Stratabound Uranium Deposits in the Argentinian Andes

Hydrocarbons and other fluids: paragenesis, interactions and exploration potential inferred from petrographic studies

“…Microprobe studies show that the metalliferous minerals are paragenetically late, and have often precipitated within the intergranular bitumens of reservoirs, nucleated on grainbitumen interfaces (Fig. 6, from the Heumul uranium deposit, Argentina, where uranium from volcanics precipitated in Cretaceous hosted oil reservoirs; Ferreyra & Lardone 1990). In these cases, metalliferous fluids clearly were able to penetrate into the oil in the reservoir.…”