In his statement, Stauber says his bill would reinstate mineral leases in the area, describing that Biden's decision to ...

U.S. Rep. Betty McCollum (D-Minn.) reintroduced a bill on Jan. 21 to ban sulfide-ore copper mining in the Boundary Waters ...

The safe disposal of copper slag-- the process of converting copper sulphide ores into refined copper, through crushing, ...

The permits could have allowed Antofagasta’s Twin Metals Minnesota to significantly expand its proposed sulfide-ore copper mine at the edge of the Boundary Waters Canoe Area Wilderness in northeastern ...

The Johan Dahl land area in the South Greenland Copper Belt covers 666.5 square kilometers. Amaroq stated that the region holds significant copper potential. Through the Gardaq joint venture, the ...

On January 24, 2025, the SMM Imported Copper Concentrate Index (weekly) stood at -$2.2/mt, marking the second time since May 2024 that the TC value turned negative. Unlike previous instances of brief ...

This region is defined by its lakes, rivers, streams and high-quality wetlands. Mining for copper, nickel and other heavy metals is often referred to as “sulfide mining,” because these metals are ...

Zinc sulfide concentrate leaching processes are essential for extracting zinc from its ores, particularly in the ... and enhanced extraction of zinc, copper, and indium from the concentrate ...