VANCOUVER , March 4 / PRNewswire-FirstCall / - ( All figures in US dollars except where noted ) - Northgate Minerals Corporation ( TSX : NGX ; NYSE ALTERNEXT / AMEX : NXG ) today reported net earnings of $ 18,668,000 or $ 0.07 per diluted common share and cash flow from operations of $ 5,858,000 or $ 0.02 per diluted common share for the fourth quarter of 2008 .