BUZZ-Canada's Sabina set for worst day in 13 yrs on mine license woes
** Sabina Gold and Silver's shares slump 33.5 pct to C$1.16 after Nunavut Impact Review Board asks miner to stall its Back River Gold Project
** Canadian company's shares are on track for their worst day since 2013 in heavy trade
** NIRB recommends project not be given a license now, but can be reconsidered after company clarifies uncertainties, mainly with regard to caribou and climate change
** About 4.5 mln shares traded, their busiest day in two months
** Up to Wednesday's close, company's shares had more than quadrupled in value over the last 12 months
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