Temporary suspensions come as government measures to contain the the spread of Covid-19 has disrupted fuel supplies.

Cielo Waste Solutions and Renewable U Halifax say they need a supplier to kick off high-grade renewable fuel production project.

Temporarily placing operations into care and maintenance over Covid- 19 concerns could see some production deferred into 2021.

Researchers working with drill cores samples provided by the miner identified a mineral signature that matched other portions of the North Atlantic craton.

Producers have halted or cut back operations and slowed construction.

New Gold's Rainy River mine is located about 65 kilometres north of Fort Frances, Ontario, which straddles the US border.