Calibre Mining Corp. engages in the acquisition, advancement and development of precious and base metals assets and mineral properties presently in Nicaragua. The Company is focused on the exploration in a prospective, but underexplored region of the historic Mining Triangle in northeast Nicaragua, named the Borosi Concessions located approximately 275 kilometers northeast of the capital city of Managua and 80 kilometers west of the coastal town of Puerto Cabezas. The area is prospective for gold, silver and copper mineralization. It has an option to acquire 70% interest in the Eastern Borosi Project consisting of approximately 176 square kilometers within the Borosi Concessions, Northeast Nicaragua; a 70% total in the Primavera gold-copper project, a 65% interest in approximately 33 square kilometers Rosita D concession. It has 100% ownership in approximately 253 square kilometers Siuna District, which hosts a range of Au-skarn, porphyry and epithermal vein targets.