Sego Resources Intercepts Porphyry-Related Phyllic Alteration at Cuba Zone, 1200 m Northeast of the Billy Zone Porphyry Copper Discovery Made in December 2025

Rhea-AI Summary

Sego Resources (OTC: SGOZF) reported that drill hole DDH25-71 at the Cuba Zone intercepted a classic porphyry-related phyllic alteration halo and locally observed quartz stockwork and pyrite. Patchy potassic (K-feldspar) alteration begins at 542.93 m and continues to the end of hole at 586.64 m.

Magnetic susceptibility rose sharply at 560 m and remained high to very high from 560 m to 588 m. Core logging is complete and samples are being prepared for shipment to the lab in Calgary.

Positive

• Porphyry-related phyllic alteration intercepted in DDH25-71
• Patchy potassic alteration from 542.93 m to 586.64 m
• Consistently high magnetic susceptibility from 560 m to 588 m

Negative

• No assay results released yet; samples are only being prepared for shipment

Vancouver, British Columbia--(Newsfile Corp. - February 2, 2026) - Sego Resources Inc. (TSXV: SGZ) ("Sego" or "the Company") is pleased to announce that a classic, porphyry-related phyllic alteration zone was intercepted in drill hole DDH25-71, that was drilled at company's Cuba Zone (Figure 1), which is located 1200 meters northeast of the South Gold Zone, now part of a larger Billy Zone.

Figure 1. Geologic map of Cuba Zone (red), with traces of DDH25-71, DDH-MM-18-37 and DDH-MM-34 drill holes. 

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Drill hole DDH25-71 was based on earlier copper intercepts from drill holes DDH-MM-18-37 and DDH-MM-18-34. The purpose of this drill hole was to explore potentially deeper, structurally controlled porphyry copper mineralization.

Figure 2. Longitudinal section looking northeast, showing the drill hole DDH25-71 and drill holes MM-18-37 and MM-18-34 with projected drill results.

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Pyrite is present within the phyllic altered zone, being mostly fine and disseminated, with occasional stringers and veinlets.

Quartz stockwork was also observed locally (Figure 3).

Based on geological observations from this hole, the next Cuba zone drill hole can be drilled from the northeast, which could intercept the mineralized zone earlier.

A

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B

Figure 3. Examples of quartz stockwork in DDH25-71 drill core. 35 cm long HQ core.

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Phyllic alteration is very important in the exploration for copper porphyry deposits, as it often defines a halo or a shell surrounding the central, potassic (K-feldspar/biotite) alteration zone.

Patchy potassic (K-feldspar) alteration was also intercepted, in the lowermost part of drill hole DDH25-71, starting at 542.93 m, and extending until the end of the drill hole at 586.64 m, gradually increasing in its size and intensity with increasing depth.

Below 577.68 m, and especially between 580.84 m and 586.64 m (end of drill hole, Figure 4), the core looks similar in its appearance (patchy potassic, K-feldspar alteration and brecciated nature) to the best mineralized intervals of MM-18-37 drill hole, which were also at the very end of drill hole MM-18-37, from 225 m to 233 m (final depth).

Magnetic susceptibility readings in drill hole DDH25-71 made a very sharp, big increase at 560 m, compared to earlier readings. All magnetic susceptibility readings from 560 m to 588 m (measured at every meter) were high to very high.

Figure 4. Patchy potassic (K-feldspar alteration) at 582.50 m-583.70 m in drill hole DDH25-71.

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Core logging has been completed, with ongoing core cutting and samples being prepared for shipping to the lab in Calgary.

Qualified Person

The technical information in this news release has been reviewed and approved by Goran Markovic, MSc., P.Geo., who is a Qualified Person under the definitions established by NI 43-101, and is an Independent Consulting Geologist commissioned by Sego Resources Inc.

J Paul Stevenson, CEO, Director
For further information please contact:
J. Paul Stevenson, CEO
(604) 682-2933
ceo@segoresources.com

Neither the TSX Venture Exchange nor its Regulation Services Provider (as that term is defined in the policies of the TSX Venture Exchange) accepts responsibility for the adequacy or accuracy of this release. No regulatory authority has approved or disapproved the information contained in this news release.

This release includes certain statements that may be deemed "forward-looking statements". All statements in this release, other than statement of historical facts that address future production, reserve potential, exploration drilling, exploitation activities and events or developments that the Company expects re forward-looking statements. Although the Company believes the expectations expressed in such forward-looking statements are based on reasonable assumptions, statements are not guarantees of future performance and actual results or developments may differ materially from the forward-looking statements. Factors that could cause actual results to differ materially from those in forward-looking statements include market prices, exploitation and exploration successes, continued availability of capital and financing, general economic, market or business conditions. Investors are cautioned that any such statements are not guarantees of future performance and those actual results or developments may differ materially from those projected in the forward-looking statements.

To view the source version of this press release, please visit https://www.newsfilecorp.com/release/282409

FAQ

What did Sego Resources (SGOZF) announce about DDH25-71 on February 2, 2026?

They announced interception of a porphyry-related phyllic alteration zone in DDH25-71 with quartz stockwork and pyrite. According to the company, patchy potassic alteration occurs from 542.93 m to 586.64 m and core samples are being readied for lab shipping.

How far is the Cuba Zone drill hole DDH25-71 from the Billy Zone discovery (SGOZF)?

DDH25-71 is located approximately 1,200 metres northeast of the South Gold Zone now part of the Billy Zone. According to the company, the Cuba Zone lies along the same regional trend being systematically drill-tested for porphyry-style mineralization.

What key geological indicators did Sego report from DDH25-71 (SGOZF)?

Key indicators were phyllic alteration, local quartz stockwork, disseminated pyrite and patchy potassic alteration near hole end. According to the company, magnetic susceptibility increased sharply at 560 m and remained high to very high to 588 m.

When will Sego (SGOZF) release assay results for the Cuba Zone DDH25-71 samples?

The company has completed core logging and is preparing samples for shipment to a Calgary lab; no assay release date was provided. According to the company, assays will follow standard lab turnaround after samples arrive and are processed.