 700m 1.1 km 1.8 km
Table 2 – Open-pit Mines with Dimensions Similar to Fenn-Gib
Mine Depth IRA OSA
Canadian Malartic, Canada 360m 45° to 55° Max ≈ 55°
Côté, Canada 505m 54° to 56° 41° to 48°
Grasberg, Indonesia 550m 51° to 60° 34° to 48°
Hemlo, Canada 300m 49° to 61° N/A
Figure 1 below shows the geomechanical sectors for open-pit design recommendations, and Table 3 below details the design
recommendations.
Figure 1 - Fenn-Gib Open-pit Geomechanical Sectors for Design Recommendations
Table 3 - Fenn-Gib Open-pit Design Recommendations
Pit
Design
Sector
Geomechanical
Units
Pit
Dominant
Pit Wall
Dip
Direction
(°)
Maximum
Slope
Height
(m)
Bench
Configurations
Inter-Ramp Angle (IRA)
Configurations
Maximum
Overall
Slope
Angle
(OSA)
Bench
Face
Angle
(°)
Bench
Width
(m)
Estimated
IRA
(°)
Geotech
Berm
Width
(m)
Max
IRA
Height
(m)
From
Numerical
Modelling
(°)
A
Sedimentary
Main 0 580
80 7.5 61
25 120 47Deformation
Zone 70 54
B
Sedimentary
Main 45 580
80 8.5 59
25 120 47Deformation
Zone 70 10.0 49
C
Deformation
Zone
Main 90 560
70 10.0 49
25 120 42Footwall Zone 80 8.5 59
Mafics 80 7.5 61
Main Zone 75 9.0 54
D
Footwall Zone
Main 135 210 80 7.5 61 25 120 46Mafics
Main Zone 70 9.0 51
E
Footwall Zone
Main 225 560
70 9.0 51
25 120 51Mafics 80 8.5 59
Main Zone 75 9.0 54
Pyroxenite 70 6.5 55
F
Deformation
Zone
Main 180 580
75 10.0 52
25 120 51Mafics 80 7.5 61
Pyroxenite 70 6.5 55
G
Deformation
Zone
Main 225 340
75 10.0 52
25 120 46Diabase 75 8.5 55
Mafics 80 8.5 59
Pyroxenite 70 6.5 55
H
Deformation
Zone
Main 270 220
70 10.0 49
25 120 40Diabase 75 6.5 59
Pyroxenite 70 6.5 55
Ultramafic
Volcanic 75 10.0 52
I
Deformation
Zone
Main 315 580
70 7.5 54
25 120 49Diabase 75 6.5 59
Sedimentary 80 7.5 61
J Sedimentary West 45 146 80 8.5 59 NA 100 58
K Ultramafic
Volcanic West 90 146 70 10.0 49 NA 125 49
L
Deformation
Zone West 135-225 146
75 10.0 52
25 120 58Ultramafic
Volcanic 80 8.5 59
M Deformation
Zone West 270 146 70 10.0 49 25 120 49
N Sedimentary West 315-0 146 80 7.5 61 25 120 61
O Mafics East 90-225 80 80 7.5 61 NA NA 57Pyroxenite 70 6.5 55
P Deformation
Zone East 270-45 80 70 7.5 54 NA NA 54
Following completion of the planned pre-feasibility study, further geotechnical data will be collected to support final mine
design at feasibility level.
About Mayfair
Mayfair Gold is a Canadian mineral exploration company focused on advancing the 100% controlled Fenn-Gib gold project in
the top-tier mining region of Timmins, Northern Ontario. The Fenn-Gib gold deposit is Mayfair’s flagship asset and currently
hosts an updated NI 43-101 resource estimate with an effective date of April 6, 2023 with a total Indicated Resource of
113.69M tonnes containing 3.38M ounces at a grade of 0.93 g/t Au and an Inferred Resource of 5.72M tonnes containing
0.16M ounces at a grade of 0.85 g/t Au at a 0.40 g/t Au cut-off grade (Source: Tim Maunula, P. Geo., of T. Maunula &
Associates Consulting Inc., who is deemed a qualified person as defined by NI 43-101). The Fenn-Gib deposit has a strike
length of over 1.5km with widths ranging over 500m. The gold mineralized zones remain open at depth and along strike to the
east and west. Recently completed metallurgical tests confirm that the Fenn-Gib deposit can deliver robust gold recoveries of
up to 94%.
For further information contact:
Patrick Evans, President and CEO
Phone: (480) 747-3032
Email: [email protected]
Web: www.mayfairgold.ca
Qualified Person Statement
Mayfair Gold’s disclosure of technical and scientific information in this news release has been reviewed and approved by
Howard Bird, P Geo., Vice President Exploration for the Company, who serves as a Qualified Person under the definition of
National Instrument 43-101.
Forward Looking Statements
This news release contains forward-looking statements and forward-looking information within the meaning of Canadian
securities legislation (collectively, " forward-looking statements ") that relate to Mayfair’s current expectations and views of
future events. Any statements that express, or involve discussions as to, expectations, beliefs, plans, objectives, assumptions
or future events or performance (often, but not always, through the use of words or phrases such as "will likely result", "are
expected to", "expects", "will continue", "is anticipated", "anticipates", "believes", "estimated", "intends", "plans", "forecast",
"projection", "strategy", "objective" and "outlook") are not historical facts and may be forward-looking statements and may
involve estimates, assumptions and uncertainties which could cause actual results or outcomes to differ materially from those
expressed in such forward-looking statements. No assurance can be given that these expectations will prove to be correct and
such forward-looking statements included in this news release should not be unduly relied upon. These statements speak only
as of the date of this news release.
Forward-looking statements are based on a number of assumptions and are subject to a number of risks and uncertainties,
many of which are beyond Mayfair’s control, which could cause actual results and events to differ materially from those that
are disclosed in or implied by such forward- looking statements. Such risks and uncertainties include, but are not limited to,
the impact and progression of the COVID-19 pandemic and other factors. Mayfair undertakes no obligation to update or revise
any forward-looking statements, whether as a result of new information, future events or otherwise, except as may be required
by law. New factors emerge from time to time, and it is not possible for Mayfair to predict all of them, or assess the impact of
each such factor or the extent to which any factor, or combination of factors, may cause results to differ materially from those
contained in any forward-looking statement. Any forward-looking statements contained in this news release are expressly
qualified in their entirety by this cautionary statement.
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 news release.
A photo accompanying this announcement is available at
https://www.globenewswire.com/NewsRoom/AttachmentNg/c4a36105-c568-4b03-bbd9-fb8cf44a44da