Eloro Resources Intersects Highest Silver Interval to Date at its Iska Iska project, Southern Bolivia with 72 metres grading 294.81 g/t Silver within a broader interval of 180 metres grading 164.74 g/t Silver in Hole DSB-93

2025-12-09

Highlights:

Eloro's second phase definition diamond drilling program has now been completed with sixteen (16) drill holes drilled totalling 8,286.40 metres across the potential starter pit area (1,000m by 600m by 500m deep). The program has succeeded in confirming continuity and expanding higher-grade silver-tin-polymetallic mineralization in this extensive porphyry-epithermal system.

DSB-93 , an infill hole drilled 107m northeast of discovery hole DSB-61, intersected the highest silver interval obtained thus far at Iska Iska with 72.00 metres grading 294.81g/t Silver (Ag) and 0.44% Lead (Pb) beginning at 131.70m, within a broader interval of 180.00m grading 165g/t Ag, 0.74% Pb, 0.72% Zinc (Zn) and 0.16% Tin (Sn) beginning at 112.20m. Previously, the highest-grade silver interval was 62.84m grading 279.22 g/t Ag, beginning at 87.44m, in drill hole DSB-61, located 107m southwest of hole DSB-93. This intersection also contained 0.47% Pb and 0.43% Sn (see Eloro Press Release dated December 18, 2023).

Hole DSB-93 also intersected the following well mineralized intervals:

28.50m grading 0.84g/t Au, 253.63g/t Ag, 1.10% Pb and 0.57% Sn beginning at 223.20m 33.00m grading 0.18% Sn beginning at 374.70m 7.50m grading 1.43% Cu beginning at 34.20m 7.50m grading 1.25% Zn beginning at 49.20m 6.00m grading 0.54% Pb and 3.09% Zn beginning at 86.70m 8.80m grading 1.45% Zn beginning at 416.70m 3.00m grading 1.68% Zn beginning at 101.70m

DSB-90 , an infill hole collared 100m east of discovery hole DSB-72 intersected a higher-grade tin section of 51.00m grading 0.24% Sn beginning at 400.00m and a higher-grade silver section of 13.50m grading 106.32g/t Ag and 0.16% Sn beginning at 256.00m, including 7.50m grading 186.50g/t Ag and 0.14% Sn beginning at 256.00m.

Hole DSB-90 also intersected higher-grade tin sections of:

24.00m grading 0.57% Sn beginning at 91.00m 16.50m grading 0.36% Sn beginning at 134.50m 22.50m grading 0.20% Sn beginning at 311.50m including 10.50m grading 0.29% Sn beginning at 311.50m 19.50m grading 0.16% Sn beginning at 338.50m 13.50m grading 0.24% Sn beginning at 380.50m

_Note: __True width is approximately 80% of core length. _

TORONTO, Dec. 09, 2025 (GLOBE NEWSWIRE) -- Eloro Resources Ltd. (TSX: ELO; OTCQX: ELRRF; FSE: P2QM) (“Eloro”, or the “Company”) is pleased to announce assay results from the last two (2) drillholes (DSB-90 and DSB-93) of the second phase definition diamond drilling program at the Company’s Iska Iska Project, Potosi Department, Southern Bolivia. These two holes were in the predominant Tin Domain and the predominant Silver-Polymetallic Domain, respectively, in the potential Santa Barbara starter pit area. These results further expand the higher-grade footprint of both metal domains (see Figure 1). The current phase of the definition drilling phase has now concluded with a total of 8,286.40m of diamond drilling in sixteen (16) holes completed.

Figure 1 shows the location of the reported drill holes, Table 1 lists significant assay results, and Table 2 lists drill hole coordinates. Table 3 provides an overall summary of the main intervals reported in the second phase definition diamond drilling program.

Tom Larsen, Eloro’s CEO, commented: “The second phase definition drilling program not only intersected the longest and highest-grade silver, tin and zinc intervals at the Santa Barbara zone to date, but also, all sixteen holes in the program, comprising 12 step-out and 4 infill holes, intercepted significant silver-tin-polymetallic mineralization in areas previously considered as waste in the initial Mineral Resource Estimate (“MRE”) due to lack of drilling information. The latest drilling demonstrates that there is a much larger endowment of higher-grade silver-tin-polymetallic both laterally and at depth, which will likely upgrade and expand the MRE for the planned PEA.” Mr. Larsen continued: “With the overall results obtained so far, Iska Iska continues to confirm its future participation as a premier silver-tin-polymetallic resource supporting the global shift toward the world´s critical minerals supply chain.”

Dr. Osvaldo Arce, P.Geo., Eloro’s Executive Vice President Operations, Latin America, added: “The results obtained in drill holes DSB-90 and DSB-93 confirm the presence of a higher-grade silver-tin-polymetallic mineralization, distributed laterally and vertically, in a major porphyry-epithermal system extending beyond the existing limit of the potential starter pit. These results confirm the system's extension nature and highlight the long-lived and multi-phase deformation and hydrothermal activity at the Santa Barbara deposit.”

Definition Drill Program, Santa Barbara Potential Starter Pit Area

Drillholes DSB-90 and DSB-93 were drilled in the central predominant tin domain and in the predominant silver-polymetallic domain, respectively (Figure 1).

DSB-90 , an infill hole collared 100m east of discovery hole DSB-72 intersected the following tin and silver intervals:

24.00m grading 0.57% Sn beginning at 91.00m 16.50m grading 0.36% Sn beginning at 134.50m 6.00m grading 0.11% Sn beginning at 199.00m 13.50m grading 106.32g/t Ag and 0.16% Sn beginning at 256.00m, including: 7.50m grading 186.50g/t Ag and 0.14% Sn beginning at 256.00m.

Further downhole, DSB-90 intersected the following intervals:

3.00m grading 0.14% Sn beginning at 289.00m 22.50m grading 0.20% Sn beginning at 311.50m including 10.50m grading 0.29% Sn beginning at 311.50m

19.50m grading 0.16% Sn beginning at 338.50m 13.50m grading 0.24% Sn beginning at 380.50m 51.00m grading 0.24% Sn beginning at 400.00m 9.00m grading 0.16% Sn beginning at 464.50m 6.00m grading 31.85 g/t Ag beginning at 499.00m

DSB-93 , an infill hole drilled 107m southwest of discovery hole DSB-61, intersected the following silver, gold, copper, lead and zinc intervals:

7.50m grading 1.43% Cu beginning at 34.20m 7.50m grading 1.25% Zn beginning at 49.20m 6.00m grading 0.54% Pb and 3.09% Zn beginning 86.70m 3.00m grading 1.68% Zn beginning at 101.70m 180.00m grading 164.74g/t Ag, 0.74% Pb, 0.72% Zn and 0.16% Sn beginning at 112.20m including: 72.00 metres grading 295.00g/t Ag and 0.44% Pb beginning at 131.70m

Further downhole, DSB-93 intersected:

28.50m grading 0.84g/t Au, 253.63g/t Ag, 1.10% Pb and 0.57% Sn beginning at 223.20m 33.00m grading 0.18% Sn beginning at 374.70m 8.80m grading 1.45% Zn beginning at 416.70m

Figure 1: Location Map of Definition Diamond Drill Holes, Santa Barbara zone, Iska Iska. The yellow circles highlight the location of holes DSB-90 and DSB-93 referred to in this release.

Table 1: Definition Diamond Drill Results as of December 04, 2025, Santa Barbara, Iska, Iska.

| Hole No. | From (m) | To (m) | Length (m) | Ag | Zn | Pb | Sn | Ag eq. | | g/t | % | % | % | g/t | | | | | | DSB-90 | 91.00 | 115.00 | 24.00 | 1.26 | 0.00 | 0.01 | 0.57 | 113.40 | | | 134.50 | 151.00 | 16.50 | 4.52 | 0.00 | 0.02 | 0.36 | 73.97 | | | 199.00 | 205.00 | 6.00 | 8.70 | 0.00 | 0.05 | 0.11 | 29.95 | | | 256.00 | 269.50 | 13.50 | 106.32 | 0.00 | 0.08 | 0.16 | 127.34 | | Incl. | 256.00 | 263.50 | 7.50 | 186.50 | 0.00 | 0.09 | 0.14 | 192.73 | | | 289.00 | 292.00 | 3.00 | 12.25 | 0.01 | 0.17 | 0.14 | 41.51 | | | 311.50 | 334.00 | 22.50 | 7.64 | 0.02 | 0.04 | 0.20 | 48.46 | | Incl. | 311.50 | 322.00 | 10.50 | 12.03 | 0.04 | 0.09 | 0.29 | 71.00 | | Incl. | 326.50 | 334.00 | 7.50 | 5.82 | 0.01 | 0.01 | 0.19 | 42.32 | | | 338.50 | 358.00 | 19.50 | 25.18 | 0.01 | 0.10 | 0.16 | 56.68 | | | 380.50 | 394.00 | 13.50 | 20.74 | 0.01 | 0.02 | 0.24 | 66.81 | | | 400.00 | 451.00 | 51.00 | 2.06 | 0.01 | 0.01 | 0.24 | 49.47 | | | 464.50 | 473.50 | 9.00 | 7.67 | 0.06 | 0.02 | 0.16 | 40.49 | | | 499.00 | 505.00 | 6.00 | 31.85 | 0.22 | 0.02 | 0.04 | 43.34 | | DSB-93 | 34.20 | 41.70 | 7.50* | 0.50 | 0.05 | 0.06 | 0.01 | 4.99 | | | 49.20 | 56.70 | 7.50 | 1.00 | 1.25 | 0.26 | 0.06 | 60.99 | | | 86.70 | 92.70 | 6.00 | 1.00 | 3.09 | 0.54 | 0.03 | 122.86 | | | 101.70 | 104.70 | 3.00 | 0.50 | 1.68 | 0.21 | 0.05 | 70.86 | | | 112.20 | 292.20 | 180.00 | 164.74 | 0.72 | 0.74 | 0.16 | 217.46 | | Incl. | 131.70 | 203.70 | 72.00 | 294.81 | 0.21 | 0.44 | 0.06 | 288.25 | | Incl. | 223.20 | 251.70 | 28.50 | 253.63 | 0.45 | 1.10 | 0.57 | 374.02 | | | 374.70 | 407.70 | 33.00 | 12.73 | 0.17 | 0.28 | 0.18 | 58.81 | | | 416.70 | 425.50 | 8.80 | 20.42 | 1.45 | 0.19 | 0.07 | 84.27 | | | | | | | | | | |

Note: True width is approximately 80% of core length. Silver equivalent (Ag eq) grades are calculated using 3-year average metal prices of Ag = US$24.14/oz, Zn = US$1.36/lb, Pb = 0.98/lb, and Sn = US$13.74/lb, and preliminary metallurgical recoveries of Ag = 88%, Zn = 87%, Pb = 80% and Sn = 50%. In selecting intervals, a cutoff grade of 30 g Ag eq/t has been used. Lower grade material may be included in intersections where geological continuity is warranted.

*Interval also assayed 1.43% Cu. Interval also assayed 0.84 g/t Au

Table 2: Summary of Diamond Drill Hole Coordinates for Drill Holes Completed at Iska Iska as reported in this Press Release

| Hole No. | Type | Collar Easting | Collar Northing | Elevation | Azimuth | Angle | Hole length (m) | | DSB-90 | S | 205182 | 7656125 | 4328 | 235° | -85° | 514.00 | | DSB-93 | S | 205372 | 7656171 | 4224 | 230° | -60° | 425.50 | | | | | | | | Subtotal | 939.50 |

Table 3: Main Intervals in the Second Phase Definition Diamond Drilling

| Date | Drillhole ID | Category | Az. (°) | Dip (°) | Length (m) | Main Intervals | | 08-06-25 | DSB-78 | Step-out | 225 | -85 | 554.60 | 79.50m @ 0.40% Sn beginning at 319.60m, incl. 16.50m @ 0.89% Sn beginning at 366.60m | | 08-06-25 | DSB-79 | Step-out | 225 | -85 | 500.30 | 43.50m @ 52.73 g/t Ag beginning at 214.10m, incl. 3.0m @ 401.65 g/t Ag beginning at 244.10m | | 09-16-25 | DSB-80 | Step-out | 225 | -85 | 551.30 | 15.00m @ 53.10 g/t Ag beginning at 340.50m; 10.50m @ 34.50 g/t Ag beginning at 460.50m | | 08-06-25 | DSB-81 | Step-out | 225 | -85 | 608.60 | 57.00m @ 0.18% Sn beginning at 9.60m, incl. 6.00m @ 0.33% Sn beginning at 9.60m and 6.00m @ 0.32% Sn beginning at 44.10m | | 08-06-25 | DSB-82 | Step-out | 225 | -85 | 650.30 | 15.00m @ 0.16% Sn and 14.19 g/t Ag beginning at 97.80m; 12.00m @ 0.23% Sn beginning at 472.80m | | 08-06-25 | DSB-83 | Step-out | 225 | -85 | 557.60 | 31.50m @ 39.43 g/t Ag beginning at 52.30m, incl. 25.50m @ 43.53 g/t Ag; 25.50m @ 51.24 g/t Ag beginning at 313.50m, incl. 13.50m @ 69.22 g/t Ag beginning at 315.00m; 49.50m @ 0.39% Sn and 33.62 g/t Ag beginning at 349.50m | | 09-16-25 | DSB-84 | Step-out | 225 | -85 | 410.30 | 16.50m @ 31.62g/t Ag beginning at 109.00m, incl. 3.00m @ 108.80 g/t Ag beginning at 109.00m | | 09-16-25 | DSB-85 | Step-out | 225 | -85 | 452.30 | 22.50m @ 38.26 g/t Ag beginning at 58.50m; 10.50m @ 68.36 g/t Ag beginning at 136.50m; 9.00m @ 198.08 g/t Ag beginning at 166.50m | | 09-16-25 | DSB-86 | Step-out | 225 | -60 | 515.60 | 241.00m @ 0.81% Zn and 0.80% Pb beginning at 102.70m, incl. 100.50m @ 1.56% Zn and 0.98% Pb beginning at 242.20m; 105.00m @ 0.85% Zn beginning at 344.20m | | 09-16-25 | DSB-87 | Infill | 225 | -85 | 416.50 | 241.50m @ 0.47% Sn and 23.17 g/t Ag incl. 213.00m @ 0.51% Sn and 25.46 g/t Ag beginning at 26.10m, incl. 34.50 m @ 1.18% Sn beginning at 62.10m | | 10-09-25 | DSB-88 | Step-out | 225 | -60 | 515.50 | 456.00m @1.72% Zn incl. 190.50m @ 2.35% Zn beginning at 56.20m | | 10-09-25 | DSB-89 | Step-out | 225 | -60 | 509.50 | 13.50m @ 74.64 g/t Ag, 0.81% Pb and 0.24% Sn beginning at 50.80m; 19.50m @ 41.52 g/t Ag, 0.88% Zn beginning at 74.80m; 33.00m @ 28.96 g/t Ag, 0.75% Pb and 2.26% Sn beginning at 103.30m | | 12-05-25 | DSB-90 | Infill | 235 | -85 | 514.00 | 51.00m @ 0.24% Sn beginning at 400.00m; 24.00m @ 0.57% Sn beginning at 91.00m; 16.50m @ 0.36% Sn beginning at 134.50m 13.50m @ 106.32 g/t Ag beginning at 256.00m | | 11-19-25 | DSB-91 | Infill | 225 | -85 | 514.00 | 64.50m @ 37.33 g/t Ag beginning at 19.50m; 151.50m @ 1.41% Zn, 0.63% Pb and 13.35 g/t Ag beginning at 109.50m incl. 31.50m @ 34.90 g/t Ag, 1.49% Zn and 0.35% Pb beginning at 147.00m | | 11-19-25 | DSB-92 | Step-out | 225 | -60 | 590.50 | 90.00m @ 61.05 g/t Ag and 0.20% Sn beginning at 492.30m incl. 15.00m @ 173.30 g/t Ag. 0.15% Sn and 1.59 g/t Au beginning at 517.80m; 49.00m @ 50.14 g/t Ag and 0.26% Sn beginning at 67.80m | | 12-05-25 | DSB-93 | Infill | 230 | -60 | 419.50 | 180.00m @ 165.00 g/t Ag, 0.74% Pb, 0.72% Zn and 0.16% Sn beginning at 112.20m, incl. 72.00m @ 295 g/t Ag and 0.44% Pb beginning at 131.70m; 28.50m @ 254.00 g/t Ag, 0.84 g/t Au, 1.10% Pb and 0.57% Sn beginning at 223.20m |

Qualified Person (“QP”)

Dr. Osvaldo Arce, P.Geo. Executive Vice President, Latin America for Eloro and General Manager of Eloro’s Bolivian subsidiary, Minera Tupiza S.R.L, and a Qualified Person (“QP”) as defined by National Instrument (“NI”) 43-101 has reviewed and approved the technical content of this news release. Dr. Arce who has more than 35 years of mineral exploration and extensive mining expertise across several countries in North and South America manages the overall technical program and supervises all field work conducted at Iska Iska.

Eloro utilized both ALS and AHK for drill core analyses, both of whom are major international accredited laboratories. Drill samples sent to ALS were prepared in both ALS Bolivia Ltda’s preparation facility in Oruro, Bolivia and the preparation facility operated by AHK in Tupiza with pulps sent to the main ALS Global laboratory in Lima for analysis. Drill core samples sent to AHK Laboratories are also prepared by AHK in Tupiza with pulps sent to the AHK laboratory in Lima, Peru.

Silver (Ag), zinc (Zn) and lead (Pb) are analyzed by Inductively Coupled Plasma Atomic Emission Spectroscopy (ICP-AES) using a four-acid digestion; Sn is analyzed by X-Ray Fluorescence (XRF) and Au is analyzed by fire assay on 50g pulps with an Atomic Absorption Spectroscopy (AAS) finish. AAS measures absorbed light to quantify elements, while ICP, such as ICP-OES or ICP-MS, measure emitted light or ions to determine elements. XRF uses fluorescent X-rays to excite atoms and to emit X-rays that reveal the presence and concentration of tin. Sample size in ICP typically ranges from 100 mg (0.1 g) to 1 g, for AAS, is usually less than 100 mg (0.1 g) and for XRF is ideally below 75 µm.

Check samples between ALS and AHK are regularly done as a QA/QC check. AHK is following the same analytical protocols used as with ALS and with the same QA/QC protocols except for Sn for which a sodium peroxide fusion is used at AHK following by ICP. Check comparisons of Sn results from ALS and ALS indicate no statistically significant difference between results using the two different analytical techniques.

Eloro employs an industry standard QA/QC program with standards, blanks and duplicates inserted into each batch of samples analyzed at both laboratories with selected check samples sent to a separate accredited laboratory. Check results are regularly monitored.

About Iska Iska

The Iska Iska silver-tin polymetallic project is a road accessible, royalty-free property, wholly controlled by the Title Holder, Empresa Minera Villegas S.R.L. and is located 48 km north of Tupiza city, in the Sud Chichas Province of the Department of Potosi in southern Bolivia. Eloro has an option to earn a 100% interest in Iska Iska.

Iska Iska is a major silver-tin polymetallic porphyry-epithermal complex associated with a Miocene collapsed/resurgent caldera, emplaced on Ordovician age rocks with major breccia pipes, dacitic domes and hydrothermal breccias. The caldera is 1.6km by 1.8km in dimension with a vertical extent of at least 1km. Mineralization age is similar to Cerro Rico de Potosí and other major deposits such as San Vicente, Chorolque, Tasna and Tatasi, all located along the same overall geological trend.

Eloro began underground diamond drilling from the Huayra Kasa underground workings at Iska Iska on September 13, 2020. On January 26, 2021, Eloro announced significant results from the first drilling at the Santa Barbara Breccia Pipe (SBBP) including the discovery hole DHK-15 which returned 29.53g Ag/t, 0.078g Au/t, 1.45%Zn, 0.59%Pb, 0.080%Cu and 0.056%Sn over 257.5m, from surface. Subsequent drilling has confirmed the presence of significant values of Ag-Sn polymetallic mineralization in the SBBP and the adjacent Central Breccia Pipe (CBP). A substantive mineralized envelope which is open along strike and down-dip extends around both major breccia pipes. Continuous channel sampling along the walls of the Santa Barbara Adit located to the east of SBBP returned average grades of 164.96 g Ag/t, 0.46%Sn, 3.46% Pb and 0.14% Cu over 166m including 446 g Ag/t, 9.03% Pb and 1.16% Sn over 56.19m. The west end of the adit intersects the end of the SBBP.

Since the initial discovery hole Eloro has released a number of significant drill results in the SBBP and the surrounding mineralized envelope which, along with geophysical data, has defined an extensive target zone. On October 17, 2023, Eloro filed the NI 43-101 Technical Report outlining the initial inferred MRE for Iska Iska, prepared by independent consultants Micon International Limited. The MRE was reported in two domains, the Polymetallic (Ag-Zn-Pb) Domain which is primarily in the east and south of the Santa Barbara deposit and the Tin (Sn-Ag-Pb) Domain which is primarily in the west and north.

The Polymetallic Domain is estimated to contain 560Mt of inferred mineral resources at 13.8 g Ag/t, 0.73% Zn & 0.28% Pb at an NSR cutoff of US$9.20 for potential open pit and an NSR cutoff of US$34.40 for potential underground. The majority of the mineral resource is contained in the constraining pit which has a stripping ratio of 1:1. The Polymetallic Domain contains a higher-grade inferred mineral resource at a NSR cutoff of $US25/t of 132 million tonnes at 1.11% Zn, 0.50% Pb and 24.3 g Ag/t which has a net NSR value of US$34.40/t which is 3.75 the estimated operating cost of US$9.20/t. The Tin Domain which is adjacent to the Polymetallic Domain and does not overlap, is estimated to contain an inferred mineral resource of 110Mt at 0.12% Sn, 14.2 g Ag/t and 0.14% Pb but is very under drilled.

Metallurgical tests reported on January 23, 2024 from a 6.3 tonne PQ drill core bulk sample representative of the higher grade Polymetallic (Ag-Zn-Pb) Domain returned a significantly higher average silver value of 91 g Ag/t compared to the weighted average grade of the original twinned holes at 31 g Ag/t strongly suggesting that the average silver grade is likely significantly underreported in the original twinned holes due to the much smaller sample size.

The Company reported on July 30, 2024, that updated modelling of the potential starter pit area at Santa Barbara zone highlights the importance of completing additional drilling to better define the grade and extent of the mineral resource in this area. Areas with higher-grade resource typically have much better drilling density but holes outside the core potential pit area are too widely spaced to give an accurate estimate of grade.

On September 4, 2024, the Company announced the restart of definition drilling in the potential starter pit area at Santa Barbara. It was highly focused on infill and step-out drill program in order to better define the full vertical and lateral extent of high-grade Sn and Ag mineralization, expanding higher-grade Sn mineralization to the west and the silver to the central and west parts. Also, to fill-in gaps that were formerly categorized as low-grade or internal waste in the mineral resource model and to drill in a closer-spacing 50m x 50m grid. Previous drilling has shown that areas with high-grade mineralization typically have much better drilling density, whereas holes outside the core area are too widely spaced to give an accurate grade estimate. This increased drilling density is particularly important for defining the extent of the high-grade Ag-bearing and Sn-bearing structures, and for categorizing the mineral resources from inferred to indicated, which have a major influence on overall grade and resources that will contribute to the PEA.