TORONTO, ONTARIO — (Marketwire) — 11/29/12 — Canadian mining companies should be investing now to ensure they can fulfill future global demand for commodities even as they face a series of immediate challenges affecting the global mining sector, according to a new report from Deloitte that was released today. The report, Tracking the trends 2013, provides commentary and analysis of the top 10 issues most likely to impact the mining sector in 2013 and provides a range of responses that compa