Effects of paleoweathering and supergene activity on volcanogenic massive sulfide (VMS) mineralization in the Penokean Volcanic Belt, northern Wisconsin, Michigan and east-central Minnesota, USA: Implications for future exploration

Although commonly small (≤2 million tonnes), such supergene-enriched deposits are generally shallow, allowing for development by low cost open pit methods and production of exceptionally high-grade, direct shipping copper and/or gold ores. As such, the buried PVB unconformity is considered a prime exploration target that is highly prospective for new discoveries of commercially viable, supergene-enriched VMS resources.