Johnson Camp Stage 1 Drilling Commences

PHOENIX, AZ - Excelsior Mining Corp. has commenced drilling at Johnson Camp with Nuton LLC, a Rio Tinto venture, to further evaluate the use of its Nuton copper heap leaching technologies at the Johnson Camp mine in Cochise County, Arizona. The program consists of drilling 6,000 feet of PQ core for the purposes of further metallurgical evaluation. Once completed the samples will be processed for mineralogy and tested using the Nuton process. Results are expected late Q3, 2023. The program is being funded by Nuton and carried out in connection with the previously announced Option Agreement.

"Excelsior is now aggressively moving the Johnson Camp mine forward with the next stages of the work program with Nuton. The sulfide potential at JCM is significant and we are pleased to be working with Nuton to realize that potential. In parallel we continue to progress Gunnison towards well stimulation trials later this year," said Robert Winton, Senior Vice President & General Manager of Operations.