05:30 PM EDT, 09/25/2025 (MT Newswires) -- Endeavour Silver ( EXK ). (EDR.TO, EXK) was at last look up 0.8% in U.S. after-hours trade Thursday as it announced "positive" drill results from its ongoing exploration program at the Kolpa Mine, located in Peru's Huancavelica province.

A statement noted the area is marked by sub-vertical geological structures formed by compressive forces associated with the Andean Orogeny. These forces have created "well-developed vein systems trending southwest to northeast, which are significant for guiding mineralization", it also noted.

"Importantly," the statement said, "these structural patterns can repeat and extend across neighboring vein sets that are oriented differently. This creates adjoining sequences-referred to as 'structural pairing'-that enhance the potential for mineral discovery. The company has successfully identified corridors where these structural pairings occur, targeting prospective areas for brownfields exploration."

Within Corridor 3, the company said it carried out drilling on the Poderosa West and Caudalosa Chica veins, targeting the establishment of mineral resources. The Poderosa West vein, previously identified through both surface outcrops and earlier drilling, has now been mapped at surface for approximately 2.5 kilometers. Since acquiring the project, Endeavour added it has completed 14 drill holes totaling 2,343 meters near existing underground workings, intersecting significant zones of mineralization.

Key highlights from this program include: 247 gpt Ag, 0.77% Pb, 10.70% Zn and 0.55% Cu over 8.20 meters estimated true width in hole DDH-H1-25-88; and 266 gpt Ag, 1.34% Pb, 4.73% Zn and 0.23% Cu over 5.15 meters estimated true width in hole DDH-H1-25-92.

Additionally, Thursday's statement noted, Caudalosa Chica has been mapped for over 1.5 kilometers where three drill holes were completed in July and August, two intersected significant mineralization.

The company said management is currently evaluating both surface exploration and recent drill results to design a "comprehensive, systematic exploration program" at the Kolpa Mine. At Poderosa West, it added, ongoing underground development is facilitating access for new underground drill stations, which will support further step-out drilling. Additionally, the company has submitted applications for surface drilling along the entire 2.5-kilometer vein. Drilling activity in Corridor 3, targeting these two key structures, is scheduled to resume in late Q4 2025.

"Kolpa's geology continues to demonstrate outstanding potential, with multiple underexplored targets that point to a long runway of discovery," said Dan Dickson, Chief Executive Officer. "We are only scratching the surface and the opportunity to unlock further value through exploration is both exciting and significant. The latest results highlight the exploration potential for Kolpa and the hard work that the team has put into this asset."