Tesoro Gold Ltd. operates as a cooper and gold mining company. It engages in the acquisition, exploration, and development of mining projects in region of Chile. It operates through the Exploration and Evaluation, and Corporate segments. The Exploration and Evaluation segment consists of acquisition cost of exploration licenses and all expenses related to the licenses in Chile. The Corporate segment is involved in cash and cash equivalents and investments in financial assets. The company was founded by Zeffron Reeves and Geoff Mcnamara on October 29, 2003 and is headquartered in Perth, Australia.