Luca Intersects 9.9 Metres of 5.39 g/t Gold Equivalent from the Catorce Zone at Tahuehueto Mine

Canada NewsWire

VANCOUVER, BC , Sept. 8, 2026 /CNW/ -- Luca Mining Corp. ("Luca" or the "Company") (TSXV: LUCA) (OTCQX: LUCMF) (Frankfurt: Z68) reports new assay results from its ongoing 2026 exploration drill program at the Tahuehueto gold-silver mine in Durango, Mexico.

The latest results continue to demonstrate the potential for significant near-mine resource expansion at Tahuehueto, with high-grade mineralization intersected across the Creston, Perdido veins and specifically at the Catorce Zone, an under-drilled area interpreted to represent a southern extension of the Creston Vein system. At Catorce, drilling has resumed for the first time since 2008, with the first surface hole returning 9.9 metres of 5.39 g/t AuEq , including 1.0 metre of 27.56 g/t AuEq , highlighting the potential of this underexplored vein system.

Highlights

High-grade results from the first surface drillhole at the Catorce Zone since 2008: 9.9 metres ("m") of 5.39 g/t AuEq** ( 3.63 g/t Au, 70.14 g/t Ag, 0.02% Cu, 1.69% Pb, 5.63% Zn) in hole DDH26-RCE-01 including 1.0 m of 27.56 g/t AuEq ( 21.10 g/t Au, 58.50 g/t Ag, 0.09% Cu, 3.93% Pb, 38.25% Zn ) The Catorce Zone is located approximately 250 m from existing underground development and is interpreted to be a southern extension of the Creston Vein within an area of structural complexity (Figure 1). This area was targeted by Luca with 7 holes totalling ~1,500 m of diamond drilling in this new exploration campaign.

Continued high-grade intercepts from the Creston Vein, including: 6.2 m of 6.37 g/t AuEq ( 3.68 g/t Au, 153.91 g/t Ag, 0.91% Cu, 1.17% Pb and 1.15% Zn ) in hole DDH26-248 including 1.1 m of 20.60 g/t AuEq ( 12.00 g/t Au, 563.00 g/t Ag, 2.51% Cu, 3.51% Pb, 0.86% Zn ) within a broader interval of 2.9 m of 11.83 g/t AuEq ( 7.29 g/t Au, 281.12 g/t Ag, 1.46% Cu, 1.70% Pb, 1.06% Zn )

3.4 m of 4.77 g/t AuEq ( 2.00 g/t Au