Hydrocarbons probably played a role in formation of framboidal pyrite cores to goldmineralized arsenian rims and in efficient transport and/or deposition of gold. The PostBetze deposit is arguably a supergiant because of the additional, but still mainly stratabound, gold resources developed in strain heterogeneities adjacent to the pre
The oil droplets in the hydrothermal fluids initiated the efficient chemical precipitation of native gold and the formation of very complexstructured gold and uranium ore. Using highresolution imaging techniques, the researchers were able to visualize a to date unknown oreforming process, in which migrating oil plays the dominant role in
Each episode was estimated to take between 3.5 and 11.7 years a total of under 18 to almost 60 years to form the secondary gold. Understanding this gold biogeochemical cycle could help mineral exploration by finding undiscovered gold deposits or developing innovative processing techniques, says Dr Shuster, University of Adelaide.
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