Iamgold Files Technical Report FOR the Nelligan Project
NEWS RELEASE
TSX: IMG NYSE: IAG
IAMGOLD FILES TECHNICAL REPORT FOR THE NELLIGAN PROJECT
All monetary amounts are expressed in U.S. dollars, unless otherwise indicated.
Toronto, Ontario, February 23, 202 3 – IAMGOLD Corporation (TSX:IMG, NYSE:IAG) (“IAMGOLD” or the
“Company”) announces that the Company has filed a technical report for the Nelligan Joint Venture Project
(“Nelligan”) (IAMGOLD: 75%, Vanstar Mining Resources Inc. (“Vanstar”): 25%), titled “Independent Technical Report
for the Nelligan Gold Project, Quebec, Canada” (the 2023 Technical Report) dated February 22, 2023.
The 2023 Technical report was prepared by SRK Consulting (Canada) Inc. (“SRK”) in accordance with National
Instrument 43-101 – Standards of Disclosure for mineral Projects (“NI 43-101”), as reported in the Company’s news
release dated January 12, 2023. The 2023 Technical Report supersedes the technical report on the Nelligan project
dated December 4, 2019.
The 2023 Technical Repo rt can be found on the Company’s website at www.iamgold.com, on SEDAR at
www.sedar.com and on EDGAR at www.sec.gov/edgar.shtml.
Subsequent to a review of the pit optimization para meters used to derive a pit shell to constrain Mineral Resource
reporting and benchmarking against comparable projects , amendments were made to the mining cost applied to
waste material and to the percentage of payable metal applied relative to the M ineral Resource Estimate reported
on January 12, 2023. These parameters were reviewed by both IAMGOLD and SRK, and are considered suitable
to test the “reasonable prospects for eventual economic extraction” of the Mineral Resource model. The changes
resulted in a 21,000 ounce increase in estimated Indicated Mineral Resources and 362,000 ounce increase to
Inferred Mineral Resources.
The table below shows the resultant Mineral Resource Statement:
MINERAL RESOURCE STATEMENT – NELLIGAN PROJECT, CANADA
As at February 10th, 2023 (100% Basis)
Category Cut-off Grade
(g/t Au)
Tonnage
(Mt)
Grade
(g/t Au)
Contained Au
(koz Au)
Indicated 0.35 73.5 0.84 1 991
Inferred 0.35 129.5 0.87 3 600
Notes:
1. 2014 CIM definitions were followed for classification of Mineral Resources.
2. Mineral resources are estimated at a cut-off grade of 0.35 g/t Au.
3. Mineral Resources are reported using a gold price of US$1,500 per ounce and a US$:C$ exchange rate of 1:1.2 and gold
recoveries of 83%.
4. Mineral Resources are constrained by a Datamine Studio NPVS Scheduler optimized pit shell using a 0.35 g/t Au cut-off
grade and are considered to have reasonable prospects for eventual economic extraction.
5. High grade assay values have been capped from 7 g/t Au to 40 g/t Au in the main mineralized domains of Renard and
Footwall, respectively, and from 3 g/t Au to 12 g/t Au in the other domains. The spatial influence of high-grade samples within
Footwall, Renard and Liam domains were further controlled using high grade restriction distance parameters within the
respective search ellipsoids.
6. Bulk density values were determined by measurements on core and range from 2.70 to 2.75 g/cm 3 for the different domains
and host lithologies, to 2.00 g/cm3 for overburden.
7. Mineral Resources are not Mineral Reserves and do not have demonstrated economic viability.
8. All figures have been rounded to reflect the relative accuracy of the estimates.
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Qualified Persons, Technical Information and Quality Control Notes
The mineral resource estimate, including verification of the data disclosed, has been completed by SRK Consulting
(Canada) Inc. and has been prepared in accordance with NI 43 -101 and CIM Estimation Best Practice Guidelines.
The resource estimate was prepared by Sandeep Prakash, M. Sc., P. Geo., a Senior Consultant (Resource Geology)
with SRK, with review provided by Oy Leuangthong, Ph.D., P.Eng., Corporate Consultant, Geostatistics wit h SRK.
Mr. Prakash is an independent “qualified person”, as defined by NI 43-101 (a “QP”), and has reviewed and approved
the contents of this news release.
The QPs responsible for the supervision of the supporting drilling programs, data validation and ver ification
(including sampling, analytical and test data), deposit modelling and review of the technical information in this news
release are Maxime Douëllou, P. Geo, Consultant Geologist and Shana Dickenson, P. Geo, Senior Geologist both
attached to the IAMGOLD Val-d’Or Regional Exploration Office, Québec. Each of Mr. Douëllou and Mrs. Dickenson
is a QP for the purposes of NI 43-101 with respect to the technical information being reported on in this news release.
The technical information has been included herein with the consent and prior review of the above noted QPs.
The information in this news release was also reviewed and approved by Marie -France Bugnon, P.Geo., General
Manager Exploration for IAMGOLD, who is also a QP.
The sampling of, and assay data from, the drill core is monitored through the implementation of a quality assurance
- quality control (QA -QC) program designed to follow industry best pract ice. Drill core (NQ size) is logged and
samples are selected by the IAMGOLD geologists and sawn in half with a diamond saw at the project site. Half of
the core is retained at the site for reference purposes. Sample intervals may vary from 0.5 to 1.5 metre s in length
depending on the geological observations. Half-core samples are packaged and transported in sealed bags to ALS
Minerals Laboratory (“ALS”) located in Val -d’Or, Québec. A formal chain -of-custody procedure was adopted for
security of samples until their delivery at the laboratory. Samples are coarse crushed to a -10 mesh and then a 1,000
gram split is pulverized to 95% passing -150 mesh. ALS processes analytical pulps directly at their facilities located
in Val-d’Or which is ISO / IEC 17025 certif ied by the Standards Council of Canada. Samples are analyzed using a
standard fire assay with a 50 gram charge with an Atomic Absorption (AA) finish. For samples that return assay
values over 5.0 grams per tonne, another pulp is taken and fire assayed with a gravimetric finish. Core samples
showing visible gold or samples which have returned values greater than 10.0 grams per tonne are re -analyzed by
pulp metallic analysis. IAMGOLD inserts blanks and certified reference standards in the sample sequence for quality
control. In accordance with our QA -QC program, additional check analyses are also re -assayed at a secondary
(umpire) laboratory.
About IAMGOLD
IAMGOLD is an intermediate gold producer and developer based in Canada with operating mines in North America
and West Africa. The Company is building the large-scale, long life Côté Gold project in Canada in partnership with
Sumitomo Metals & Mining of Jap an, which is expected to commence production in early 2024. In addition, the
Company has an established portfolio of early stage and advanced exploration projects within high potential mining
districts in the Americas. IAMGOLD employs approximately 3,300 people and is committed to maintaining its culture
of accountable mining through high standards of Environmental, Social and Governance ("ESG") practices, including
its commitment to Zero Harm®, in every aspect of its business. IAMGOLD is listed on the New York Stock Exchange
(NYSE:IAG) and the Toronto Stock Exchange (TSX:IMG) and is one of the companies on the Jantzi Social Index
(“JSI”), a socially screened market capitalization -weighted consisting of companies which pass a set of broadly
based environmental, social and governance rating criteria.
IAMGOLD Contact Information
Graeme Jennings, Vice President, Investor Relations
Tel: 416 360 4743 | Mobile: 416 388 6883
Toll-free: 1 888 464 9999
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CAUTIONARY NOTE TO U.S. INVESTORS REGARDING DISCLOSURE OF MINERAL RESOURCE ESTIMATES
The mineral resource estimates contained in this news release have been prepared in accordance with NI 43 -101. These
standards are similar to those used by the United States Securities and Exchange Commission (the “SEC”) Industry Guide No. 7,
as interpreted by the SEC staff. However, the definitions in NI 43 -101 differ in certain respects from those under Industry Guide
No. 7. Accordingly, mineral resource information contained in this news release may not be comparable to similar information
disclosed by United States companies.
As a result of the adoption of amendments to the SEC’s disclosure rules (the “SEC Modernization Rules”) , which more closely
align its disclosure requirements and policies for mining properties with current industry and global regulatory practices and
standards, including NI 43 -101, and which became effective on February 25, 2019, the SEC now recognizes estimates of
"measured Mineral Resources", "Indicated Mineral Resources" and "Inferred Mineral Resources." In addition, the SEC has
amended definitions of "proven Mineral Reserves" and "probable Mineral Reserves" in its amended rules, with definitions that are
substantially similar to those used in NI 43-101. Issuers must begin to comply with these SEC Modernization Rules in their first
fiscal year beginning on or after January 1, 2021, though Canadian issuers that report in the United States using the
Multijurisdictional Disclosure System ("MJDS") may still use NI 43-101 rather than the SEC Modernization Rules when using the
SEC's MJDS registration statement and annual report forms.
United States investors are cautioned that while the SEC now recognizes "measured Mineral Resources", "Ind icated Mineral
Resources" and "Inferred Mineral Resources", investors should not assume that any part or all of the mineral deposits in thes e
categories will ever be converted into a higher category of Mineral Resources or into Mineral Reserves. These terms have a great
amount of uncertainty as to their economic and legal feasibility. Under Canadian regulations, estimates of Inferred Mineral
Resources may not form the basis of feasibility or pre-feasibility studies, except in limited circumstances. Investors are cautioned
not to assume that any "measured Mineral Resources", "Indicated Mineral Resources", or "Inferred Mineral Resources" that the
Company reports in this news release are or will be economically or legally mineable.
Further, "Inferred Mineral Resources" have a great amount of uncertainty as to their existence and as to their economic and legal
feasibility. It cannot be assumed that any part or all of an Inferred mineral resource will ever be upgraded to a higher category.
The mineral resource data set out in this news release are estimates, and no assurance can be given that the anticipated tonnages
and grades will be achieved or that the Indicated level of recovery will be realized.
CAUTIONARY STATEMENT REGARDING FORWARD-LOOKING INFORMATION
This news release contains forward-looking statements. All statements, other than of historical fact, that address activities, events
or developments that the Company believes, expects or anticipates will or may occur in the future are forward-looking statements.
Forward-looking statements are generally identifiable by, but not limited to, the use of the words “may”, “will”, “should”, “would”,
“continue”, “expect”, “expected”, “budget”, “forecast”, “anticipate”, “estimate”, “believe”, “intend”, “appear” “pl an”, “schedule”,
“guidance”, “outlook”, “potential”, “favourable”, “plans”, “targeted”, or “project” or the negative of these words or other variations
on these words or comparable terminology. Forward-looking statements are subject to a number of risks and uncertainties, many
of which are beyond the Company's ability to control or predict, that may cause the actual results to differ materially from those
discussed in the forward -looking statements. Factors that could cause actual results or events to diffe r materially from current
expectations include, among other things, without limitation, differences in the mineral content within the material identifi ed as
Mineral Resources or Mineral Reserves from that predicted, the failure to accurately estimate Miner al Resources or Mineral
Reserves, unexpected increases in capital expenditures, operating expenditures and exploration expenditures, changes in
development or mining plans due to changes in logistical, technical or other factors, the possibility that futur e exploration results
will not be consistent with the Company's expectations, changes in world gold markets and other risks disclosed in IAMGOLD's
most recent Form 40 -F/ Annual Information Form on file with the United States Securities and Exchange Commiss ion at
https://www.sec.gov/edgar.shtml and Canadian securities regulatory authorities at www.sedar.com, which are incorporated
herein. Any forward-looking statement speaks only as of the date on which it is made and, except as may be required by applicable
securities laws, the Company disclaims any intent or obligation to update any forward-looking statement. The Company disclaims
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any intention or obligation to update or revise any forward-looking statements whether as a result of new information, future events
or otherwise except as required by applicable law.
All material information on IAMGOLD can be found at www.sedar.com or at www.sec.gov.
Si vous désirez obtenir la version française de ce communiqué, veuillez consulter le www.iamgold.com/French/accueil/default.aspx.