Lac minerals ltd. v. international corona resources ltd. International corona resources ltd. , a junior mining company, carried out an extensive exploration program and made arrangements to attempt to acquire the williams property. Representatives from a senior mining company, lac minerals, read of the test results in a public newsletter and arranged to visit the corona property. Corona showed the lac representatives confidential geological findings and disclosed the geological theory of the site and the importance of the williams property. Detailed private information was left with lac officials during further discussions about development and financing options. Corona was advised by lac to aggressively pursue the williams property. The lac representatives, after their visit to corona"s site, instructed their personnel to gather information on the area in question and to stake favorable claims east of the. Lac acquired the williams property but never informed corona at any time of its intention of acquiring that property.