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Altan Tsagaan Ovoo
(ATO) Gold Mine

The ATO Gold Mine is a multi-phase precious metals project 100% owned by Steppe Gold, covering

hectares in Dornod, Mongolia.

After the successful start of Phase 1 Oxide Project in 2020, Steppe Gold produced a total of 110 Koz Au and 200 Koz Ag by 2024 Q1.

Secured full financing of US$150 million, ATO Phase 2 Expansion development is underway, scheduled to begin commissioning in H1 2026 with an average annual production of over 90 Koz AuEq over 12 years at an all-in-sustaining cost (AISC) of approximately US$1,000/oz.

ATO deposit contains mineral reserves of 29.1Mt at 1.13 g/t gold and 12.42 g/t silver, providing 12+ years mine life of fresh rock zone with 1.7 Moz AuEq high-margin recoverable reserve until 2036.



Source: DRA 2021

Image of Existing ATO Project Site as of May 2023