Canadian Zinc and Parks Canada sign renewed memorandum of understanding

OTTAWA, ONTARIO--(Marketwire - March 5, 2012) - Canadian Zinc Corporation (TSX:CZN)(OTCBB:CZICF) (the "Company" or "Canadian Zinc") and Parks Canada are pleased to announce a renewed Memorandum of Understanding ("MOU") regarding the operation and development of the Prairie Creek Mine and...