Relation Between Goethite And Gold

Some authors (e.G.Neiva and neiva, 1990), suggested a genetic relation between hydrothermal-fluid activity and late-stage fractional crystallization of granites for the portuguese gold deposits.In contrast, noronha et al.Concluded that the gold ores in quartz veins appear to be the result of three successive periods of fluid circulation in response to high heat flow and the intrusions of the.