2022
DOI: 10.1590/2317-4889202220210088
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Microbialitic deposits of the Yacoraite Formation, NW Argentina: distribution, environments, paleoecology, and economic implications

Abstract: The Yacoraite Formation (NW Argentina) displays important microbialitic deposits of varied features throughout its six sub-basins. With the discovery of important microbialitic hydrocarbon reservoirs and the interest in lacustrine systems due to recent hydrocarbon finds in the presalt Cretaceous series of the South Atlantic, the importance of these organo-sedimentary structures has increased considerably. Because of this, in the past decade, numerous works in Yacoraite Formation have focused on its microbialit… Show more

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Cited by 3 publications
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“…Conceivably correlating with this Formation (Charrier and Reutter, 1994), small inliers of Late Cretaceous-early Paleogene Yacoraite Formation occur >120 km to the SE of El Tatio in Argentina (Rubiolo et al, 2003), and the equivalent Molina Formation some 85 km NE of El Tatio in Bolivia (Pacheco and Ramirez, 1997). Although these may represent a continuous extension of lacustrine/marine conditions underlying the current volcanic arc, both these formations show facies interpreted as lacustrine shorelines (Rohais et al, 2019;Deschamps et al, 2020;Mutti et al, 2023;Villafañe et al, 2023), which might negate any extension to the Loa catchment. The Na-normalized plot of HCO 3 :Ca (Figure 5B) does not indicate any significant carbonate in Salado-Toconce baseflow, other than soil/plant CO 2 generation, nor do the HCO 3 :Cl and Ca:Cl ratios suggest the presence of deep carbonates (Figures 5viii, 5x).…”
Section: Potential Sources Of Invariant Rechargementioning
confidence: 98%
“…Conceivably correlating with this Formation (Charrier and Reutter, 1994), small inliers of Late Cretaceous-early Paleogene Yacoraite Formation occur >120 km to the SE of El Tatio in Argentina (Rubiolo et al, 2003), and the equivalent Molina Formation some 85 km NE of El Tatio in Bolivia (Pacheco and Ramirez, 1997). Although these may represent a continuous extension of lacustrine/marine conditions underlying the current volcanic arc, both these formations show facies interpreted as lacustrine shorelines (Rohais et al, 2019;Deschamps et al, 2020;Mutti et al, 2023;Villafañe et al, 2023), which might negate any extension to the Loa catchment. The Na-normalized plot of HCO 3 :Ca (Figure 5B) does not indicate any significant carbonate in Salado-Toconce baseflow, other than soil/plant CO 2 generation, nor do the HCO 3 :Cl and Ca:Cl ratios suggest the presence of deep carbonates (Figures 5viii, 5x).…”
Section: Potential Sources Of Invariant Rechargementioning
confidence: 98%