Core Silver Intersects High-Grade Copper-Molybdenum Veins up to 7.31% Cu & 1.01% Mo Confirming Large Porphyry System at Laverdiere

VANCOUVER, BC / ACCESS Newswire / March 16, 2026 / Core Silver Corp. ("Core Silver" or the "Company") (CSE:CC)(FSE:8ZR)(OTCQB:CCOOF) is pleased to report assay results from the 2025 drilling campaign at the Blue Property (the "Property") located in the Atlin Mining District, northwestern British Columbia.

Core Silver's 2025 exploration campaign confirmed the presence of a laterally and vertically extensive copper (Cu)-molybdenum (Mo)-silver (Ag)-gold (Au) porphyry system at the Laverdiere Copper Project. Exploratory drilling at Laverdiere intersected a molybdenum shell containing widespread, low-density porphyry veining with significant grades locally exceeding 1.0% Mo (1.68% MoS₂) and 7% Cu (Table 1). The area drilled along the Valley Fault in 2025 is considered directly marginal to one of three interpreted high-grade porphyry centres outlined by systematic soil sampling completed in 2025.

2025 DIAMOND DRILLING HIGHLIGHTS AT THE LAVERDIERE COPPER PROJECT

• Drilling in 2025 intersected mineralized porphyritic rocks with moderate-to-intense alteration and veining along the Valley Fault (Figure 1), situated approximately 2-kilometres southwest of the Main Copper Skarn Zone that was drill tested in 2022. Here LAV22-001, the first-ever drill hole completed by the Company, returned 48.50m of 0.90% Cu, 6g/t Ag and 0.11g/t Au from 31.46m depth, within 96.00m of 0.47% Cu from surface.

• In 2025, hole LAV25-010 was drilled northeast across the Valley Fault and intersected widespread, anomalous zones of molybdenum and copper with more localized, moderate-to-high-grade porphyry copper ± gold veins, including:

  • 10.50m of 0.11% Cu, 2.3g/t Ag and 0.025g/t Au from 444.75m depth, including 2.25m of 0.44% Cu, 10.3g/t Ag and 0.076g/t Au, and 0.50m of 1.97% Cu, 45.9g/t Ag and 0.32g/t Au.

  • 10.70m of 0.12% Cu, 1.0g/t Ag and 0.01% Mo from 31.20m depth, including 5.90m of 0.21% Cu, 1.7g/t Ag and 0.02% Mo (0.04% MoS₂) and 0.50m of 2.04% Cu, 13.4g/t Ag, 0.032g/t Au and 0.25% Mo (0.41% MoS₂).

  • 21.00m of 0.02% Mo (0.04% MoS₂) from 588.00m depth, including 2.00m of 0.19% Cu, 1.6g/t Ag, 0.017g/t Au and 0.05% Mo (0.09% MoS₂) and 1.00m of 0.27% Cu, 2.4g/t Ag, 0.022g/t Au and 0.08% Mo (0.14% MoS₂).

  • Additional porphyry veins sampled over intervals ranging between 0.30m and 1.15m width returned up to 0.29% Mo (0.49% MoS₂) with 3.3g/t Ag, and up to 0.51% Cu in potassic zones intersected below 550m drilled depth (Table 1).

• Intermittent, well-developed copper-molybdenum-gold-silver-bearing porphyry veins measuring up to 35 cm thick were observed within higher-grade molybdenum zones at depth in hole LAV25-011, including:

  • 24.80m of 0.17% Cu, 1.2g/t Ag and 0.03% Mo (0.05% MoS₂) from 580.55m depth, including: 18.35m of 0.23% Cu, 1.6g/t Ag, 0.010g/t Au and 0.04% Mo (0.07% MoS₂) from 587.00m, 2.15m of 1.51% Cu, 11.3g/t Ag, 0.064g/t Au and 0.26% Mo (0.44% MoS₂) from 603.20m depth, including 0.95m of 3.17% Cu, 19.9g/t Ag, 0.058g/t Au and 0.38% Mo (0.63% MoS₂) and 0.35m of 7.31% Cu, 1.01% Mo (1.68% MoS₂), 46.3g/t Ag and 0.14g/t Au from 603.80m depth.

  • Additional veining within this interval graded up to 0.52% Cu with 2.1g/t Ag, 0.012g/t Au and 0.09% Mo (0.16% MoS₂) over 1.00m and 0.60m of 0.39% Cu, 8.8g/t Ag, 0.14g/t Au and 0.33% Mo (0.56% MoS₂).

  • Shallower intercepts from LAV25-011 include: 2.00m of 0.29% Cu, 1.6g/t Ag, 0.012g/t Au and 0.01% Mo from 12.50m depth with vein sets sampled over 1.00m intervals returning up to 0.16% Cu and 0.15% Mo (0.25% MoS₂).

• Hole LAV25-012 intersected impressive, narrow zones of high-grade molybdenum veins and vein breccia with anomalous copper-bearing porphyry veins beginning at drilled depths below 300 metres, including:

  • 109.15m of 0.02% Mo (0.03% MoS₂) from 520.85m depth, including: 60.05m of 0.03% Mo (0.05% MoS₂), 33.50m of 0.04% Mo (0.07% MoS₂) from 541.00m depth which includes 5.25m of 0.14% Mo (0.23% MoS₂); and 10.40m of 0.06% Mo (0.09% MoS₂) from 570.50m depth which includes 4.00m of 0.11% Mo (0.19% MoS₂).

  • Additional intervals and individual veins sampled within the above section returned up to 0.32% Mo (0.53% MoS₂) with 940ppm Cu over 1.70m, 2.00m of 0.11% Mo (0.18% MoS₂) and 0.75m of 0.29% Mo (0.48% MoS₂) and 953ppm Cu.

  • Deeper vein sets near end of hole returned up to 0.56% Mo (0.94% MoS₂) over 0.70m from 789.80m depth, and 0.50m of 0.67% Cu with 2.4g/t Ag from 827.00m depth.

• Hole LAV25-013 intersected intense, widespread alteration, deep impressive molybdenum mineralization and localized elevated copper grades in deeper potassic zones and returned:

  • 22.00m of 0.02% Mo (0.03% MoS₂) from 398.00m depth including 10.00m of 0.04% Mo (0.06% MoS₂) including 3.00m of 0.12% Mo (0.19% MoS₂) with 320ppm Cu and 1.2g/t Ag, and 1.00m of 0.34% Mo (0.56% MoS₂) with 660ppm Cu.

  • Intermittent potassic zones intersected at depth carrying increased copper and molybdenum grades returned up to 0.28% Cu over 0.50m from 994.50m depth, 0.50m of 0.52% Cu with 0.32% Mo (0.54% MoS₂) and 1.8g/t Ag from 729.50m depth, 0.39% Cu with 0.21% Mo (0.34% MoS₂), 2.1g/t Ag and 0.014g/t Au over 0.50m from 682.25m depth and 1.00m of 0.20% Mo (0.34% MoS₂) with 590ppm Cu from 1045.40m depth.

• Zones of distal potassic alteration with elevated copper grades were intersected below 400m drilled depth along the Valley Fault in 2025 and are locally bound by late-to-post mineral diorite-porphyry phases.

• Three (3) zones containing anomalous copper and molybdenum values measuring between 900 and 1750-metres-wide were delineated through soil sampling in 2025. These zones (Anomalies X, Y, Z; Figure 3) reside within a ~4-kilometre-long mineralized corridor and are interpreted to represent potential clustered porphyry (+skarn) centres exposed at different erosional levels (Figure 3).

• The Laverdiere System shares numerous characteristics with some of the largest and most profitable porphyry deposits globally (e.g. Chuquicamata, Escondida, Bingham Canyon). Geochemically, the Laverdiere porphyry falls within the ‘Chuqui Fertility Window' indicating that the system is highly prospective for porphyry copper-gold mineralization with additional evidence supporting magma recharge - an important event that sustains long-lived mineralizing systems by introducing additional copper, gold and sulfur and increasing overall metal endowment of the system (Figure 4).

• Results from near surface molybdenum veins and breccias encountered in 2025 fall within the range of typical economic cut-off grades for porphyry deposits. At drilled depths greater than 400 metres, increases in copper and molybdenum grades in areas of low-density porphyry veining match those of high-grade primary molybdenum and/or copper porphyry deposits. This indicates that significant stacked grades are likely in zones of higher vein density.

• Several coincident geochemical, structural, and geophysical vectors support the existence of a district-scale copper-molybdenum-silver-gold porphyry-skarn system that remains open and largely untested. Currently, porphyry mineralization at the Laverdiere Project has been delineated for 5.2-kilometres laterally and to drilled depths exceeding 800 metres.

• In total, seven (7) diamond drillholes totalling 3,857.17 metres were completed across five locations at the Laverdiere Copper Project in 2025.

"Results from our 2025 drilling campaign continue to demonstrate the scale and fertility of the Laverdiere Porphyry System," said Nick Rodway, CEO of Core Silver Corp. "The presence of widespread copper-molybdenum mineralization and high-grade porphyry veins across multiple holes confirms that we are exploring a large and robust porphyry system. With mineralization now defined over more than five kilometres of strike and remaining open at depth and along trend, we believe Laverdiere has the potential to develop into a significant new copper discovery within an underexplored ore-deposit gap in northwestern British Columbia."