IGO has been undertaking a strategic review in an attempt to revaluate its resources.
The American Exploration & Mining Association was joined by a coalition in filing a challenge last Friday in the Wyoming district court.
The world's largest producer of iron ore shipped 80.3 million tons of the steel-making commodity in the quarter.
The company's Flat gold project is located 40 km north of the giant Donlin gold project.
Comments
Janice
Andrea Sutton with Energy Resources of Australia is in uranium mining, not coal mining.