Yorbeau Resources Inc. reported that its partner IAMGOLD Corporation (‘'IAMGOLD'') has received all the assay results from its 2021 exploration diamond drilling program completed on the Cinderella and Augmitto areas at the Rouyn Project. IAMGOLD holds a purchase option with Yorbeau for the Rouyn Project which is located 4 km south of Rouyn-Noranda, Québec, and approximately 45 kilometers southwest of IAMGOLD's Westwood operation. The Company is reporting assay results from twenty-eight (28) diamond drill holes from which three (3) were abandoned due to excessive deviation.

This part of the 2021 drilling program has totaled 10,418 metres. This program tested a segment of the Cadillac Fault located approximately 1 to 3 kilometres west of the Lac Gamble zone. The diamond drilling program had for main objective to test further areas where previous drilling identified zones of mineralization and to evaluate its continuity with potential to outline a resource.

All drill holes successfully intersected the targeted sheared Cadillac-Piché corridor, which hosts several mineralized structures emplaced at different levels in the stratigraphy. The Upper and Main zones are associated with alteration varying from several metres to greater than ten metre in width, hosted in the ultramafic rocks of the Piché Group, exhibiting variable carbonatization, fuchsite, silicification, and 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.

At the south contact of the Piché Group with the sedimentary sequence, another mineralization style (the Footwall contact zone) is frequently intersected and is characterized by grey quartz veinlets containing rare visible gold and up to 10% disseminated to narrow massive bands of Arsenopyrite adjacent to the veins. Occasionally similar mineralization is also observed further away from the contact and exclusively hosted in the sediments. This zone is referred to as the Footwall zone.

Results in the Cinderella Central sector seems to demonstrate a certain continuity of the High-Grade mineralization. This drilling program has been conducted in the second half of 2021 and long delays to receive the assay results were experienced. These results are now integrated with the existing geological, geochemical and structural information to support the development and refinement of preliminary deposit models to support a future potential maiden resource estimate targeted for the end of 2022.

An additional exploration drilling phase was also recently completed and tested the extensions to the east and to the west of the Lac Gamble zone. A total of 6,456 metres were drilled in eleven (11) holes including two (2) holes abandoned for technical problems. These assay results will be reported and integrated to the current database when received, validated and compiled. 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”).

Mr. Laurent Hallé, P.Geo, Consulting geologist and qualified person for the purposes of NI 43-101 with respect to the technical information being reported on has read and approved this press release. The design of the drilling program and interpretation of results is under the control of IAMGOLD's and Yorbeau's geological staff, including QPs 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 0.5 to 1.5 metres in length depending on the geological observations.

Half-core samples are packaged and transported in sealed bags to either AGAT laboratories (“AGAT”) in Val d'Or, Québec, and Mississauga, Ontario, or 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 grams 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. ALS processes analytical pulps directly at their facilities located in Val-d'Or which is ISO /IEC 17025 certified by the Standards Council of Canada. Samples are analyzed using a standard fire assay with a 50 grams charge with an Atomic Absorption (AA) finish.

For samples that return assay values over 3.0 grams (for AGAT) or 5.0 grams per tonne (for ALS), 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.