Positive Results From 2019 Drilling Program At Monster Lake

TORONTO - IAMGOLD Corporation reported assay results from the 2019 winter drilling program completed at its Monster Lake joint venture project (IAMGOLD Corporation: 50%, TomaGold Corporation: 50%), located 50 kilometers southwest of Chibougamau, Quebec, Canada. The Company is reporting the final assay results from 16 drill holes, totaling 5,270 meters, completed as part of the 2019 exploration program.

The Monster Lake joint venture project hosts an NI 43-101 compliant resource, effective as at February 26, 2018, comprising 1,109,700 tonnes of inferred resources averaging 12.14 grams of gold per tonne for 433,300 ounces of contained gold assuming an underground mining scenario.

The objective of the 2019 drilling program was to test priority areas along the strike of the main structural corridor, hosting the 325-Megane zone, for additional zones of mineralization with potential to increase total mineral resources on the property. Three main target areas were tested along the Monster Lake Mineralized Corridor and included: the southern extensions of the 325-Megane and Lower Shear zones; the general area of the intersection of the Main Shear zone and the Big Mama Shear zone to the northeast of the 325-Megane zone; and the Annie Shear zone system also to the northeast along strike of the 325-Megane zone. All of the areas targeted in this program were best accessed during the winter when the ground is frozen.

Craig MacDougall, Senior Vice President, Exploration said, "This drilling program has yielded positive results from the Big Mama and Annie areas, which included the intersection of some local high grade intervals carrying visible gold. These positive results continue to demonstrate the potential for the discovery of additional mineralized shoots along the Monster Lake structural corridor. "

These results will be incorporated into the structural and deposit model and used to guide the next drilling programs. Ongoing field activities for the summer season includes geological, geochemical and structural studies to support exploration targeting.

The Monster Lake project is underlain by Archean volcanic rocks of the Obatogamau Formation and is traversed by an important deformation corridor and associated gold-bearing mineralized structures. Historical drilling and exploration by TomaGold Corporation ("TomaGold') have identified a four-kilometer long structural corridor, along which most of the known gold occurrences discovered to date on the property are associated, including the 325-Megane Zone.

The company’s address is 401 Bay Street, Suite 3200, Toronto ON M5H 2Y4, (416) 360-4710, www.iamgold.com.