"If you're talking about a $40 to $50 an ounce impact … it may mean the difference between Tropicana getting up and Tropicana not getting up," he said, referring to AngloGold's joint venture in Western Australia with Independence Group. AngloGold is reworking the feasibility of the Tropicana project in the hope of raising its proposed annual production closer to 400,000 ounces a year from 300,000 ounces. The remoteness of the project, about 250 kilometres east of Kalgoorlie, has prompted the group to examine several options for power, including gas, liquefied natural gas and solar baseload power.