Guanajuato Silver Files Technical Report for El Cubo Mineral Resource Estimate This news release constitutes a “designated news release” for the purposes of the Company’s prospectus
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Guanajuato Silver Files Technical Report for El Cubo Mineral Resource Estimate
This news release constitutes a “designated news release” for the purposes of the Company’s prospectus
supplement dated November 28, 2024 to its short form base shelf prospectus dated August 21, 2024
January 30, 2025 – Vancouver, British Columbia – Guanajuato Silver Company Ltd. (the “ Company” or
“GSilver”) (TSXV:GSVR)(OTCQX:GSVRF) is pleased to announce that a new National Instrument (“NI”) 43-
101 Technical Report titled “NI 43 -101 Technical Report On The El Cubo And El Pin guico Silver Gold
Complex, Guanajuato, Mexico” and dated effective August 1, 2024 (the “Report”) has been filed on Sedar
at www.sedarplus.ca. The Report presents a new mineral resource estimate (the “2024 MRE”) for GSilver’s
100% owned El Cubo mine complex (“El Cubo”) located in Guanajuato, Mexico. (See GSilver news release
dated December 19, 2024 – Guanajuato Silver Provides New El Cubo Mineral Resource Estimate).
Highlights of the Report
• Inferred mineral resources increase d 85% over previous resource estimate* to 35.6 million
silver-equivalent9 ounces (“AgEq”). See table below for assumptions regarding the calculation of
AgEq.
• Inferred mineral resource tonnes of 3,711 kt represents a 179% increase over the previous
resource estimate*.
• Indicated mineral resources of 3.9M AgEq 9; after three years of substantial mining activity at El
Cubo, the resources within the Indicated Resource category have declined by just 23% from the
previous estimate*.
• Exploration expansion potential remains high; drilling to convert inferred resources to Indicated
Resources commenced in January 2025.
The new El Cubo mineral resource estimate is part of a scheduled program to update GSilver’s NI 43-101
technical reports and resource estimates for all of its producing mines in Mexico, which includes the El
Cubo Mine complex, the Valenciana Mines Complex, and the San Ignacio mine, all located within the state
of Guanajuato, and the Topia mine located in northwestern Durango.
The 2024 MRE was prepared by APEX Geoscience Ltd. (“APEX”), with an effective date of August 1, 2024.
The 2024 MRE supersedes and updates the previous mineral resource estimate for the El Cubo mine,
disclosed previously by the Company in the technical report entitled “Technical Report – El Cubo/El
Pinguico Silver Gold Complex Project” with an eff ective date of December 31, 2023 (the “Prior Technical
Report”)*. The Report replaces the Prior Technical Report as the current NI 43-101 technical report on El
Cubo.
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2024 Mineral Resource Estimate
Mineralization at El Cubo consists of silver and gold occurring in several stratigraphic formations, with the
middle Tertiary La Bufa, Guanajuato, and Calderones formations being the most important hosts.
Mineralization at El Cubo is typical of classic high-grade silver-gold banded epithermal vein deposits, with
the most productive veins being sub-parallel to the Veta Madre system as north-northwest striking veins
and local stockwork style mineralization. Several transverse, northeast striking veins with high-grade gold
mineralization also occur. The 2024 MRE includes 44 vein domain models based on underground mapping
and sampling, drillhole geological logging, along with the silver and gold assays. The updated El Cubo
database now includes a total of 43,919 underground channel samples and 24,602 drillhole samples.
Included in these totals, GSilver has collected a total of 26,806 underground channel samples totaling
16,824 m and 4,157 drillhole sample s from 129 drillholes since they took over the Project in 2 021. As of
the Effective Date of the 2024 MRE, the Company has collected a total of 17,402 underground chip channel
samples from 4,863 channels, totalling 11,076 m of channel length, that are from the Villalpando and
Santa Cecilia areas of El Cubo and are within the mineral estimation domains. A total of 445 drillhole
samples collected by the Company are from within the mineral estimation domains.
The 2024 MRE comprises Indicated Mineral Resources of 3.9 million troy ounces (Moz) AgEq9 at 283.9 g/t
AgEq9 within 429 thousand tonnes (kt) , and Inferred Mineral Resources of 35.6 Moz AgEq9 at 298.5 g/t
AgEq9 within 3,711 kt. Table 1 presents the complete 2024 El Cubo MRE statement.
Notes:
1. Mineral Resources that are not Mineral Reserves do not have demonstrated economic viability.
2. The author is unaware of any other significant material risks to the 2024 MRE besides the risks
inherent to mineral exploration and development. Potential risk factors include changes in
metal prices, increases in operating costs, fluctuations in labour costs and availability,
availability of investment capital, infrastructure f ailures, changes in government regulations,
community engagement and socio -economic community relations, civil disobedience and
protest, permitting and legal challenges, and general environmental concerns. The mining
industry in Mexico is also prone to inc ursions by illegal miners, who gain access to mines or
exploration areas to steal mineralized material. These incursions pose a safety, security and
financial risk and can potentially compromise underground structures, equipment, and
operations.
3. The Inferred Mineral Resource in this estimate has a lower level of confidence than that applied
to an Indicated Mineral Resource and must not be converted to a Mineral Reserve. It is
reasonably expected that the majority of the Inferred Mineral Resource c ould potentially be
upgraded to an Indicated Mineral Resource with continued exploration.
4. The 2024 MRE was estimated in accordance with the Canadian Institute of Mining, Metallurgy
and Petroleum (CIM), CIM Standards on Mineral Resources and Reserves, Definitions (2014) and
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Best Practices Guidelines (2019) prepared by the CIM Standing Committee on Reserve
Definitions and adopted by the CIM Council.
5. The 2024 MRE was completed by Warren Black, M.Sc., P .Geo., Senior Consultant: Mineral
Resources with APEX Geoscience Ltd. Mr. Black is the independent Qualified Person (“QP”).
Tyler Acorn, M.Sc., Senior Geostatistician with APEX completed a peer review.
6. Historically mined areas were removed from the block-modelled Mineral Resources.
7. The 2024 MRE includes the main El Cubo resource area and the El Nayal/Cabrestantes area.
8. Specific gravity of 2.58 g/cm3 is used for the 2024 MRE.
9. Economic assumptions used include US$25/oz Ag, US$1,950 /oz Au, process recoveries of 85%
for both Ag and Au, a US$15/t processing cost, and a G&A cost of US$15/t. The resulting gold
equivalency ratio of Au:Ag ratio was 1:78 and is used for the purposes of the AgEq calculation.
10. The Underground 2024 MRE includes blocks within potential underground mining shapes. A
mining cost of US$63/t, in addition to the economic assumptions above, results in an
underground AgEq 9 lower cutoff of 135 g/t. Mining shapes are generated using stope
optimization with the objective of maximizing the total metal above the cutoff with a minimum
dimension of 1.0 m (W) by 10 m (H) by 20 m (L). All “take all” material within the mining shapes
is reported, regardless of whether the estimated grades are above the optimized cutoff grade.
Mineral Resource Estimate Methodology
APEX personnel used Ordinary Kriging with locally varying anisotropy to estimate silver and gold grades in
a 1.5 m (X) by 1.5 m (Y) by 1.5 m (Z) parent block model. This model is sub -blocked to 0.5 m by 0.5 m by
0.5 m for stope optimization and resource reporting. Kriging considers capped drillhole and underground
channel composites.
Three types of material were identified during the calculation of the MRE: 1. In Situ, 2. Remnant, and 3.
Mined Out. Blocks within, in contact with, or adjacent to underground workings were flagged as Mined
Out using a 10 m by 5 m by 1 m search ellipse, aligned along the dip direction of the domain’s trend at 0°
dip with no third-axis rotation. Blocks within 10 m of the underground workings wireframe in any direction
were classified as Remnant material, which is under evaluation but not included in the 2024 MRE. Only In
Situ material, unaffected by mining, is included in the 2024 MRE.
For Indicated resources, blocks require a minimum of three drillholes within a search ellipse measuring 30
m by 30 m by 15 m. For Inferred resources, blocks need at least one drillhole or underground channel
within a search ellipse of 60 m by 50 m by 15 m, based primarily on the second variogram structure. Only
channel composites with centroids within the workings wireframe and all core composites are considered
for Indicated classification. All channel and composites are considered for Inferred classification.
Measured resources are currently not defined. The MRE relies heavily on underground channel samples,
often in areas flagged as mined out or remnant, limiting their ability to inform domain locations for in-situ
material. Additional underground or surface drilling is needed away from the channel samples to assist in
better defining the estimation domains.
Sampling and quality assurance/quality control
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The El Cubo underground channel samples were analyzed at Corporación Química Platinum S.A de C.V.
(“QPSV”) in Silao, Guanajuato, until the establishment of the on-site El Cubo laboratory in December 2021.
Corporación Química Platinum is independent of GSilver and is accredited by Entidad Mexicana de
Acreditación, A.C. (“EMA”), which is part of the International Accreditation Forum (“IAF”). EMA also works
in conjunction with the International Organization for Standardization (“ISO”) Committee for Conformity
Assessment (“CASCO”). The El Cubo laboratory remains under GSilver management and is not
independent of the Company.
Drill core was first reviewed by a Company geologist, who identified and marked intervals for sampling.
The marked sample intervals were then cut in half with a diamond saw; half of the core was left in the
core box and the other half was removed, placed in plastic bags, sealed and labeled. Intervals and unique
sample numbers are recorded on the drill logs and the samples are sequenced with standards and blanks
inserted according to a predefined QA/QC procedure. The samples are maintained under security on site
until they are shipped to the analytical lab.
The El Cubo drill core samples were submitted to QPSV, Silao, Guanajuato, Mexico, for preparation and
analysis. To validate assay results and preparation procedures, GSilver systematically sent additional
random samples representing approximately 20% of al l analytical samples to Bureau Veritas (BV) in
Hermosillo, Sonora, Mexico, and approximately 10% of all analytical samples to SGS Mexico, S.A de C.V,
Durango, Mexico. BV and SGS are ISO/IEC geo-analytical laboratories and are independent of GSilver.
At QPSV and El Cubo laboratory, gold and silver determination was via standard atomic absorption (AA)
finish 30 -gram fire assay (FA) analysis. Overlimit results were re -run with a gravimetric finish. Multi -
element analysis of 33-elements (including silver) of select samples was via multi-acid digestion followed
by Inductively Coupled Plasma Atomic Emission Spectroscopy (ICP-AES).
At BV and SGS, gold determination was via standard AA finish 30-gram FA analysis. Silver was analyzed via
four acid digestion followed by ICP -AES or by FA with a gravimetric finish and 34 -element analysis was
performed by four acid digestion followed by ICP-AES.
GSilver’s QA-QC protocol for underground channel and drill core sampling programs at El Cubo consisted
of an insertion rate of approximately one QA-QC sample in every batch of 20 samples.
Qualified Person
The 2024 MRE was completed by Warren Black, M.Sc., P .Geo., Senior Consultant: Mineral Resources with
APEX Geoscience Ltd. Mr. Black is a Qualified Person as defined by National Instrument 43-101, Standards
of Disclosure for Mineral Projects and he is independent of the Company. Mr. Black has reviewed and
verified technical data disclosed in this news release related to the 2024 MRE.
William Gehlen, a Director of Guanajuato Silver, is a Certified Professional Geologist with the American
Institute of Professional Geologists (No. 10626), and a Qualified Person as defined by National Instrument
43-101, Standards of Disclosure for Mineral Projects.
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Mr. Gehlen has reviewed and verified technical data disclosed in this news release and detected no
significant QA/QC issues during review of the data and is not aware of any sampling, recovery or other
factors that could materially affect the accuracy or reliability of the drilling data referred to herein. Verified
data underlying the disclosed information includes reviewing compiled assay data; QA-QC performance of
blank samples, duplicates and certified reference materials; and grade calculation formulas.
About Guanajuato Silver
GSilver is a precious metals producer engaged in reactivating past producing silver and gold mines in
central Mexico. The Company produces silver and gold concentrates from the El Cubo Mine, Valenciana
Mines Complex, and the San Ignacio mine; all three mines are located within the state of Guanajuato,
which has an established 480-year mining history. Additionally, the Company produces silver, gold, lead,
and zinc concentrates from the Topia mine in northwestern Durango. With four operating mines and
three processing facilities, Guanajuato Silver is one of the fastest growing silver producers in Mexico.
ON BEHALF OF THE BOARD OF DIRECTORS
"James Anderson"
Chairman and CEO
For further information regarding Guanajuato Silver Company Ltd., please contact:
JJ Jennex, Gerente de Comunicaciones, T: 604 723 1433
GSilver.com
Guanajuato Silver Bullion Store
Please visit our Bullion Store, where Guanajuato Silver coins and bars can be purchased.
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.
Forward-Looking Statements
This news release contains certain forward -looking statements and information, which relate to future
events or future performance including, but not limited to, GSilver’s growth, the details of planned
drilling to convert Inferred resources to Indicated Resources, the interpretation of drill results, the
potential for further exploration and development of GSilver’s mineral properties, GSilver’s status as one
of the fasting growing silver mining Company in Mexico.
Such forward-looking statements and information reflect management's current beliefs and are based
on information currently available to and assumptions made by the Company; which assumptions, while
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considered reasonable by the Company, are inherently subject to significant operational, business,
economic and regulatory uncertainties and contingencies. These assumptions include: the potential
quantity, grade and metal content of the mineralized material at El Cubo and San Ignacio, the
geotechnical and metallurgical characteristics of such material conforming to sampled results and
metallurgical performance; available tonnage of mineralized material to be mined and processed;
resource grades and recoveries; assumptions and discount rates being appropriately applied to
production estimates; prices for silver, gold and other metals remaining as estimated; currency exchange
rates remaining as estimated; availability of funds for the Company's projects and to satisfy current
liabilities and obligations including debt repayments; capital, decommissioning and reclamation
estimates; prices for energy inputs, labour, materials, supplies and services (including transportation)
and inflation rates remaining as estimated; no labour-related disruptions; no unplanned delays or
interruptions in scheduled construction and production; all necessary permits, licenses and regulatory
approvals are received in a timely manner; and the ability to comply with environmental, health and
safety laws. The foregoing list of assumptions is not exhaustive.
Readers are cautioned that such forward-looking statements and information are neither promises nor
guarantees, and are subject to risks and uncertainties that may cause future results, level of activity,
production levels, performance or achievements of GSilver to differ materially from those expected
including, but not limited to, market conditions, availability of financing, currency rate fluctuations, high
inflation and interest rates, geopolitical conflicts including wars, actual results of exploration,
development and production activities, actual grades and recoveries of silver, gold and other metals from
the Company’s existing mines including El Cubo, San Ignacio, VMC and Topia, availability of third party
mineralized material for processing, unanticipated geological or structural formations and
characteristics, environmental risks, future prices of gold, silver and other metals, operating risks,
accidents, labor issues, equipment or personnel delays, delays in obtaining governmental or regulatory
approvals and permits, inadequate insurance, and other risks in the mining industry. There are no
assurances that GSilver will be able to continue to increase production, tonnage milled and recoveries
rates, improve grades and reduce costs at El Cubo, San Ignacio, VMC and/or Topia to process mineralized
materials to produce silver, gold and other concentrates in the amounts, grades, recoveries, costs and
timetable anticipated. In addition, GSilver’s decision to process mineralized material from El Cubo, San
Ignacio, VMC and Topia is not based on a feasibility study of mineral reserves demonstrating economic
and technical viability and therefore is subject to increased uncertainty and risk of failure, both
economically and technically. Mineral resources and mineralized material that are not Mineral Reserves
do not have demonstrated economic viability, are considered too speculative geologically to have the
economic considerations applied to them, and may be materially affected by environmental, permitting,
legal, title, socio-political, marketing, and other relevant issues. There are no assurances that the
Company's projected grades of gold and silver at El Cubo and San Ignacio and the anticipated level of
production therefrom will be realized. In addition, there are no assurances that the Company will meet
its production forecasts or generate the anticipated cash flows from operations to satisfy its scheduled
debt payments or other liabilities when due or meet financial covenants to which the Company is subject
or to fund its exploration programs and corporate initiatives as planned. There is also uncertainty about
impact of any resurgence of COVID-19, the ongoing war in Ukraine and conflict in Gaza, elevated inflation
and interest rates and the impact they will have on the Company's operations, supply chains, ability to
access mining projects or procure equipment, contractors and other personnel on a timely basis or at all
and economic activity in general. Accordingly, readers should not place undue reliance on forward-
looking statements or information. All forward-looking statements and information made in this news
release are qualified by these cautionary statements and those in our continuous disclosure filings
available on SEDAR+ at www.sedarplus.ca including the Company’s most recently filed annual
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information form. These forward-looking statements and information are made as of the date hereof
and the Company does not assume any obligation to update or revise them to reflect new events or
circumstances save as required by law.