Calibre Mining Corp., together with its subsidiaries, engages in the acquisition, exploration, and development of gold properties in Nicaragua. The company primarily explores for gold, silver, and copper deposits. It holds 100% interests in the El Limon and La Libertad gold mines, the Pavon gold project, and other mineral concessions in Nicaragua; and the Borosi Gold-Silver-Copper project located in the North Atlantic Autonomous Region of Nicaragua, Central America The company was formerly known as TLC Ventures Corp. and changed its name to Calibre Mining Corp. in June 2007. Calibre Mining Corp. was founded in 1969 and is headquartered in Vancouver, Canada.