Report of Investigation 133

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RI-133 Elevated Critical Mineral Concentrations Associated with the Paleocene.Eocene Thermal Maximum, Golden Valley Formation, North Dakota report cover

 

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ND Critical Minerals Press Release

 

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Brightly colored butte surrounded by dark storm clouds.

Publication Cover Photo - Coals in the lower half of the bright beds at the base of this butte in Dunn County are enriched in critical minerals.

Grassy hills with bright white and orange colors of the exposed geological formation.

Critical minerals are typically enriched in the lower part of the bright bed and the underlying coals of the Bear Den Member of the Golden Valley Fm, western ND.

Two Geological Survey geologists using a drill to collect coal samples on the side of a hill.

Geological Survey geologists collecting coal samples for the critical minerals study in Slope Co., ND in 2018.

A stratigraphic profile of rare earth element concentrations for the 122 rock samples for the NDGS critical mineral study. The rock colors are reflected in the profile.

A stratigraphic profile of rare earth element concentrations for the 122 rock samples for the NDGS critical mineral study. The rock colors are reflected in the profile.

Map of the Golden Vallely Formation and sampling sites

Map of the Golden Valley Formation and sampling sites.