Gold with Quartz

specimen number:
2062324

location:
Michigan Gold Mine, Marquette Co., Michigan, USA

description:
Bright crystalline native gold on quartz. Neat locality example for the species.

The Michigan gold mine, located near Ishpeming in Marquette County, Michigan, was the most prominent underground operation within the brief Marquette County gold rush. Geologically, the deposit is situated within the Archean-aged Ishpeming Greenstone Belt, where hydrothermal fluids deposited native gold along with quartz, pyrite, tourmaline, and galena within northwest-trending shear zones cutting across diorite and greenstone formations. Discovery of gold at the site occurred in 1880, and formal mining operations began around 1885 under the Michigan Gold Mining Company, which constructed a stamp mill to process the high-grade quartz veins. The mine produced a significant amount of gold before erratic ore distribution, high operational costs, and corporate financial challenges led to a complete shutdown of regular mining activity around 1897. Multiple secondary attempts were made to re-evaluate and unwater the underground shafts during the early twentieth century, but no sustained commercial extraction was achieved after the initial operations ceased.

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