"Mineralogy and Geochemistry of the Heddleston Porphyry Cu ...
· The Heddleston porphyry CuMo deposit is loed in and Clark County, Montana, near the headwaters of the Blackfoot River. It is immediately west of the historic Mike Horse mine, an important producer of PbZn from polymetallic veins and lodes. The Heddleston property was explored extensively by the Anaconda Company in the 1960s and 1970s, but was never mined.