Lamgold Assay Results Extend Gosselin Zone at Côté GOLD Project
NEWS RELEASE TSX: IMG NYSE: IAG
lAMGOLD ASSAY RESULTS EXTEND GOSSELIN ZONE AT CÔTÉ GOLD PROJECT
Toronto, Ontario, January 27, 2022 – IAMGOLD Corporation (NYSE:IAG) (TSX:IMG) (“IAMGOLD” or the
“Company”) is pleased to announce additional assay results from its delineation diamond drilling program at the
Gosselin zone discovery, centered approximately 1.5 kilometres northeast of the Côté Gold construction project
(“Côté Gold”) in Ontario, Canada . The Gosselin delineatio n drilling program is being undertaken as part of the
Côté Gold 70:30 joint venture between IAMGOLD, as the operator, and Sumitomo Metal Mining Co., Ltd. (“SMM”).
Côté Gold is currently under construction with commercial production anticipated in the second half of 2023 (refer
to Company news releases dated October 18, 2021 and January 12, 2022).
Highlights include:
355.5 meters (“m”) at 0.78 grams per tonne gold (“g/t Au”) in drill hole GOS21 -94 from 128.5 m
including
o 96.6 m at 1.50 g/t Au from 383.4 m;
256.0 m at 2.05 g/t Au in drill hole GOS21-98 from 156.0 m including
o 1.0 m at 101.0 g/t Au from 284.0 m; and
o 1.0 m at 197.0 g/t Au from 321.0 m;
357.5 m at 0.55 g/t Au in drill hole GOS21-101 from 65.5 m including
o 48.5 m at 1.03 g/t Au from 65.5 m, and
o 111.0 m at 0.86 g/t Au from 312.0 m;
173.0 m at 0.70 g/t Au in drill hole GOS21-95 from 228.0 m including
o 102.0 m at 0.95 g/t Au from 273.0 m;
87.9 m at 1.30 g/t Au in drill hole GOS21-102 from 335.1 m, including
o 1.0 m at 60.20 g/t from 383.5 m.
Craig MacDougall, Executive Vice President, Growth for IAMGOLD, stated: “Our confidence in the Gosselin
resource continues to build and these latest results compar e well with predicted grades from the resource block
model and in some cases have extended th e mineralization outside of the resource boundaries of the
mineralization model. Our planned drilling program in 2022 will target areas with potential for resource expansion.”
IAMGOLD is reporting assay results from an additional ten (10) diamond drill holes totaling 4,149 metres
completed between July and October, 2021, for which results were received after the closure of the database
used to support the Gosselin deposit mineral resources estimate disclosed on October 18, 2021. The assay results
reported are provided in Table 1 below (refer to plan map for drill hole locations outlined in Figure 1).
On September 21, 2021, IAMGOLD reported assay results for thirty one (31) diamond drill holes totaling 11,735
metres completed in 2021. These results of the in-fill drilling program were incorporated into the initial mineral
resource estimate for the Gosselin deposit announced on October 18, 2021 (refer to Company news release dated
October 18, 2021) which estimated 3.35 million ounces in indicated resources and a further 1.71 million ounces
in inferred resources (on a 100% basis using a US$1,500 per ounce gold price).
Next Steps
The resource estimation process has identified a number of areas with potential for resource expansion at depth,
along strike and in areas where drill hole spacing remains too wide to classify mineral resources at this time. The
Gosselin deposit has only been drilled to about half the depth of the Côté Gold deposit and remains open at depth
Page | 2 of 5
where a number of drill holes ended in mineralization. In addition, an overlap area between the Gosselin deposit
and the adjacent Côté Gold resource pit shell s could potentially provide an opportunity for optimization of a
combined pit shell selection, which may unlock mineral resources in the overlap area. A winter diamond drilling
program is planned to begin testing these expansion target areas and preparation of land and lake -ice based
platforms are presently in progress.
Additional technical studies are planned which will include: a sampling program to advance future metallurgical
test work to evaluate comminution characteristics and gold recoveries over a range of ore types and grades;
mining and infrastructure studies to review alternatives to optimize the inclusion of the Gosselin deposit resources
into future Côté Gold life-of-mine plans; and commencing the collection of additional baseline data to support
future permitting requirements.
Figure 1 – Gosselin drill hole surface plan and 2021 assay highlights
About the Gosselin Deposit
The Gosselin zone discovery is located immediately adjacent to the northeast of the Côté Gold deposit and is
accessible by construction roads on the developing mine property. Diamond drilling to date has delineated wide
intervals of low -grade gold mineralization hosted in altered and brecciated intrusive lithologies simil ar to that
observed at the adjacent Côté Gold deposit, extending from the Young-Shannon historical shaft in the west to the
Gosselin zone in the east. Drilling to date has outlined mineralization over a strike length of 1,400 metres, width
of 400 metres and a depth extent of 425 metres. The deposit outcrops below the shallow Three Ducks Lake, and
remains open at depth, to the northwest, and along strike to the northeast and southwest.
GOS18-09
GOS18-10
GOS18-11
GOS18-13
GOS18-12
GOS18-06
GOS18-07
GOS18-15A
YS87-8
YS88-47c
YS89-89
YS89-163
NV-02-03
YS90-182B
YS90-180
YS90-179
YS90-181
YS90-172B
YS89-82B
YS89-116
Young-Shannon
Shaft
GOS19-16A
GOS19-20
GOS19-21
GOS19-22
GOS19-18
GOS19-25
GOS19-17
GOS19-23
GOS19-19GOS19-27
GOS19-24
GOS19-26
GOS19-28
YS90-183
?
?
?
GOS20-50
GOS20-47
GOS20-49
GOS20-45
GOS20-52GOS20-53
GOS19-30
GOS19-31
GOS19-32
GOS20-43
GOS20-46
GOS20-38
GOS20-40
GOS20-42
GOS20-39
GOS20-41
GOS20-36
GOS20-34
GOS20-35
GOS20-51
GOS20-60
GOS20-58
GOS20-61
GOS20-59
GOS20-54
GOS19-33
GOS20-56
GOS20-44
GOS20-48
GOS18-14
GOS19-29
GOS20-37
YS89-108B
YS89-110
GOS20-62
LEGEND
2021 IAMGOLD drill holes
Previously reported drill holes
Historical drill holes
Lake
Estimated 0.5 g/t Au grade model
GOS20-55
GOS20-57
GOS21-87
GOS21-74
GOS21-71
GOS21-82
GOS21-76
GOS21-70
GOS21-68
GOS21-91GOS21-93
GOS21-65
GOS21-63
GOS21-85
GOS21-64
GOS21-73
GOS21-72
GOS21-75
GOS21-77
GOS21-78
GOS21-80
GOS21-84
GOS21-66
GOS21-83GOS21-67
GOS21-81
GOS21-69
GOS21-86 GOS21-89GOS21-90
GOS21-88
GOS21-92
GOS21-95
173.0 m grading 0.70 g/t Au
Incl. 102.0 m grading 0.95 g/t Au
GOS21-96
212.0 m grading 0.60 g/t Au
Incl. 139.0 m grading 0.77 g/t Au
GOS21-94
355.5 m grading 0.78 g/t Au
Incl. 96.6 m grading 1.50 g/t Au
GOS21-102
87.9 m grading 1.30 g/t Au
GOS21-79
Côté LOM Pit
GOSSELIN PROJECT
2021 Drilling Program
GOS21-98
256.0m grading 2.05 g/t Au
GOS21-99
81.0 m grading 0.66 g/t Au
GOS21-103
72.0 m grading 0.91 g/t Au
203.0 m grading 0.55 g/t Au
GOS21-101
357.5 m grading 0.55 g/t Au
Incl. 48.5 m grading 1.03 g/t Au
Incl. 111.0 m grading 0.86 g/t Au
GOS21-95
GOS21-100 GOS21-101
GOS21-103
GOS21-94
GOS21-98
GOS21-96
GOS21-97
GOS21-99
GOS21-102
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A significant milestone was reached on October 18 , 2021 with the announcement of an initial mineral resource s
estimation of the Gosselin deposit, comprising 3.35 million ounces in an indicated category and a further 1.71
million ounces in an inferred category at overall grade similar to the Côté Gold deposit (refer to Company news
release dated October 18, 2021). The mineral resources estimate for the Gosselin zone incorporates assay results
from 163 diamond drill holes totaling 54,775 metres, including 95 drill holes holes totaling 38,398 metres
completed by IAMGOLD as part of its delineation drilling program. The addition of the Gosselin deposit to the total
mineral resources inventory in the Côté District represents a 33% increase in ounces in the measured and
indicated resources categories and a 45% increase in ounces in the inferred resources category.
Table 1 Gosselin Project Drilling Results - 2021 Drilling program
Hole No. UTM NAD83 Zone17 AZ DIP EOH From To
Core
Interval
(1)
Au (2) (3)
Easting Northing Elevation (°) (°) (m) (m) (m) (m) (g/t)
GOS21-94 430949 5267907 383 125 -63 487.00 128.50 484.00 355.50 0.78
Including (3) 383.40 480.00 96.60 1.50
Including (3) 396.00 397.30 1.30 10.40
GOS21-95 431082 5268007 385 148 -50 424.61 228.00 401.00 173.00 0.70
Including (3) 273.00 375.00 102.00 0.95
GOS21-96* 431027 5267713 381 325 -65 435.00 195.00 407.00 212.00 0.60
Including (3) 215.00 354.00 139.00 0.77
GOS21-97* 431013 5267766 381 333 -65 121.50 59.50 90.50 31.00 0.48
GOS21-98* 431032 5267812 381 330 -65 417.00 156.00 412.00 256.00 2.05
Including (3) 196.00 197.00 1.00 11.10
Including (3) 222.00 223.00 1.00 17.20
Including (3) 284.00 285.00 1.00 101.00
Including (3) 321.00 322.00 1.00 197.00
GOS21-99 430888 5267553 382 333 -50 438.00 356.00 437.00 81.00 0.66
Including (3) 418.10 419.00 0.90 14.90
GOS21-100* 431270 5267877 382 330 -63 421.50 No significant values
GOS21-101* 431320 5267857 381 195 -60 423.00 65.50 423.00 357.50 0.55
Including (3) 65.50 114.00 48.50 1.03
Including (3) 312.00 423.00 111.00 0.86
GOS21-102 430784 5267356 395 330 -60 426.00 335.05 422.90 87.90 1.30
Including (3) 383.50 384.50 1.00 60.20
GOS21-103* 431495 5267766 381 330 -65 555.00 156.00 228.00 72.00 0.91
Including (3) 186.00 187.00 1.00 10.50
352.00 555.00 203.00 0.55
Including (3) 467.00 496.00 29.00 1.43
Notes:
1. Actual core widths are estimated to be approximately 60 to 95% of the core interval.
2. Drill hole intercepts are calculated with a lower cut of 0.30 g/t Au.
3. Assays are reported uncut but high grade sub-intervals are highlighted.
* BTW drill core. Core diameter is 42.0 mm
Page | 4 of 5
Technical Information and Quality Control Notes
The drilling results contained in this news release have been prepared in accordance with National Instrument 43-
101 Standards of Disclosure for Mineral Projects (“NI 43-101”).
Al Smith, P. Geo, District Manager – Exploration for IAMGOLD in the Ontario Côte Gold District is the Qualified
Person (“QP”) for the purposes of NI 43-101 and is responsible for the supervision of the preparation, verification
and review of the technical information in this news release.
The QP responsible for the planning, supervision and execution of the diamond drilling program is Brad McKinley,
P. Geo, Senior Geologist for IAMGOLD in the Ontario Côte Gold District. 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 reviewed and approved by Craig MacDougall, P.Geo., Executive Vice
President, Growth for IAMGOLD. Mr. MacDougall is a QP as defined by NI 43-101.
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 practice. Drill core (NQ size) samples are
selected by the IAMGOLD geologists and sawn in half with a diamond saw at the pro ject site. Half of the core is
retained at the site for reference purposes. Sample intervals may vary from 0.5 to 1.5 metres in length depending
on the geological observations. Samples were stored in sealed plastic bags and packed into fiber backs onto a
pallet where they were shrink wrapped for transport. A formal chain-of-custody procedure was adopted for security
of samples until their delivery at the laboratory.
Activation Laboratories Limited (ACTLABS - located in Timmins, Ontario) was utilized for ass ay analyses,
performing crushing, pulverizing, and fire assay in Timmins, Ontario. Activation Laboratories completed the
following laboratory procedure: samples are coarse crushed to 90% passing 2.0 mm screen (10 mesh screen),
riffle split (250 gram) and (mild steel) to 95% passing 105µm. Cleaner sand is included. Samples were analyzed
using a standard 30 gram fire assay (30 g aliquot) with an Atomic Absorption (AA) finish.
For samples that returned assay values over 3.0 grams per tonne (g/t), another cut is taken from the original pulp
and fire assayed with a gravimetric finish. For samples showing visible gold (VG) or samples which have returned
values greater than 5.0 g/t, these were re-analyzed by pulp metallic analysis.
IAMGOLD inserts blanks and certified reference standards in the sample sequence for quality control.
In accordance with recommendations from our on-going QA-QC program, additional check analyses are underway
at ACTLABS.
About IAMGOLD
IAMGOLD is a mid-tier gold mining company operating in three regions globally: North America, South America
and West Africa. Within these regions the Company is developing high potential mining districts that encompass
operating mines and construction, development and exploration projects. The Company’s operating mines include
Essakane in Burkina Faso, Rosebel (including Saramacca) in Suriname and Westwood in Canada. A solid base
of strategic assets is complemented by the Côté Gold construction project in Canada, the Boto Gold development
project in Senegal, as well as greenfield and brownfield exploration projects in various countries located in the
Americas and West Africa.
IAMGOLD employs approximately 5,000 people. IAMGOLD is committed to maintaining its culture of accountable
mining through high standards of Environmental, Social and Governance practices, including its commitment to
Zero Harm®, in every aspect of its business. IAMGOLD (www.iamgold.com) 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 JSI
index1.
1 Jantzi Social Index (“JSI”). The JSI is a socially screened market capitalization-weighted common stock index modeled on the S&P/TSX 60. It consists
of companies which pass a set of broadly based environmental, social and governance rating criteria.
Page | 5 of 5
IAMGOLD Contact Information
Graeme Jennings, Vice President, Investor Relations
Tel: 416 360 4743 | Mobile: 416 388 6883
Philip Rabenok, Manager, Investor Relations
Tel: 416 933 5783 | Mobile: 647 967 9942
Toll-free: 1 888 464 9999
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 sta tements 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” “plan”, “schedule”, “guidance”,
“outlook”, “potential”, “plans”, “targeted”, “focused”, or “project” or the negative of these words or other variations on th ese 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 differ materially from current expectations include, among other things,
without limitation, differences in the mineral content within the material identified as mineral resources or mineral reserve s from that
predicted, the failure to accurately estimate mineral resources or mineral reserv es, unexpected increases in capital expenditures,
operating expenditures and exploration expenditures, changes in development or mining plans due to changes in logistical, tec hnical
or other factors, the possibility that future 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 Commission at https://www.sec.gov/edg ar.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 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.
CAUTIONARY NOTE TO U.S. INVESTORS REGARDING DISCLOSURE OF MINERAL RESERVE AND
MINERAL RESOURCE ESTIMATES
The mineral resource and reserve 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 Gu ide 7.
Accordingly, mineral resource and reserve information contained in this news release may not be comparable to similar informa tion
disclosed by United States companies. Under the SEC's Industry Guide 7, mineralization may not be classified as a "rese rve" unless
the determination has been made that the mineralization could be economically and legally produced or extracted at the time t he
reserve determination is made.
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 miner al
reserves" and "probable mineral reserves" in its amended rules, with d efinitions that are substantially similar to those used in NI 43 -
101. Issuers must begin to comply with the 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", "indicated mineral resources"
and "inferred mineral resources" under the SEC Modernization Rules, investors should not assume that any part or all of the m ineral
deposits in these categories will ever be converted in to 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 mine ral
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 reserve and 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.
This entire news release may be accessed via fax, e-mail, IAMGOLD's website at www.iamgold.com and through Newsfile’s website
at www.newsfilecorp.com. 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.