These examples are focused on Cu isotope fractionation as a means to identify concealed mineral deposits.
Copper isotope values used in surface waters from the Pebble deposit in Alaska to search for active weathering of copper sulfide (Mathur et al. 2013, 2014)
Copper isotope pattern seen in copper minerals near Bingham, Utah, shows that Cu isotope values could provide clues using drill core sulfide to vector to source of ores (Dendas et al. , 2010)
Copper isotope values from chalcocite and Fe-oxides, from Silverbell, Arizona, related to grades. Most likely indicates the degree of weathering in a deposit. Mathur et al. 2011.