Cabinet has made its decisions on the proposal to open up more conservation land to mining but the details won't be released until Tuesday.
On Monday, ministers considered whether to remove protection from about 7000 hectares of Schedule Four land, including parts of Great Barrier Island, Coromandel and Paparoa National Park.
Prime Minister John Key says the decisions will be run by the National caucus on Tuesday before an announcement is made by Energy Minister Gerry Brownlee.
At his weekly news conference on Monday Mr Key would not answer questions on whether the proposal has been scaled back. He did say, however, that there will be economic benefits for New Zealand.
Radio New Zealand's political staff say there are indications that the Government has scaled back its original mining ambitions.
