Canadian firm Argonaut Gold, a subsidiary of Argonaut Gold Ltd., is engaged in the exploration, development, and production of gold in Mexico and Canada. On December 30, 2009, Argonaut acquired Castle Gold, whose assets include the El Castillo gold mine and La Fortuna gold-silver-copper project, both in Mexico's Durango state. In January 2011, the company acquired Pediment Gold and with it the latter's primary asset, the San Antonio yellow metal project in Mexico's Baja California Sur state. Also included in the deal La Colorada gold-silver mine in Sonora state. Later, in 2013, the company purchased the San Agustín gold-silver-zinc project through its Mexican subsidiary, Minera Real del Oro, an initiative under development in Durango state. In Canada, it owns the Magino gold project in Ontario province. Argonaut Gold was founded in 2009 and is based in Reno, Nevada.