Luca drills 37.2 m of 5.87 g/t Au at Campo Morado

Mr. Dan Barnholden reports LUCA DRILLS 37 METRES OF 6 G/T GOLD, 370 G/T SILVER AND 6% ZINC AT CAMPO MORADO Luca Mining Corp. has released the analytical results from the next six surface drill holes at the Reforma deposit and the next five underground drill holes of the 5,000-metre (m) underground and 2,500 m surface phase 1 exploration drill program at the Campo Morado polymetallic VMS (volcanic massive sulphide) mine in Guerrero state, Mexico: Luca has begun to unlock the gold potential at Campo Morado with consistent high-grade gold intercepts from both the Reforma deposit and in areas immediately adjacent to underground operations. Surface drill hole CMRF25-07 intercepted 37.2 m of 13.85 grams per tonne (g/t) gold equivalent (AuEq) (5.87 g/t gold (Au), 367.50 g/t silver (Ag), 0.53 per cent copper (Cu), 5.54 per cent zinc (Zn) and 2.57 per cent lead (Pb)), including 6.2 m of 43.77 g/t AuEq (20.81 g/t gold, 1,484.20 g/t silver, 0.82 per cent copper, 5.98 per cent zinc and 4.58 per cent lead). Underground drill hole CMUG-25-022 returned assays including 5.5 m of 15.2 g/t AuEq (3.20 g/t gold, 252.6 g/t silver, 2.19 per cent copper, 12.79 per cent zinc and 5.10 per cent lead) from an unmined area within 20 m of current underground workings. Twenty-four underground drill holes totalling 5,070 m were completed as part of the 5,000 m phase 1 program targeting near-mine resource expansion and exploration of untested areas of the Campo Morado mine. The phase 2 program, designed to follow up on positive results and test additional priority targets, will begin shortly. Surface drilling continues at Reforma and El Rey, with 10 drill holes completed at the Reforma deposit. Surface drill holes CMRF-25-02 through CMRF-25-07 were all collared within the Reforma deposit and intersected appreciable intervals of massive sulphide mineralization, including: 6.2 m of 43.77 g/t AuEq (20.81 g/t gold, 1,484.20 g/t silver, 0.82 per cent copper, 5.98 per cent zinc and 4.58 per cent lead) from 237.0 m within a broader interval of 37.2 m of 13.85 g/t AuEq (5.87 g/t gold, 367.50 g/t silver, 0.53 per cent copper, 5.54 per cent zinc and 2.57 per cent lead) from 211.2 m in hole CMRF25-07; 9.9 m of 28.32 g/t AuEq (11.61 g/t Au, 783.90 g/t Ag, 3.51 per cent Cu, 4.56 per cent Zn and 2.91 per cent Pb) from 218.6 m within a broader interval of 39.0 m of 10.05 g/t AuEq (4.09 g/t gold, 304.90 g/t silver, 0.96 per cent copper, 1.27 per cent zinc and 1.74 per cent lead) from 191.6 m in hole CMRF25-06; 5.0 m of 9.13 g/t AuEq (3.56 g/t gold, 196.28 g/t silver, 0.70 per cent copper, 4.43 per cent zinc and 2.24 per cent lead) from 285.5 m in hole CMRF25-03; 3.9 m of 19.78 g/t AuEq (11.23 g/t gold, 342.28 g/t silver, 0.36 per cent copper, 3.95 per cent zinc and 7.55 per cent lead) from 273.8 m within a larger 7.45 m of 12.59 g/t AuEq (6.91 g/t gold, 228.06 g/t silver, 0.37 per cent copper, 2.29 per cent zinc and 4.75 per cent lead) in hole CMRF25-02. These surface holes were drilled across the Reforma deposit to confirm the size, tenor and grade of precious and base metals historically reported, as well as to better define the deposit and test the expansion potential of the Reforma massive sulphide mineralization. Of note is the fact that these holes have returned grades equal to or exceeding historically reported intervals and importantly over larger widths than the geologic model predicted (see table 1). Underground drill holes CMUG-25-17 confirmed mineralization close to the 856 zone of the Southwest zone while CMUG-25-19 through CMUG-25-21 confirmed continuity of mineralization between the Largo zone and anomalous mineralization to the west identified from historical drilling. Drill hole CMUG-25-22 confirmed the extension potential of the Bajo zone mineralization, intersecting mineralization above mine cut-off grades, including 5.5 m of 15.2 g/t AuEq (5.5 m of 3.20 g/t gold, 252.6 g/t silver, 2.19 per cent copper, 5.10 per cent zinc and 12.79 per cent lead) from 158.0 m (downhole) in an unmined area within 20 m of current underground workings (see table 1). Campo Morado hosts several polymetallic massive sulphide deposits containing gold, silver, copper, zinc and lead within a highly prospective land package totalling over 121 square kilometres (km) within the Sierra Madre del Sur mineralized belt. This year's underground exploration campaign represents the first substantive exploration the project and mine has seen since 2014. Paul D. Gray, Lucas vice-president of exploration, commented: "The results from Luca's first drill programs at Campo Morado have exceeded expectations for both drill programs -- successfully advancing Luca's objective to demonstrate the high-grade gold exploration and growth potential of Campo Morado. These wide, consistent, high-grade precious metals drill intercepts, with strong associated base metals, are beginning to demonstrate the exceptional gold and silver potential at Campo Morado, which was not a focus for previous operators of the mine. In addition, current Reforma drilling has returned core recoveries which far exceed those achieved in historical drilling programs, an important improvement that is expected to inform a more accurate representation of the deposit. We anticipate continued exploration success will further unlock the project's full potential. A phase 2 surface drilling program targeting additional high-grade gold is anticipated to begin shortly, while underground and near-mine and exploration efforts will continue to expand mineralization proximal to current mining operations." To date, 24 underground diamond drill holes are complete, totalling 5,070 metres with HQ- and/or NQ-sized diamond drill core at the Campo Morado mine. These underground drill holes are part of the phase 1 underground exploration campaign, which is focused on definition of minable resources near existing mine working, as well as testing new zones interpreted to host extensions of known mineralization based on the property's extensive historical drilling database. In addition, 2,500 m are complete at the Reforma deposit in 10 surface drill holes with HQ- and/or PQ-sized diamond drill core. These surface drill holes represent the phase 1 2,500 m surface drilling campaign at the Reforma and El Rey deposits, designed to confirm and expand the existing mineral resources at both sites, as well as to collect material for additional metallurgical testwork, all with the objective of adding the Reforma and El Rey deposits into an improved Campo Morado mine plan. Based on the strength of the results from surface drilling to date, a phase 2 program has been planned and is anticipated to begin shortly. About the 2025 Campo Morado surface exploration program Luca's inaugural surface drill program is running in parallel with the continuing underground exploration program at Campo Morado. The phase 1 program includes 2,500 m of diamond drilling focused on definition and expansion the Reforma and El Rey deposits, located approximately one kilometre north and east of the main Campo Morado mine, where drilling efforts continue. These deposits host mineral resources (see the company's news release of April 8, 2025), which have not been assessed in any way in over 14 years. Thirty-eight priority targets have been identified from assessment of the substantive historical exploration database of Campo Morado, and ranked based on coincident favourable geological, geochemical and geophysical interpretations. Several of these targets, including Reforma and El Rey, have seen historical exploration, including diamond drilling; however, the majority of the targets remain undrilled. Considering the fertile geologic settling of the large Campo Morado concessions and the camp's prolific discovery history, each of these targets has the potential to host significant VMS mineralization. Luca intends to prioritize and systematically explore the larger Campo Morado concession package in the coming months. Of particular interest with respect to Reforma and El Rey is the marked gold-silver enriched content that has been identified. Metal prices, especially for gold and silver, have significantly increased since Reforma and El Rey were first explored, which presents an extremely attractive value-add opportunity. Luca believes that the precious metal endowment of these and other related mineralized deposits in the camp can add tremendous value to the company's asset base. About the 2025 Campo Morado underground exploration program The current Campo Morado drill campaign represents the first meaningful exploration program carried out on the property since 2014 and is designed to target the addition of mineral resources to the near- and medium-term mine plan at Campo Morado. The company planned 5,000 metres of underground diamond drilling from approximately 25 holes during this first phase of exploration activities. This program's primary target is the definition of additional mineral resources from underdrilled zones proximal to existing underground production areas, as well as the identification of mineralization within previously untested areas with high potential for the discovery of new mineral resources. Previous exploration at Campo Morado has combined to produce an extensive set of high-quality, proprietary geological database, including over 600,000 metres of underground and surface drilling, property-wide geologic/structural mapping, approximately 30,000 geochemical soil samples, and a variety of airborne and ground-based geophysical surveys (including gravity, magnetics, electromagnetics and induced polarization). Analysis of these geophysical survey data sets, particularly gravity, resulted directly in the discovery and definition of mineralized zones on the property and will continue to guide all exploration initiatives; moreover, this large geophysical data set is currently being compiled, cleaned and reinterpreted by Luca in an effort to prioritize the greater than 38 exploration targets identified to date across the property. Analytical method and quality assurance/quality control (QA/QC) measures All drill core splits reported in this news release were analyzed by Bureau Veritas, of Durango, Mexico, utilizing the multi-acid digestion ICP-ES (inductively coupled plasma emission spectroscopy) 35-element MA300 analytical package with FA-430 30-gram fire assay with AAS (atomic absorption spectroscopy) finish for gold on all samples. Au overlimits from FA-430 are reanalyzed by FA530 30-gram fire assay with gravimetric finish. Ag overlimits from ICP MA300 analytical package are reanalyzed by FA530 30-gram fire assay with gravimetric finish. Similarly, Cu, Pb and Zn overlimits from ICP MA300 analytical package are reanalyzed by ICP multiacid digestion MA370 package. All core samples were split by core saw on site at Luca's core processing facilities at the Campo Morado mine. Once split, half were placed back in the core boxes with the other half of split samples sealed in poly bags, with one part of a three-part sample tag inserted within. Samples were collected by Bureau Veritas at the Campo Morado mine site and transported to its laboratory in Durango, where they were prepared into 250-gram pulps for gold fire assay. The pulps were then shipped to Bureau Veritas's analytical laboratory in Vancouver, B.C., for final ICP analysis. A robust system of standards, one-fourth core duplicates and blanks was implemented in the 2025 exploration drilling program and is monitored as chemical assay data become. Qualified person The technical information contained in this news release has been reviewed and approved by Paul D. Gray, PGeo, vice-president of exploration at Luca Mining. Mr. Gray is a qualified person for the company as defined by National Instrument 43-101. About Luca Mining Corp. Luca Mining is a Canadian mining company with two wholly owned mines located in the prolific Sierra Madre mineralized belt in Mexico. These mines produce gold, copper, zinc, silver and lead and generate strong cash flow. Both mines have considerable development and resource upside, as well as world-class exploration potential. The company's Campo Morado mine hosts VMS-style, polymetallic mineralization within a large land package comprising 121 square kilometres. It is an underground operation, producing zinc, copper, gold, silver and lead. The mine is located in Guerrero state. 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 it is now in commercial production. We seek Safe Harbor.