Quartz- vein gold deposits apparently have been restricted to specific intervals in the Earth’s history, including the Late Archean, Early Proterozoic, early Paleozoic and Early Mesozoic periods. They are best developed in Archean Greenstone belts within Archean cratonic areas, such as in northern regions of Ontario –
Quartz is a chemical compound consisting of one part silicon and two parts oxygen. It is silicon dioxide (SiO2). It is the most abundant mineral found at Earth’s surface and its unique properties make it one of the most useful natural substances.