GoldMining has commenced an exploration drilling programme at its wholly owned Yarumalito Gold-Copper Project in Colombia’s Antioquia region.

The Yarumalito site is situated in the Mid Cauca gold-copper belt, approximately 105km south-southwest of Medellín and about 40km south of the company’s La Mina project.

A core drilling programme, which has been fully funded, is currently in progress with around 1,200m of diamond drilling planned.

The objective is to build on previous geological work by targeting areas identified through recent analysis of historical core samples.

The drilling will focus on sections of the P-1 porphyry unit that have received less exploration, as this area is believed to hold significant gold-copper mineralisation.

Previous drilling at the site has returned intervals such as 257m grading 0.50 grams per tonne (g/t) gold and 0.1% copper from the surface in hole YAR-06.

Additional results include 250m at 0.51 g/t gold and 0.13% copper in YAR-08, as well as 141.4m at 0.77 g/t gold and 0.09% copper from surface in YAR-11.

GoldMining president and CEO Alastair Still said: “Yarumalito sits in the heart of Colombia's prolific Mid Cauca belt, in close proximity to major discoveries like Collective Mining's Guayabales project and Aris Mining's Marmato mine.

“With diamond core drilling now underway on our second active exploration drilling programme in the Americas for 2026, we are testing a newly refined geological model at Yarumalito.

“This large, highly accessible gold-copper porphyry system remains open in all directions and the targeted drill programme is our first step in seeking to unlock the substantial step-out growth potential of the mineralised P-1 host unit.”

At Yarumalito, gold and copper mineralisation is associated with porphyry intrusive bodies made up of potassic-altered diorite containing both disseminated and fracture-controlled pyrite, chalcopyrite, and magnetite.

These rock units are intersected by intermediate sulphidation epithermal veins, which host minerals including pyrite, galena, sphalerite, and chalcopyrite.

In March this year, GoldMining launched a drilling programme centred on exploration at its wholly owned São Jorge Project situated in Brazil’s Tapajós gold district.