# Luca Intersects 6.8 Metres of 5.5 g/t Gold Equivalent at Tahuehueto Mine - Further Expanding High-Grade Mineralization Proximal to Existing Workings *2026-05-05T06:00:00-04:00* Luca Intersects 6.8 Metres of 5.5 g/t Gold Equivalent at Tahuehueto Mine - Further Expanding High-Grade Mineralization Proximal to Existing Workings Luca Intersects 6.8 Metres of 5.5 g/t Gold Equivalent at Tahuehueto Mine - Further Expanding High-Grade Mineralization Proximal to Existing Workings PR Newswire VANCOUVER, BC, May 5, 2026/PRNewswire/ -**Luca Mining Corp.**("Luca" or the "Company") (TSX-V: LUCA; OTCQX: LUCMF; Frankfurt: Z68) reports new assay results from its ongoing 2026 drilling program at the Tahuehueto gold-silver mine in Durango, Mexico. Exploration drilling has continued to intersect high-grade gold mineralization in newly identified breccia zones, close to current mine workings, confirming continuity of breccia-hosted mineralization within the Creston vein system and confirming potential for near-mine resource expansion. It is anticipated that portions of these newly identified mineralized breccia zones can be readily included in resource models at the mine and be brought into production within one year. Additionally, drill testing of the El Rey vein, which has not been mined since 1983 and has not been explored in any capacity for over 20 years, identified mineralized breccia zones – elevating the priority of the El Rey target and underscoring the mineral endowment of the Tahuehueto land package. Two contracted diamond drill rigs are currently operating on site, with one dedicated to underground drilling and one to surface drilling. A Luca-owned and operated underground drill rig has also been added as the exploration campaign continues to grow. This expanded drill program reflects the Company's increased 2026 exploration budget at Tahuehueto, with an additional $2.4 million planned to be invested over the balance of the year. **Highlights** - High-grade intercepts from surface drill holes targeting the Creston Vein, including: - - **6.8 metres ("m") of 5.54 g/t ****_AuEq**_**(4.08 g/t Au, 58.79 g/t Ag, 0.71% Cu, 0.74% Pb, 1.19% Zn)in hole DDH26-SU-07 including **1.0 m of 22.35 g/t ****_AuEq_**(20.20 g/t Au, 72.70 g/t Ag, 1.13% Cu, 0.78% Pb, 2.65% Zn) - **4.5 m of 4.50 g/t ****_AuEq_**(2.23 g/t Au, 60.00 g/t Ag, 0.87% Cu, 2.16% Pb and 4.68% Zn) in hole DDH26-SU-04 including 2.6 m of 5.59 g/t _AuEq_(2.19 g/t Au, 89.88 g/t Ag, 1.35% Cu, 3.26% Pb and 6.72% Zn) - **2.5 m of 3.57g/t ****_AuEq_**(2.46 g/t Au, 32.34 g/t Ag, 0.32% Cu, 1.15% Pb and 2.60% Zn) in hole DDH26-SU-10, including**1.3 m @ 4.94 g/t ****_AuEq_**(4.02 g/t Au, 22.70 g/t Ag, 0.30% Cu, 1.11% Pb and 2.14% Zn) - Demonstrated continuity of mineralization confirmed in unmined areas from 10 to 70 m below Level 23, extending known high-grade breccia zones - These intercepts exceed current mined grades and occur within development distance of existing underground infrastructure and are planned to be developed in the medium term - Verified and expanded brecciated vein-related mineralization at the El Rey target: - **3.3 m of 3.04 g/t ****_AuEq_**(0.59 g/t Au, 88.54 g/t Ag, 0.12% Cu, 4.84% Pb and 5.60 % Zn) in hole DDH26-239, including **1.0 m @ 7.48 g/t ****_AuEq_**(0.71 g/t Au, 207.00 g/t Ag, 0.33% Cu, 14.09% Pb, 17.79% Zn) - Results continue to validate the geologic model and highlight the expansion potential of these pervasive and consistent mineralized structures - Two contracted diamond drill rigs are currently on site, one dedicated to underground drilling and one to surface drilling. A Luca owned and operated underground rig was added to the project this season as the exploration campaign grows _"This latest round of surface drilling further confirms that high-grade breccia zones within the Creston Vein system remain unmined below current workings, and are expected to be included into near- and medium-term mine plans at Tahuehueto,"_said Paul D. Gray, VP Exploration. _"Additionally, the EL Rey vein, an area not mined nor drill tested in over 20 years, was successfully intersected in every underground drillhole. This highlights the wealth of under-evaluated targets with potential unmined strike extensions which the Company is systematically testing to support the addition of new mineral resources into the near, medium and long term Tahuehueto mine plan."_ **Drill Results Summary** Drillholes DDH26-SU-04 through DDH26-SU-013 targeted a previously untested zone approximately 30-40 metres below active mine workings on Level 23 and along strike from Luca's successful Phase 1 2024-2025 underground drill program (See Company News Releases Dated February 20, 2025 and March 5, 2026). All drillholes (with the exception of DDH26-SU-09 and DDH26-SU-13) intersected the Creston or El Rey vein structures in well-developed brecciated veins and confirm strike continuity of the high-grade breccia zone identified in prior drilling, on strike and down plunge. To date, Luc