Iamgold Updates Diamond Drilling Results ON Its Advanced Boto Exploration Project, Senegal
NEWS RELEASE
TSX: IMG NYSE: IAG
IAMGOLD UPDATES DIAMOND DRILLING RESULTS ON ITS ADVANCED BOTO
EXPLORATION PROJECT, SENEGAL
Toronto, Ontario, May 31, 2017 – IAMGOLD Corporation (“IAMGOLD” or the “Company”) today announced
additional drilling results from its 100% owned Boto Gold Project in eastern Senegal, West Africa. The
reported assay results are from the remaining twenty -two diamond drill holes, totaling 2,842 metres,
completed at the Malikoundi deposit and Malikoundi North extension. The Company’s ongoing drilling
program had resumed in the fourth quarter of 2016 after seasonal rains, and continued into the first quarter of
2017.
The assay results are provided in Tables 1 and 2 and include the following highlights:
Malikoundi Deposit (Deepened Holes):
Drill Hole DBDD-2201: 37 metres grading 1.83 g/t gold
and 19 metres grading 3.28 g/t gold
Drill Hole DBDD-2261: 42 metres grading 1.26 g/t gold
Drill Hole DBDD-2266: 77 metres grading 4.35 g/t gold
Includes: 9 metres grading 11.76 g/t gold
Malikoundi North Extension:
Drill Hole DBDD-2321: 14 metres grading 1.64 g/t gold
Drill Hole DBDD-2322: 22 metres grading 1.79 g/t gold
Craig MacDougall, Senior Vice President, Exploration for IAMGOLD , stated, "With the last round of drilling
results now in hand from our drilling program at the Malikoundi deposit, we are working to update the resource
model for use in our ongoing technical evaluation of the project. Our drilling activities are now focused on
targeting possible resource expansions at the Boto 5 and Boto 6 deposits.”
BOTO PROJECT, SENEGAL
The Boto project comprises 236 square kilometres of exploration licenses located in eastern Senegal along
the Senegal-Mali border. The geological setting of the project area is similar to the prolific Sadiola and Loulo
gold districts in adjacent Mali, being underlain by h ighly prospective, Birimian-aged metasedimentary, volcanic
and intrusive rocks along a seven-kilometre strike length of the Senegal-Mali Shear Zone.
As of December 31, 2016, the project hosts an indicated resource of 27.7 million tonnes averaging 1.8 gram s
of gold per tonne for 1.56 million ounces and an inferred resource of 2.9 million tonnes averaging 1.3 grams of
gold per tonne for 125,000 ounces (see news release regarding reserves and resources dated February 22,
2017).
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Next Steps
The drilling results from Malikoundi will be incorporated into an updated resource model for the Boto project.
Diamond drilling activities continue on the property t argeting additional mineral resources along known
mineralized trends associated with the Boto 5 and Boto 4-6 deposits.
Technical Information and Quality Control Notes
Boto Project, Senegal:
The Boto drilling results contained in this news release have been prepared in accordance with National
Instrument 43-101 Standards of Disclosure for Mineral Projects. The sampling of, and assay data from, drill
core is monitored through the implementation of a qua lity assurance - quality control (QA -QC) program
designed to follow industry best practice. Drill core (HQ and NQ size) 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 are generally 1 metre in length. Samples are prepared at the Veritas
Preparation Laboratory in Bamako, Mali and analyzed using a standard fire assay with a 50 gram charge with
an Atomic Absorption (AA) finish at the Veritas Analytical Laboratory in Abidjan, Ivory Coast.
Qualified Persons
The information in this news release was prepared under the supervision of, and reviewed and verified by,
Craig MacDougall, P.Geo., Senior Vice President, Exploration for IAMGOLD. Mr. MacDougall is a Qualified
Person as defined by National Instrument 43-101.
Forward Looking Statement
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 (including, without limitation, statements regarding expected, estimated or planned gold
production, cash costs, margin expansion, capital expenditures and exploration expenditures and statements
regarding the estimation of mineral resources, exploration results, potential mineralization, potential mineral
resources and mineral reserves) are forward-looking statements. Forward-looking statements are generally
identifiable by use of the words “will”, “continue”, “expect”, “estimate”, “intend”, “to have’, “plan” 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 of the Company 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, failure to meet expected,
estimated or planned gold production, cash costs, margin expansion, capital expenditures and exploration
expenditures and failure to establish estimated mineral resources, the possibility that future exploration results
will not be consistent with the Company's expectations, changes in world gold marke ts 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 and Canadian provincial securities regulatory authorities. 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.
About IAMGOLD
IAMGOLD ( www.iamgold.com) is a mid -tier mining company with four operating gold mines on three
continents. A solid base of strategic assets in North and South America an d West Africa is complemented by
development and exploration projects and continued assessment of accretive acquisition opportunities.
IAMGOLD is in a strong financial position with extensive management and operational expertise.
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For further information please contact:
Ken Chernin, VP Investor Relations, IAMGOLD Corporation
Tel: (416) 360-4743 Mobile: (416) 388-6883
Laura Young, Director, Investor Relations, IAMGOLD Corporation
Tel: (416) 933-4952 Mobile: (416) 670-3815
Shae Frosst, Investor Relations Associate, IAMGOLD Corporation
Tel: (416) 933-4738 Mobile: (647) 967-9942
Toll-free: 1-888-464-9999 [email protected]
Please note:
This entire news release may be accessed via fax, e -mail, IAMGOLD's website at www.iamgold.com and through CNW Group’s website
at www.newswire.ca. 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 http://www.iamgold.com/French/accueil/default.aspx.
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Notes:
1. Drill hole intercepts are calculated using a minimum down-hole length of 2 meters, a cut-off grade of 0.5 g/t gold, a global assay cap of
25 g/t gold and may include up to 5 metres of internal dilution.
2. The true widths of intersections are interpreted to approximate the reported downhole lengths.
Notes:
1. Drill hole intercepts are calculated using a minimum down-hole length of 2 meters, a cut-off grade of 0.5 g/t gold, a global assay cap of
25 g/t gold and may include up to 5 metres of internal dilution.
2. The true widths of intersections are interpreted to approximate the reported downhole lengths.
3. *- previously reported footwall intercept (see new releases dated October 20, 2014;February 3, 2015, April 23, 2015 and July 20, 2015)
Hole# AZ DIP EOH From To Length Grade
Easting Northing Elevation (degrees) (degrees) (m) (m) (m) (m) (g/t Au)
2313 241964 1379263 165 90 -60 225 81 85 4 1,12
116 118 2 0,73
2314 242030 1379121 165 90 -60 215 63 65 2 0,65
2315 242128 1379248 164 90 -60 125 No significant intersection
2316 242159 1378899 162 115 -60 60 No significant intersection
2321 241943 1380065 163 115 -60 99 71 85 14 1,64
2322 241986 1380047 163 115 -60 45 13 35 22 1,79
2323 241903 1380302 162 115 -60 150 69 72 3 0,79
122 133 11 1,10
2324 241905 1380410 160 115 -60 150 127 131 4 1,48
2325 241946 1380501 159 115 -60 102 44 46 2 0,74
83 85 2 3,38
2326 242001 1380532 158 115 -60 42 14 16 2 0,84
2327 241957 1380674 131 122 -60 99 No significant intersection
2328 242004 1380652 133 115 -60 45 No significant intersection
2329 241894 1380251 162 115 -60 170 No significant intersection
2330 241912 1380464 159 115 -60 160 117 129 12 1,47
2331 241896 1380195 162 115 -60 170 126 140 14 0,80
2332 242000 1379683 165 115 -60 60 44 48 4 0,52
2333 241986 1379822 164 115 -60 60 44 49 5 0,59
2334 241955 1379704 165 115 -60 108 93 95 2 1,99
2335 241941 1379842 164 115 -60 108 86 90 4 3,29
2336 241983 1379942 164 115 -60 61 26 40 14 0,99
2338 241938 1379963 164 115 -60 108 71 84 13 0,84
Total 2362
Table 1: Boto Project Drilling Results – Malikoundi and Malikoundi North Deposit
UTM (WGS84Zone29N)
Hole# AZ DIP EOH From To Length Grade
Easting Northing Elevation (degrees) (degrees) (m) (m) (m) (m) (g/t Au)
2201 Ext 241728 1379267 166 116 -60 470 375 412 37 1,83
including 405 407 2 15,37
420 439 19 3,28
2204* 241770 1379357 166 116 -60 350 318 350 32 1,67
2204 Ext 241770 1379357 166 116 -60 410 318 354 36 1,58
2217 Ext 241726 1379204 166 115 -60 500 407 411 4 2,95
428 433 5 0,80
478 481 3 1,26
2225 Ext 241776 1379295 166 116 -60 420 398 411 13 2,01
2259* 241633 1379366 166 115 -60 481 415 480 65 1,57
2259 Ext 241633 1379366 166 115 -60 570 415 492 77 1,48
503 510 7 1,74
522 527 5 5,54
533 567 34 1,34
2261* 241727 1379323 166 115 -60 417 403 415 12 2,07
2261 Ext 241727 1379323 166 115 -60 465 403 445 42 1,26
2266* 241639 1379254 166 115 -60 465 432 465 33 4,28
2266 Ext 241639 1379254 166 115 -60 525 432 509 77 4,35
including 469 478 9 11,76
including 483 485 2 9,77
523 525 2 4,49
Total 480
Table 2: Boto Project Drilling Results – Deepened Drill Holes (Ext), Malikoundi Deposit
UTM (WGS84Zone29N)
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