Luca Mining Corp. (TSX-V: LUCA) (OTCQX: LUCMF) (Frankfurt: Z68) is pleased to report new high-grade results from its ongoing Phase 2, 5,000 metre underground drill program and the first surface drilling at the Santiago Deposit of the Tahuehueto Gold-Silver Mine in Durango, Mexico.

Highlights include:

• Santiago Deposit: 14.0 m grading 6.68 g/t gold and 6.0 m grading 9.0 g/t gold, the first drilling at Santiago since 2008.
• High-grade intercepts up to 23.1 g/t AuEq over 1.9 m within a broader 5.8 m zone grading 9.0 g/t AuEq.
• Underground drilling continues to hit the Creston and Perdido veins in every hole, confirming continuity and expansion potential.
• New breccia-style zones returned 27.1 g/t AuEq over 0.4 m and 13.1 g/t AuEq over 1.2 m north of current workings.

Figure 1 (CNW Group/Luca Mining Corp.)

Figure 2 (CNW Group/Luca Mining Corp.)

Figure 3 (CNW Group/Luca Mining Corp.)

Santiago Deposit: Strong Start to Surface Drilling
The first two holes at Santiago have exceeded expectations, returning higher grades than those in the current resource model. Located one kilometre from current mine workings, Santiago has never been mined and is open along strike. Six holes have now been completed (1,656 m of a 2,500 m program).

“The Santiago Deposit is a gold-rich part of the Tahuehueto system that has never been mined,” stated Paul D. Gray, VP Exploration. “These are the first drill results from Santiago in more than 16 years, and they clearly demonstrate the potential for new, high-grade resources. Importantly, Santiago trends onto ground we recently acquired, giving us immediate upside in untested areas.”

Underground Drilling: Consistent Vein Continuity
All 27 underground holes drilled to date (6,200 m) have intersected the Creston and Perdido veins, extending known mineralization north of existing workings. Several new breccia zones were discovered, confirming strong continuity of these productive structures and supporting near-mine resource growth.

Next Steps
Both surface and underground drilling are advancing. At Santiago, step-out drilling is targeting strike extensions to the east and west. Underground, Phase 2 drilling continues to focus on adding mineable resources into the near- and medium-term mine plan. Figures 1 and 2 show drillhole locations; Tables 1 and 2 provide assay highlights and collar details.

Table 1: Highlighted Diamond Drill Assay Results from DDH24-225 through DDH25-235 and DDH-25-SGO-001 and DDH-25-SGO-002

*True widths are estimated to be approximately 85% of drilled intervals.

** AuEq equation is: AuEq = Au + (Ag*0.0124) + (Cu%*1.2799) + (Pb%*0.2737) + (Zn%*0.3359), at $2,250 US$/oz
Au, 28 US$/oz Ag, 9,260 US$/Tonne Cu, 1,980 US$/Tonne Pb and 2,430 US$/Tonne Zn, respectively.

Table 2: Drill Collar Locations and Details for Released Results

About 2025 Tahuehueto Exploration Program

The Tahuehueto property comprises a large, epithermal gold-silver vein system comprising 11 kilometres of strike length of known veins and other mineralized structures.  These drill campaigns represent the first substantive exploration drilling on the Property in over 12 years. Mineralization remains open along strike and at depth for most of the modeled Mineral Resource areas.  The objective of the current campaigns will be a combination of in-fill and step-out drilling to demonstrate the vertical and horizontal extent of mineralization as well as to target thick, high-grade mineralized breccia zones known to exist within the epithermal vein system. Recent mining in Level 23 encountered higher grade mineralization averaging 3.30 g/t Au over vein widths up to 20 metres, with values up to 65.04 g/t Au, in breccia zones branching off the main Creston vein (refer to News Release dated May 29, 2024).

In addition to the four veins that comprise the Mineral Resource, there are at least 14 additional prospective veins documented within the concession area that have potential to host additional epithermal Au-Ag(-Cu-Zn-Pb) mineralization. In some cases, these prospective targets may represent extensions of the currently defined Mineral Resource. The Company estimates that there are more than 11 km of prospective vein structures (measured along strike), compared to the 4.5 km of mineralized veins that support the current Mineral Resource model.

Figure 3 below shows the relative location of prospective veins (yellow) and veins modeled for Mineral Resources (red) within the Company’s concession area.

About Luca Mining Corp. 

Luca Mining (TSX-V: LUCA) (OTCQX: LUCMF) (Frankfurt: Z68) is a diversified Canadian mining company with two 100%-owned producing mines within the prolific Sierra Madre mineralized belt in Mexico which hosts numerous producing and historical mines along its trend. The Company produces gold, copper, zinc, silver and lead from these mines that each have considerable development and resource upside.

The Campo Morado polymetallic VMS mine is an underground operation located in Guerrero State.  It produces copper-zinc-lead concentrates with precious metals credits. It is currently undergoing an optimization program which is already generating significant improvements in recoveries, grades, efficiencies, and cashflows.

The Tahuehueto Mine is a large property of over 75 square kilometres in Durango State.  The project hosts epithermal gold and silver vein-style mineralization.  Tahuehueto is a newly constructed underground mining operation producing primarily gold and silver.  The Company has successfully commissioned its mill and is now in commercial production.

Qualified Person

The technical information contained in this news release has been reviewed and approved by Mr. Paul D. Gray, P.Geo., Vice President Exploration at Luca Mining.  Mr. Gray is a Qualified Person for the Company as defined by National Instrument 43-101.

On Behalf of the Board of Directors

(signed) “Dan Barnholden”

Dan Barnholden, Chief Executive Officer

For more information, please visit:  www.lucamining.com