Heliostar Drill Results Strengthen Case for a Mine Life Extension at San Agustin

Heliostar expands San Agustin drilling to 30,000 metres, targeting mine life extension by 2027.

What the company is saying

Heliostar Metals Ltd. is emphasizing the expansion and success of its drilling program at the 100% owned San Agustin Mine in Durango, Mexico, now increased to 25,000–30,000 metres based on positive results. The company frames the narrative around resource growth, highlighting that new drilling in the Corner Expansion and East Wall zones shows grades and widths comparable to current mining operations, with these zones expected to deliver half of a targeted two-year mine life extension. CEO Charles Funk presents the expansion as a direct response to encouraging exploration results, projecting that achieving the 2027 expansion objective would significantly boost cash flow, especially as the Ana Paula project advances toward production. The announcement details ongoing technical work—resource modelling, metallurgy, engineering, and permit modifications—at the new zones, and underscores the use of a US$9.75 million budget and two drill rigs for both resource definition and technical data collection. The company also notes that a technical report was filed on January 14, 2025, and that Stewart Harris, P.Geo., Exploration Manager, is the Qualified Person for this release. A conference call is scheduled for November 13, 2026, to discuss Q3 2026 results and provide further corporate updates.

What the data suggests

The company has completed 217 holes and 22,118 metres of drilling to date in the current program, with the present update covering 164 holes totaling 16,970 metres across four target areas. The drill program budget is US$9.75 million, and the expansion to 25,000–30,000 metres is positioned as necessary to fully test and define additional resource targets. Key intercepts at the East Wall Zone include 94.5 metres at 0.33 g/t AuEq and 100.6 metres at 0.42 g/t AuEq from surface, while the Corner Expansion Zone features a mineralized corridor extending 200 metres beyond the current pit boundary, with new intercepts such as 50.3 metres at 0.37 g/t AuEq and 9.1 metres at 1.19 g/t AuEq. Highlighted intersections include 9.1 metres at 3.34 g/t AuEq, 24.4 metres at 3.44 g/t AuEq, and 36.6 metres at 0.68 g/t AuEq. Grades are calculated using an Au price of $2,150/oz, Ag price of $26/oz, and stated recovery rates. The technical disclosure is detailed, including drill hole IDs, coordinates, and assay methodology, but no updated resource or reserve estimate is provided, and the claim of grades comparable to current mining lacks direct comparative data. The expansion is operationally significant, but the economic impact remains unquantified at this stage.

Analysis

The announcement is upbeat and provides detailed technical data on drilling progress, including specific hole counts, metres drilled, and assay results, which are credible and appropriate for an exploration-stage update. However, several key claims—such as the expectation that new zones will provide 50% of a targeted two-year mine life extension and the completion of expansion objectives in 2027—are forward-looking and contingent on ongoing resource modelling, engineering, and permitting. The US$9.75 million capital outlay is significant, and the main benefits (mine life extension, increased cash flow) are not imminent but projected for 2027 or later, with no guarantee of success. While the technical disclosure is robust, the narrative inflates the certainty of future outcomes (e.g., mine life extension, cash flow impact) that remain unproven at this stage. There is no disclosure of profitability, cash flow, or economic studies to support the implied value creation, and the comparison to 'currently mined grades and widths' is not substantiated with direct data. Overall, the gap between narrative and evidence is moderate: operational progress is real, but the tone overstates the certainty and timing of future benefits.

Risk flags

• ●Resource expansion and mine life extension are not guaranteed; success depends on converting exploration results into compliant resources and reserves, which requires further drilling, modelling, and positive metallurgical outcomes.
• ●Permitting risk is material, as extending the mine life at San Agustin requires permit modifications that are not yet submitted or approved, and regulatory timelines in Mexico can be unpredictable.
• ●The US$9.75 million capital outlay for the expanded drill program is significant for a junior producer, and the return on this investment is uncertain until resource and reserve upgrades are confirmed.
• ●Forward-looking statements about cash flow growth and mine life rely on successful execution of multiple technical and regulatory steps, none of which are assured; delays or negative results could materially impact the expansion timeline and value proposition.
• ●The company claims grades and widths similar to current mining but does not provide direct comparative data, making it difficult to independently assess the true economic potential of the new zones.

Bottom line

Heliostar's expanded US$9.75 million drilling campaign at San Agustin is a substantial operational step, with 217 holes and 22,118 metres drilled to date and a target of 25,000–30,000 metres by 2027. The technical disclosure is robust, with detailed intercepts and clear program objectives, but the economic case for mine life extension remains unproven until resource and reserve estimates are updated and permits are secured. The company's narrative is optimistic, projecting that new zones could deliver half of a two-year mine life extension and meaningfully boost future cash flow, but these outcomes depend on successful technical and regulatory execution. Investors should focus on the delivery of compliant resource/reserve upgrades, progress on permitting, and evidence that the new mineralization is economically viable. The most important takeaway is that while operational progress is real and well-documented, the path to value creation is multi-step and subject to execution and permitting risks.

Announcement summary

(TSX:HSTR) (OTCQX:HSTXF) (FSE:RGG1) Heliostar Metals Ltd. announced additional drilling results from its 100% owned San Agustin Mine in Durango, Mexico. The company has increased its ongoing resource and exploration drilling programs to 25,000-30,000 metres based on successful results to date. The primary aim of the program is to find additional oxide resource ounces to support an extension of the mine life. CEO Charles Funk stated that the new results build on positive exploration results reported earlier in the year, with drilling defining multiple zones including the Corner Extension and newly reported East Wall zones, which have similar grades and widths to currently mined gold mineralization. Resource modelling, metallurgical assessment, engineering design, and permit modifications are ongoing at these two zones, which are expected to provide 50% of the targeted two-year additional mine life at San Agustin. The company has doubled the size of the ongoing drill program to complete the expansion objective in 2027. To date, Heliostar has completed 217 holes and 22,118 metres in the current program, testing nine near-mine target areas. The current release covers results from 164 holes totaling 16,970 metres from four target areas: Corner Expansion, Phase 3 East, Phase 5, and East Wall zones. The US$9.75 million drill program has been expanded to define the full extent of additional resource targets. Drilling is being conducted with two rigs: a reverse circulation rig for resource definition and a core drill rig for resource information, rock strength, hydrogeologic data, and metallurgical samples. At the Corner Expansion Zone, drilling has defined a mineralized corridor extending 200 metres from the current pit boundary, with new intercepts in holes 25-SAGRC-795 and -796 indicating a second open zone of mineralization. At the East Wall Zone, key intercepts include 26-SAGRC-810 (94.5 m at 0.33 g/t AuEq from surface) and 26-SAGRC-815 (100.6 m at 0.42 g/t AuEq from surface), with mineralization extending 150 metres east from the pit wall and remaining open. Highlighted drill intersections include 26-SAGRC-800 (9.1 m at 3.32 g/t Au, 12.9 g/t Ag, 3.34 g/t AuEq), 26-SAGRC-877 (24.4 m at 3.44 g/t Au, 2.1 g/t Ag, 3.44 g/t AuEq), and 26-SAGRC-888 (36.6 m at 0.67 g/t Au, 6.0 g/t Ag, 0.68 g/t AuEq). The AuEq grades were calculated using an Au price of $2,150 USD per ounce, Ag price of $26 USD per ounce, Au recovery (oxide) of 66%, Au recovery (transition) of 38%, Ag recovery (oxide) of 10%, and Ag recovery (transition) of 10%. Drilling coordinates for highlighted holes include Easting values such as 539,789, 539,858, 540,055, 539,995, 540,152, 540,053, 540,076, 540,195, 540,033, 540,219, 540,212, 540,174, 540,128, 540,239, 540,336, 540,283, and Northing values such as 2,741,210, 2,741,212, 2,741,085, 2,741,147, 2,741,307, 2,741,022, 2,740,997, 2,741,220, 2,741,297, 2,741,240, 2,741,206, 2,741,278, 2,741,244, 2,741,183, 2,741,158, 2,741,069. Heliostar filed the technical report "San Agustin Operations, Durango State, Mexico, NI 43-101 Technical Report" on SEDAR+ on January 14, 2025. Stewart Harris, P.Geo., Exploration Manager, is the Qualified Person who reviewed and approved the technical information in this release. Heliostar will host a conference call on Friday, November 13, 2026, at 11:00 AM EST/9:00 AM PDT to provide a corporate update following the release of Q3 2026 financial and operating results.

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