Calibre Mining Corp., an exploration stage company, together with its subsidiaries, engages in the acquisition, exploration, and development of precious and base metals assets and mineral properties in Nicaragua. The company explores for gold, silver, copper, zinc, and iron deposits. It holds a 100% interest in the Borosi Gold-Silver-Copper Project located in the North Atlantic Autonomous Region of Nicaragua, Central America; and 100% interest in mineral concessions covering an area of 518 square kilometers in the mining triangle of northeast Nicaragua, including the Primavera Gold-Copper Porphyry Project, Siuna Gold Project, and Santa Maria Gold-Silver Project. The company also holds 51% interest in the Siuna Gold-Silver-Copper Property covering area of 253 square kilometers located in the Northeastern Nicaragua. In addition, it holds interest in the El Limon and La Libertad gold mines, the Pavon gold project, and other mineral concessions in Nicaragua. The company was formerly known as TLC Ventures Corp. and changed its name to Calibre Mining Corp. in June 2007. Calibre Mining Corp. was incorporated in 1969 and is headquartered in Vancouver, Canada.