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Iamgold Reports 9.0 G/T Au over 29.7 Metres from LAC Gamble Zone at the Yorbeau Rouyn Project, Quebec.

Drill Results

YORBEAU RESOURCES INC.

110 Place Crémazie, Suite 430, Montréal, QC, H2P 1B9

www.yorbeauresources.com

PRESS RELEASE

FOR IMMEDIATE RELEASE

IAMGOLD REPORTS 9.0 g/t Au OVER 29.7 METRES FROM LAC GAMBLE ZONE

AT THE YORBEAU ROUYN PROJECT, QUEBEC.

Montreal, Quebec, June 12, 2019 – Yorbeau Resources Inc. (TSX: YRB) (the “Company” or “Yorbeau”)

is pleased to report that its partner IAMGOLD Corporation (“IAMGOLD”) released today further results

from its 2019 winter diamond drilling program completed at the Company’s Rouyn project, located 4 km

south of Rouyn-Noranda, Quebec. IAMGOLD reported assay results from an additional 21 diamond drill

holes, totaling 6,181 metres. Results were previously reported for 10 diamond drill holes totaling 2,257

metres (see news release dated May 23, 2019). R esults are pending from the remaining 17 drill holes,

totaling 4,962 metres, and will be reported once they are received, validated and compiled.

The assay results reported herein are provided in Table 1 below and include the following highlights (A

longitudinal section illustrating the drilling program on the Lac Gamble zone is attached to this news

release):

Main Zone:

• Drill hole GA-19-693: 10.9 metres grading 6.6 g/t Au

includes: 4.2 metres grading 12.1 g/t Au

• Drill hole GA-19-694: 29.7 metres grading 9.0 g/t Au

includes: 11.1 metres grading 17.5 g/t Au

includes: 3.0 metre grading 53.0 g/t Au

• Drill hole GA-19-699: 12.8 metres grading 3.7 g/t Au

includes: 5.0 metres grading 7.9 g/t Au

includes: 1.6 metres grading 16.8 g/t Au

• Drill hole GA-19-715: 3.3 metres grading 9.0 g/t Au

includes: 0.8 metres grading 35.9 g/t Au

The objective of the 2019 winter diamond drilling program was to infill a portion of the Lac Gamble zone

previously drilled by Yorbeau and various joint venture partners. The program was designed to achieve an

approximate 50 x 50 metres drill hole spacing pattern to ultimately support the completion of a mineral

resource estimate. The completed drill h oles successfully intersected the targeted sheared Cadillac -Piché

corridor which hosts the mineralized zone. The zone is characterized by alteration observed to vary from

several metres to greater than ten metres in width, exhibiting variable carbonatizat ion, fuchsite,

silicification, crosscut by a network of white quartz and brown tourmaline stockwork veins and breccias.

Gold mineralization occurs as small specks of visible free gold associated with minor sulphides in quartz-

tourmaline veinlets.

YORBEAU RESOURCES INC.

110 Place Crémazie, Suite 430, Montréal, QC, H2P 1B9

www.yorbeauresources.com

Gérald Riverin, Company preside nt commented: "We are very pleased with the current series of assays

released by our partner IAMGOLD. In particular, drill hole GA-19-694 represents the best hole ever drilled

on our Rouyn project in terms of combined grade and core length, and speaks well for the strength of the

mineralizing system and the excellent potential of the Rouyn project."

In a separate press release on the current results, Craig MacDougall, Senior Vice President, Exploration for

IAMGOLD, stated: “The 2019 delineation drilling program continues to deliver positive results from the

Lac Gamble zone. As mentioned before, our involvement in the newly optioned Rouyn Gold Project was

based on the potential to rapidly delineate mineral resources along the targeted Cadillac Break, which could

be evaluated as potential satellite deposits for our Westwood operation. Once the remaining assay results

are in hand, the exploration team will work to develop a preliminary deposit model to support a future initial

resource estimate.”

About the Rouyn Gold Project

The Rouyn Gold Property is located about 4 km south of Rouyn-Noranda, Quebec. With a long history of

mining, the city of Rouyn-Noranda offers many advantages for mining and exploration, including political

and social stability, good access and infrastructure, skilled mining personnel, and one of the most mining-

friendly jurisdictions in the world.

The property covers a 12- kilometre stretch of the Cadillac -Larder Lake Break and co ntains four known

gold deposits along the 6- km Augmitto-Astoria corridor situated on the western portion of the property.

Two of the four deposits, Astoria and Augmitto, benefit from established underground infrastructure and

have been the subject of techn ical reports that include resource estimates that were previously filed in

accordance with Regulation NI 43-101.

The Lac Gamble zone is located between the Augmito and the Astoria deposits. The exploration target

potential at Lac Gamble is interpreted to be between 400,000 and 600,000 ounces of gold at a grade between

7.0 and 8.5 g/t Au. The potential quantity and grade of the exploration targets referred to are conceptual in

nature and insufficient exploration work has been completed to define a mineral r esource. The property

may require significant future exploration to advance to a resource stage and there can be no certainty that

the exploration target will result in a mineral resource being delineated. The exploration targets are

consistent with similar deposits in the area, deposit models or derived from initial drilling results.

IAMGOLD signed a definitive option agreement in December 2018, whereby IAMGOLD has the option

to acquire a 100% interest in the Project by making scheduled cash payments totaling C$4 million and

completing exploration expenditures totaling C$9 million over a four year period. Exploration programs

must include the completion of a minimum of 20,000 metres of diamond drilling within the first two-years

of the option. By the end of the expenditure period, the Company must complete a NI 43 -101 compliant

resource estimate, after which the Company, at its election, can purchase a 100% interest in the Project,

subject to a 2% net smelter return production royalty, by paying Yorbeau the lesser of C$15 per resource

ounce or C$30 million.

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.

Work at Yorbeau is carried out under the supervision of Gérald Riverin, PhD, P. Geo. He is a qualified

person (as defined by NI 43-101) and has reviewed and approved the content of this release.

YORBEAU RESOURCES INC.

110 Place Crémazie, Suite 430, Montréal, QC, H2P 1B9

www.yorbeauresources.com

The design of the drilling program and interpretation of results is under the control of IAMGOLD’s and

Yorbeau’s geological staff, including qualified persons employing strict protocols consistent with NI 43-

101 and industry best practices. The sampling of, and assay data from the drill core is monitored through

the implementation of a quality assurance - quality control (QA-QC) program. Drill core (NQ size) is logged

and samples are selected by geologists and then 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 half a metre to one

and a half metres in length depending on the geological observations.

Half-core samples are packaged and transported in sealed bags to AGAT laboratories in Val d’Or, Quebec,

and Mississauga, Ontario. Samples are coarse crushed to a - 10 mesh and then a 1,000 g ram split is

pulverized to 95% passing -150 mesh. AGAT prepare analytical pulps at their facilities located in Val-d’Or

and processed the pulps at their Mississauga laboratory which is ISO / IEC 17025:2005 certified 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 3.0 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 processed with a protocol involving fine

grinding of the entire sample, followed by metallic screen analysis of the entire pulverized material.

Insertion of duplicate, blanks and certified reference standards in the sample sequence is done in all drill

holes for quality control.

About Yorbeau Resources Inc.

The Rouyn Property, wholly-owned by the Company, contains four known gold deposits in the 6-km-long

Augmitto-Astoria corridor situated on the western portion of the property. The Company signed a definitive

agreement in December 2018, whereby IAMGOLD has the option to acquire a 100% interest in the Rouyn

property, and a major drilling program is underway. Two of the four deposits, Astoria and Augmitto, benefit

from substantial underground infrastructure and have been the subject of technical reports that include

resource estimates and that were filed in accordance with Regulation 43 -101. In 2015, the Company

expanded its exploration property portfolio by acquiring strategic base metal properties in prospective areas

of the Abitibi Belt of Quebec and Ontario that feature an infrastructure favourable for mining development.

The newly acquired base metal properties i nclude the Scott Project, which bears important mineral

resources (see the press release dated March 30, 2017) and on which a positive Preliminary Economic

Assessment was recently completed.

For additional information on the Company, consult its website at www.yorbeauresources.com.

For further information, please contact:

Gérald Riverin, PhD, P. Geo G. Bodnar Jr.

President, Yorbeau Resources Inc. Vice-President, Chief Financial Officer

Yorbeau Resources Inc. Yorbeau Resources Inc.

[email protected] [email protected]

Tel: 819-279-1336 Tel: 514-384-2202

Toll free in North America: 1-855-384-2202

Forward-looking statements: Except for statement of historical fact, all statements in this news releas e,

including without limitation, regarding the prospects of the Rouyn project, drilling results, future plans and

objectives are forward-looking statements which involve risks and uncertainties. There can be no assurance

that such statements will prove to be accurate; actual results and future events could differ materially from

YORBEAU RESOURCES INC.

110 Place Crémazie, Suite 430, Montréal, QC, H2P 1B9

www.yorbeauresources.com

those anticipated in such statements. Yorbeau disclaims any obligation to update such forward- looking

statements, other than as required by applicable securities laws.

YORBEAU RESOURCES INC.

110 Place Crémazie, Suite 430, Montréal, QC, H2P 1B9

www.yorbeauresources.com

Table 1: Rouyn Gold Project – Lac Gamble zone 2019 Winter drilling results

Notes:

1. True widths are estimated at 70 % of the core interval.

2. Drill hole intercepts are calculated with a lower cut of 1.00 g/t Au and may contain lower grade interval of

up to 3 metres in length.

3. Assays are reported uncut but high grade sub-intervals are highlighted.

4. Drill holes with the suffix W are wedge cuts from previously drilled master holes.

Hole No. AZ DIP Depth /

length Fr om To Interval True

Width (1)

Au

(2) (3) NOTE

Easting Northing Elevation (°) (°) (m) (m) (m) (m) (m) (g/t)

GA-19-687 644,478 5,339,771 3,285 185 -77 273.00 204.50 217.00 12.50 8.06 2.68 Main zone

Including (3) 209.30 212.95 3.65 2.35 5.34

221.30 235.60 14.30 9.26 2.25 Main zone

Including (3) 232.90 235.60 2.70 1.75 7.54

GA-19-693 644,843 5,339,787 3,282 187 -45 141.00 101.7 103.6 1.9 1.74 3.49 Hangingw all zone

107.90 118.80 10.90 9.96 6.63 Main zone

Including (3) 114.60 118.80 4.20 3.84 12.08

GA-19-694 644,843 5,339,787 3,282 175 -82 225.00 155.25 157.30 2.05 1.06 3.64 Hangingw all zone

172.30 202.00 29.70 15.69 8.96 Main zone

Including (3) 172.30 175.30 3.00 1.57 12.60

Including (3) 183.30 194.40 11.10 5.89 17.49

Including (3) 183.30 184.30 1.00 0.53 15.10

Including (3) 191.40 194.40 3.00 1.59 52.97

Including (3) 199.40 202.00 2.60 1.38 5.59

GA-19-695 644,843 5,339,787 3,282 152 -72 225.00 142.75 153.4 10.65 6.81 2.64 Main zone

Including (3) 142.75 146.20 3.45 2.20 5.01

211.50 214.00 2.50 1.63 1.31 Footw all zone

GA-19-696 644,798 5,339,772 3,286 188 -50 159.00 106.40 109.40 3.00 2.63 3.08 Hangingw all zone

116.00 118.00 2.00 1.75 4.55 Main zone

156.50 158.00 1.50 1.32 2.00 Footw all zone

GA-19-697 644,768 5,339,806 3,285 185 -76 267.00 217.00 222.40 5.40 3.49 1.95 Main zone

Including (3) 220.40 222.40 2.00 1.29 3.17

GA-19-698 644,851 5,339,735 3,282 149 -46 102.00 44.40 46.80 2.40 1.94 1.38 Hangingw all zone

55.55 60.20 4.65 3.76 1.16 Main zone

GA-19-699 644,768 5,339,806 3,285 175 -58 216.00 166.80 179.55 12.75 10.39 3.74 Main zone

Including (3) 174.60 179.55 4.95 4.04 7.89

Including (3) 178.00 179.55 1.55 1.26 16.82

GA-19-702 644,853 5,339,944 3,280 154 -46 330.00 262.20 269.20 7.00 6.10 1.66 Main zone

Including (3) 262.20 265.10 2.90 2.53 2.57

GA-19-703 644,830 5,339,941 3,283 174 -66 366.00

GA-19-705 644,716 5,339,912 3,285 186 -71 390.00

GA-19-706 644,772 5,339,928 3,284 185 -60 366.00 316.60 318.10 1.50 1.25 2.87 Main zone

GA-19-708 644,717 5,339,906 3,289 171 -87 462.00 409.25 411.30 2.05 1.47 1.01 Main zone

GA-19-709 644,382 5,339,936 3,281 180 -86 609.00 542.00 548.00 6.00 3.62 2.28 Hangingw all zone

Including (3) 543.00 546.00 3.00 1.81 3.36

567.00 570.00 3.00 1.83 0.85 Main zone

GA-19-710 644,382 5,339,936 3,281 175 -65 447.00 397.00 401.90 4.90 3.98 3.13 Main zone

Including (3) 397.00 399.80 2.80 2.28 4.64

GA-19-714 644,845 5,339,853 3,285 150 -60 261.00 182.00 183.75 1.75 1.34 3.48 Hangingw all zone

209.85 214.00 4.15 3.25 1.31 Main zone

GA-19-715 644,862 5,339,785 3,284 131 -45 144.00 102.90 108.20 5.30 3.79 2.73 Hangingw all zone

117.15 120.45 3.30 2.39 8.99 Main zone

Including (3) 117.15 117.90 0.75 0.54 35.90

138.3 140.10 1.80 1.31 1.21 Footw all zone

GA-19-717 644,708 5,339,775 3,283 181 -77 243.00 177.30 179.80 2.50 1.54 1.18 Hangingw all zone

198.90 207.50 8.60 5.37 1.16 Main zone

Including (3) 198.90 200.00 1.10 0.68 3.20

12-GA-592W (4) 644,475 5,339,956 3,082 173.1 -79.7 362.00 532.90 534.90 2.00 1.57 1.36 Main zone

12-GA-593W (4) 644,474 5,339,912 2,999 180.7 -72.5 247.00 495.90 497.90 2.00 1.71 3.68 Hangingw all zone

509.20 511.20 2.00 1.72 4.18 Main zone

12-GA-628W2 (4) 644,385 5,339,904 3,120 171.8 -76.9 346.00 468.00 470.00 2.00 1.54 2.59 Main zone

UTM NAD83 Zone18

No significant results

No significant results

YORBEAU RESOURCES INC.

110 Place Crémazie, Suite 430, Montréal, QC, H2P 1B9

www.yorbeauresources.com

Figure 1: Rouyn Gold – Lac Gamble zone longitudinal section and highlighted 2019 assay results.