Laramie Mountains

The Silver Crown district, located on the east flank of the Laramie Mountains in southeast Wyoming, was organized in 1879. A mill and smelter operated on a small scale in the district from 1880 to 1900. Structurally controlled copper-gold mineralization parallels regional foliation or occurs in tensional fractures. In the northern part of the district, narrow clay-filled shear zone cataclastics and mylonites host massive, white, copper-bearing quartz veins, and lenses. These are generally excessively narrow with limited tonnage. The southern part of the district hosts low-grade, large-tonnage disseminated copper-gold within granodiorite and quartz monzonite.


Patty Webber,