shares in greatland gold plc fell tuesday after the company published a prefeasibility study for the southeast crescent zone of its havieron goldcopper deposit in australia the area has been estimated an initial probable ore reserve estimate of 14 million metric tons containing 16 million ounces of gold and 73000 tons of copper greatland which is developing havieron through a joint venture with newcrest mining ltd said the study should be viewed as the first stage as it only covers a small fraction of the resource shares at 0749 gmt were down 10 at 1875 pence