Work is underway in New Zealand to determine economically viable deposits, and technologies for safe extraction.

The challenge is to find those areas where the concentrations are adequate to form an economically viable deposit.

The peninsula is commonly described as "oil-rich", though in fact no commercially viable deposits of oil have been discovered.

Commercially viable deposits of lignite were confined to the area around Lough Neagh in the early 1980s.

Although the Colombian military dislodged the protesters from the site, no commercially viable deposits were found.

Furthermore, it also demonstrates that low-grade concentrations of gold (1-2 g/t Au) can be mined as economically viable deposits.

There are a number of hydroelectric plants on the river, as well as large and viable deposits of Uranium ore in the district.

Alabama's abundant natural mineral resources include commercially viable deposits of coal, oil, natural gas, and various minerals such as limestone and marble.

Sometime before 1894, enterprising petroleum prospectors recognized the likelihood that economically viable deposits of oil and gas were the source for these seeps, and began digging.

There are no other currently commercially viable deposits of this type.