Abstract

CACERES-BOTTIA, Andrés; MANTILLA-FIGUEROA, Luis Carlos; RIOS-REYES, Carlos Alberto  and  PIMIENTO-RUEDA, Robinson. General considerations on the genesis of Uranium and Vanadium occurrence in the Cretaceous sedimentary rocks of the Berlin Synclinal, Central Cordillera (Colombian Andes). Bol. geol. [online]. 2023, vol.45, n.3, pp.79-93.  Epub Nov 16, 2023. ISSN 0120-0283.  https://doi.org/10.18273/revbol.v45n3-2023005.

The mineralization at the Berlin project in Colombia presents a huge interest based on its relatively high uranium and vanadium concentrations (0.11% U3O8) and (0.45% V2O5), with a suite of other economically interesting elements, all of them necessary to achieve the energy transition, including Y, Re, Ag, and P. The present research suggests a hypothesis for the U and V mineralization: an epigenetic origin. The results indicate that the source for U, V, and the other economic elements associated, were released from the black shales of the Abejorral Formation that is overlying a carbonate succession of Cretaceous wackestone. Those elements were transported in diagenetic fluids under specific physical and geochemical conditions. Efficient strata-bound trap occurred when the carbonate succession triggered a redox front that interacted not only with mineralized fluids, but organic matter and H2S.

Keywords : Uranium; Vanadium; Epigenetic; Energy transition.

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