Calibre Mining Corp. is a Canadian exploration and development company focused on gold, silver, and copper projects in northeastern Nicaragua's Mining Triangle region. The company owns 100% of the Borosi gold, silver, and copper concessions covering over 785 square kilometers with a historical production of 7.9 million ounces of gold and 4 million ounces of silver. Calibre has outlined gold and silver resources at Cerro Aeropuerto, La Luna, Riscos de Oro, and an inferred gold, silver, and copper resource at Rosita. Current exploration programs include drilling at Primavera, Riscos de Oro, and a joint venture with Alder Resources at Rosita.