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Technical Study

Heliostar Files Preliminary Economic Assessment Technical Report for the Ana Paula Project

Heliostar Formalizes Ana Paula Underground Economics Amid Heavy December Catalyst Flow

By The Northwire Desk — AI Analysis Dec 22, 2025 · 06:31 HSTR · 2.86 Heliostar Metals Ltd.
Executive Summary

The news release dated December 22, 2025, announces that Heliostar Metals has filed the Preliminary Economic Assessment (PEA) Technical Report for its 100% owned Ana Paula Project in Guerrero, Mexico. This filing follows the summary results released on November 6, 2025. The report, prepared by M3 Engineering & Technology Corp. and JDS Energy & Mining, maintains an effective date of November 6, 2025. The document provides the technical and economic basis for an underground mining operation at Ana Paula, supporting the previously announced after-tax NPV5% of US$426 million (base case at $2,400 gold).

Material Impact
  • Most Recent News: The filing itself is a regulatory requirement and provides no new financial or operational data beyond what was shared in the November 6 announcement. Consequently, it is a neutral administrative milestone.
  • Context of 2025 Performance: The filing caps a transformative month for Heliostar. In December 2024/January 2025, the company was an explorer/re-leacher. By December 2025, it has:
  • Restarted primary mining at San Agustin (announced Dec 18).
  • Delivered a robust PFS for Cerro del Gallo with a US$424M NPV (announced Dec 11).
  • Confirmed a permit path for La Colorada expansion (announced Dec 15).
  • Strategic Shift: The company is effectively executing its strategy of using cash flow from high-cost, short-life producing assets (La Colorada/San Agustin) to fund the development of low-cost, high-margin flagship projects (Ana Paula).
HSTR · Price
Company Overview

Heliostar Metals transitioned from a junior explorer to a gold producer in late 2024 through the acquisition of a Mexican portfolio from Florida Canyon Gold/Argonaut. - Flagship Project: Ana Paula (Guerrero, Mexico). A high-grade underground gold project with a PEA showing 101,000 oz/year production at a low AISC of US$1,011/oz. - Producing Assets: La Colorada (Sonora) and San Agustin (Durango). These are open-pit heap leach operations providing immediate cash flow but currently operating with high AISCs (approaching US$2,000/oz).

Read the original news release →

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