Figure 1 Mithril’s Copalquin and La Dura property locations in Durango State, Mexico
Mithril acquired the La Dura Property in December 2025. Highlights:
- The La Dura property consists of 5 contiguous mining concessions for a total area of 2,052 hectares, located less than 5 km from the town of El Durazno and less than 20 km from the Company’s flagship Copalquin District property.
- The La Dura property hosts several historic mines and workings with the most notable being the 4 level La Dura gold-silver mine with a 60 tonne per day processing facility.
- The property has a large historic database of mining records and data from various sampling campaigns from 1990’s to 2018. The mine last operated in 2013.
- The LiDAR survey is scheduled to be flown over the property this month followed by the aerial magnetic survey in early 2026.
- The acquisition of the La Dura property expands our land holding close to our flagship Copalquin District property, where drilling is progressing at Targets 1 and 5, with Target 3 drilling scheduled to commence in January 2026. The first half of 2026 will be a pivotal period in the rapid advancement of the Copalquin District as we progress target expansion drilling and continue our geologic development of the feeder system responsible for the widespread gold and silver mineralisation across this large district.
About the La Dura Project
La Dura consists of 5 contiguous mining concessions with a total area of 2,052 hectares and located in Durango State, Mexico, 5 km from the town of El Durazno and 20 km from Mithril’s flagship Copalquin property.
The property hosts a significant Au‐Ag sheeted to stockwork vein system associated with NW striking faults in Tertiary rhyolite. Mineralization occurs on surface along 650 metres of strike and has been mined in the San Manuel shoot at the La Dura historic mine, to about 140 metres depth. Veins are characterised by low sulphide mineralisation with minimal to no alteration of the host rhyolite tuff. Historically, the veins have been exploited and explored solely on the progress of the underground workings and assaying. The project warrants property scale mapping, wide spaced soil sampling and channel sampling to develop targets for drill testing. LiDAR and aerial magnetic surveys are planned as precursors to a field programme.
The veins at the various workings appear to be hosted by Upper Series volcanic rocks and may have significant depth potential should they extend into the lower series andesitic rocks at some greater depth.
Figure 2 The upper level of the La Dura mine historic workings at the La Dura property