Altan Rio Minerals Limited is a mineral exploration and development company engaged in the acquisition, exploration and development of exploration and evaluation assets in Mongolia. The Company operates through the exploration of exploration and evaluation assets segment. The Company explores for gold and copper projects in various mineral regions in Mongolia. It is involved in exploring holdings totaling over 255,148 acres. The Chandman-Yol property is located in mountainous basin and range country in eastern Khovd Aimag, western Mongolia, over 1,050 kilometers west of the capital Ulaanbaatar, and consists of approximately nine tenements covering over 203,880 acres. The Khavchuu Project is an early-stage exploration project located approximately 10 kilometers west of Centerra Gold Inc.'s Boroo mine and mill complex in the Boroogol District of orogenic gold deposits, northern Mongolia. The Onon project consists of over three tenements covering approximately 33,680 acres.