BRIEF-Prism Resources says deal to sell certain Ontario properties to AuRico Metals terminated BY Reuters — 11:28 AM ET 07/21/2017 July 21 (Reuters) - Prism Resources Inc: * Prism Resources Inc. agreement in respect of the sale of a 7.5% net profits interest not proceeding * Co, AuRico received a written communication from Detour claiming royalty is " invalid and unenforceable against Detour" * Its agreement with AuRico to sell to AuRico its 7.5% net profit interest in Aurora and Sunday Lake Properties has been terminated