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GOLDPRODUCTION UPDATEPROJECT ECONOMICS

San Agustin Mine Production Update: $35M NPV, 548% IRR

ByMining Stocks Research
Jun 14, 2026
Source:Heliostar Metals Ltd.
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Heliostar Metals Ltd.'s San Agustin Mine in Durango, Mexico has a production guidance outlining an after-tax NPV of $35M, an after-tax IRR of 548%, and initial capital of $40M. The mine plan runs 1.2 years at about 30 koz Au per year.

Heliostar Metals Ltd.'s San Agustin Mine has reported production guidance results for the gold project in Durango, Mexico. The study headlines an after-tax net present value of $35M at a 5% discount rate. It reflects Heliostar Metals Ltd.'s (HSTR.V) latest disclosed economics for the asset.

Economics. The after-tax NPV is $35M using a 5% discount rate. After-tax IRR is 548%. Initial capital expenditure is estimated at $40M. All-in sustaining costs are pegged at 2150 USD/oz Au.

Production and mine plan. The project envisions an open pit operation. Life of mine is 1.2 years. Average annual production is approximately 30 koz Au. Average head grade is 0.29 g/t gold.

Resources and ownership. Mineral reserves: 68 koz gold (Probable: 7,358 kt @ 0.29 g/t Au, 16.4 g/t Ag). Mineral resources: M&I: 325 koz Au (23,629 kt @ 0.43 g/t Au, 12.2 g/t Ag); Inferred: 14 koz Au (1,401 kt @ 0.32 g/t Au, 9.4 g/t Ag). The company holds a 100% interest in the project. Royalties and streams: 0%.

These figures are extracted from Heliostar Metals Ltd.'s technical disclosures and reflect the most recent Production Update on file. Compare this project against other developers and producers in our project economics database, and always verify the numbers against the original technical report before making any investment decision.

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