The dispute between the government and Vedanta started when Zambia appointed a liquidator to run Konkola Copper Mines and accused it of breaching its licence.
Nearly 25 asset management firms and some pension funds are seeking compensation for losses derived from Vale's plummeting share price since the disaster.
San Marco Resources optioned the Buck property, considered to be part of the Telkwa Formation of the lower Jurassic Hazelton Group in British Columbia.