Dwarves' Earth Treasures Online Museum: Datolites from Star Mine
Star Mine, Copper Harbor, Keweenaw
CO., Michigan
.
Like Clark and other nearby mines, Star Mine did not
produce sufficient copper supply to continue mining so it came short-lived
and shut down in 1860s. What remained of the Star Mine are Office and Powder
houses that are getting overgrown with trees and plant that I almost missed
them while exploring around looking for the mine piles of Star Mine. It
had been reported that they penetrated a greenish "mudrock" enriched in
datolites when they sunk the shafts there. But now, not much has been found
until the local club bulldozed one mine pile recently (2010) and few Star
datolites showed up. The datolites are mostly white with opaque green hues
and few had been found with red, and green to turquoise colorings.
