Sable Hits High-Grade Copper at Pyros, Fueling Argentina Mining Hopes

VANCOUVER, British Columbia – April 13, 2026 – Junior explorer Sable Resources Ltd. has announced significant drill results from its El Fierro Project in Argentina, revealing high-grade copper, gold, and molybdenum intercepts that substantially expand the known mineralization at its Pyros porphyry system. The findings, which include a notable high-grade zone, are bolstering confidence that the project could evolve into a major discovery within one of South America's most promising mining jurisdictions.

The latest drill program, funded by partner Moxico Resources plc, has successfully extended the mineralized footprint to an impressive 720 by 580 meters. More importantly, it has confirmed the presence of rich, concentrated zones of mineralization, a key indicator of economic potential. The results have been met with a positive market reaction, with Sable's stock (TSXV: SAE) climbing 10% on the news, as investors recognize the growing scale of the discovery.

A High-Grade Discovery in a Prolific Region

The highlight of the 11-hole, 3,466-meter program is a remarkable intercept from hole FZ-DH-25-92. This hole, which was an extension of a previous hole that ended in mineralization, returned a high-grade interval of 8 meters grading 3.06% Copper Equivalent (CuEq). This included 1.03% copper (Cu), 0.51 grams per tonne (g/t) gold (Au), and 0.27% molybdenum (Mo). This high concentration of metals is part of a broader mineralized zone of 189.1 meters at 0.50% CuEq.

To put these numbers in perspective, large-scale porphyry deposits, which are the world's primary source of copper, often have average grades of less than 1.0% copper. The discovery of such a high-grade core within the Pyros system is a significant technical achievement. It suggests the presence of a robust mineralizing system with the potential for economically attractive zones. These results compare favorably to the early-stage discoveries of other major deposits in the region. For instance, world-class projects in the nearby Vicuña district, such as Filo Mining's Filo del Sol, built their resource on the back of identifying both large, lower-grade halos and internal high-grade feeder zones.

Dr. Ruben Padilla, President and CEO of Sable Resources, commented on the findings, stating, “Based upon these and prior results, mineralization at Pyros follows a well-defined ring-shaped geometry, which has now been confirmed by multiple drill holes. This drilling has significantly improved our understanding of the system, which is evolving into a large and coherent mineralized porphyry system with defined higher-grade zones that remain open for expansion.”

The geological model now shows a large, ring-shaped mineralized body surrounding a less-mineralized core. This classic porphyry model helps geologists predict where the most valuable mineralization might be concentrated, guiding future exploration efforts with greater precision.

De-Risking Discovery: The Moxico Partnership

A critical element of Sable's recent success is its strategic partnership with Moxico Resources plc. Under an earn-in agreement established in February 2025, Moxico fully funded the latest drill program, providing the capital necessary for Sable to aggressively test the Pyros system. This type of agreement is a common and effective strategy in the mining industry, allowing junior explorers with promising ground to partner with better-funded companies to de-risk and advance projects without excessively diluting their shareholders.

Moxico's continued investment underscores its confidence in the project's potential. According to Dr. Padilla, “Sable’s partner Moxico is encouraged by the results and quality of the systematic work completed by the Sable team.” This strong partnership provides a stable financial foundation for the project's next phase, which will involve more extensive drilling to expand the known high-grade zones and test new targets.

This collaboration allows Sable to leverage its exploration expertise while mitigating the immense financial risk associated with large-scale drill programs. For Moxico, it provides a strategic entry into a potentially significant new discovery in a top-tier jurisdiction. The success of this partnership serves as a blueprint for funding future discoveries, ensuring that promising projects like Pyros have the resources needed to progress toward development.

San Juan's Mining Renaissance and the Pyros Potential

The Pyros discovery is not happening in isolation. It is situated in Argentina's San Juan Province, a region rapidly gaining a reputation as a stable and pro-mining jurisdiction. The project lies just 120 kilometers south of the prolific Vicuña district, a geological belt that hosts several world-class copper and gold deposits. This proximity is significant, as it places Pyros within a geological trend known for producing giant mineral systems.

The geology at Pyros—a Miocene-age porphyry system—is consistent with that of its larger neighbors, reinforcing the belief that it belongs to the same family of major deposits. The system remains open for expansion to the north and south, where strong surface geochemical anomalies and favorable alteration patterns suggest the mineralization continues well beyond the currently drilled area. Future work will focus on these untested zones, with the potential to significantly increase the project's overall size and scale.

The growing importance of San Juan as a mining hub also brings potential advantages in infrastructure and government support. As more companies invest in the region, the development of roads, power, and a skilled local workforce accelerates, creating a more favorable environment for transforming a discovery into a producing mine.

While the technical results are promising, the path from discovery to production is long and requires navigating a complex landscape of regulatory, environmental, and social considerations. Success in San Juan will depend not only on the quality of the rock but also on building strong community relationships and adhering to the highest standards of environmental stewardship. For Sable and its partner Moxico, the next phase of drilling will be crucial in determining if Pyros can evolve from a promising discovery into one of the region's next major mining assets.