Metallic Minerals Corp. announced an updated National Instrument 43-101 Mineral Resource Estimate representing a 25% increase in contained metal based on an additional 1,730 meters of diamond drilling completed at its La Plata project in 2022. Inferred mineral resources at the Allard deposit now total 1,211 million pounds of copper and 17.6 million ounces of silver in a constrained model with 147.3 million tonnes at an average grade of 0.41% Copper Equivalent (0.37% Cu and 3.72 g/t Ag) using a 0.25% CuEq cut-off grade.

The expansion from the inaugural resource to the current 1,317 Mlbs CuEq is largely driven by the major discovery in drill hole LAP22-04 (drilled in 2022), which intersected 816 meters of 0.41% CuEq recovered (0.30% Cu, 2.47 g/t Ag, 0.038 g/t Au, 0.055 g/t Pd and 0.093 g/t Pd) bottoming in 5.39% CuEq recovered over 5.2 m (2.44% Cu, 18.7 g/t Ag, 5.0 g/t Au+PGE). Follow-up drilling is currently underway to test the extent of this newly discovered high-grade mineralization, and at the time of this news release, the first offset drill hole was drilling in porphyry mineralization and had reached approximately 500 m depth. The Allard deposit resource remains completely open to expansion laterally and to depth.

Future mineral resource estimates will add gold, platinum and palladium to the copper and silver resource with additional drilling. These metals were not previously assayed for in historic drilling but add significant value to the recent drill intercepts. Furthermore, the greater La Plata copper-silver-gold-PGE project remains underexplored and open to new discoveries of both additional copper porphyry centers, as well as high-grade epithermal silver, gold and telluride mineralization that were the focus of historic mining in the district.

Inferred mineral resources at the Allard deposit now total 1,211 million pounds of copper and 17.6 million ounces of silver in a constrained model with 147.3 million tonnes at an average grade of 0.41% CuEq (0.37% Cu and 3.72 g/t Ag) using a 0.25% CuEq cut-off grade. Contained copper equivalent metal has increased by 25% to 1,317 million pounds and the overall grade of the deposit also increased 5% to 0.41% CuEq. Significant upside exists for both increases in equivalent grade and precious metal ounces due to limited historic assaying for gold, platinum and palladium.

These metals, which are found in high concentrations in the 2022 drilling but are not included in the current resource estimate, are anticipated to be added with additional drilling. The precious metals component of LAP22-04 (silver, gold, platinum, and palladium) can add 50% or more in equivalent value above the copper only values in that hole. The Allard resource remains open to expansion at depth and along strike with the discovery drill hole LAP22-04 being the easternmost hole drilled in the deposit.

Sixteen untested potential porphyry centers have been identified on the greater La Plata project area, as well as target areas with potential for significant high-grade epithermal silver, gold and telluride mineralization. Resource expansion drilling in 2022 totaled 1,780 m bringing the project total to 16,930 m in 59 drill holes. Metallic Minerals'La Plata project covers 44 square kilometers 20 km north of Mancos, Colorado, within the historic La Plata mining district, that is in the southwest portion of the prolific Colorado Mineral Belt.

The La Plata project is easily accessible by highways and improved gravel roads and is near significant power transmission lines. The La Plata district has a long and rich history of mining with the first silver deposits discovered in the 1700s by Spanish explorers. High-grade silver and gold production has been documented from the 1870s through the early 1940s from mineralized deposits at over 90 individual mines and prospects1.

From the 1950s to 1970s, major miners, including Rio Tinto (Bear Creek) and Freeport-McMoRan (Phelps Dodge), explored the district focusing on the significant potential for bulk-tonnage disseminated and stockwork hosted mineralization. Freeport-McMoRan retained ownership of claims in the district until 2002 when they sold their holdings to the current underlying vendors during the lows of the last metal price cycle. A total of 17,215 meters in 59 drill holes has been drilled on the property from the 1950s to present, this drilling has demonstrated the presence of a large multi-phase porphyry system with copper, silver, gold with more recent discoveries highlighting the potential for significant PGEs, rare earth minerals and tellurium.

This large-scale mineralized system is associated with a 10 km2 strongly magnetic signature with intense hydrothermal alteration. Surrounding the central porphyry system is an associated high-grade silver and gold-rich epithermal system measuring at least 8 km by 2 km that hosts 56 identified mineralized veins, replacement, and breccia structures. Historical production from some of these high-grade structures included bonanza grades for silver and gold.

Copper mineralization with associated silver, gold, platinum, and palladium is hosted by a large-scale, Late Mesozoic age, alkalic porphyry system with related silver, gold, telluride epithermal vein, breccia and replacement deposits hosted in adjacent sedimentary rocks. Porphyry copper systems are some of the largest sources of copper and precious metals production worldwide and are frequently cornerstone Tier 1 assets for the major mining companies. The sub-type of porphyry systems, known as alkalic porphyry deposits, commonly contain higher-grade precious metal content like at La Plata and can demonstrate significant scale.

The Allard deposit at La Plata is a significant potential source of copper and silver, both important industrial metals used for modern technologies broadly and particularly in renewable and clean energy applications. Recent and historical work has also demonstrated that the broader La Plata district is also a potential source of other critical minerals identified by the U.S. Government as requirements for economic and national security3. Drilling by Metallic Minerals in 2022 returned multi-gram intervals of platinum group elements with individual grades up to 5 g/t platinum and palladium, as well as critical minerals such as vanadium, and rare earth elements.

Tellurium, another element on the critical mineral list, was a by-product of historic high-grade gold and silver production in the district. The potential for these critical minerals to add additional economic value to the La Plata project will be evaluated as part of ongoing exploration efforts.