Constraining depositional evolution and reservoir compartmentalization in a mixed carbonate-siliciclastic lacustrine system: The Yacoraite formation, Salta Group, NW Argentina

Mutti, Maria; Vallati, Michele; Tomás, Sara; Galli, Claudia Inés; Rumbelsperger, A. M. Bahniuk; Maerz, Sven; Coira, Beatríz

doi:10.1016/j.marpetgeo.2022.106049

Cited by 5 publications

(4 citation statements)

References 39 publications

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“…Using GPS data Klotz et al (2001) suggest deformation is dominated by the earthquake cycle which causes compression, followed by rebound in the direction of plate convergence. Furthermore, Scheihing (2023) demonstrates a substantial increase in transient groundwater flow following a 7.8 M W earthquake in the forearc, confirming the relevance of seismic activity to surface and groundwater flow.…”

Section: Potential Structural Controls On Hydrologymentioning

confidence: 61%

The provenance and persistence of the perennial Río Loa in the Atacama Desert: links between crustal processes and surface hydrology

Houston

2023

Front. Earth Sci.

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The Río Loa is a perennial river that crosses the Atacama Desert. A basin-wide survey enables for the first time, the hydrologic regime origin, persistence and processes to be identified. Perennial baseflow in the Ríos Loa and Salado largely originates from intra-arc aquifers which are poorly known. However, the data indicate that despite flood flow being largely confined to the summer (DJF) season, sufficient storage exists in these aquifers to maintain year-round stream flow from high-altitude, across the Atacama Desert to the coast. The intra-arc aquifers of the Western Cordillera receive recharge from time-variable precipitation infiltration and time-invariant lithospheric inputs. Lithospheric inputs potentially include slab/mantle dehydration, upper crustal melt devolatilization and/or thermally induced upflow of deeply penetrating meteoric water through buried evaporites or carbonates. Downstream, aquifers in the Pre-Andean basins variably interact with surface water, depending on location, river stage and time of year, but they do not supply significant additional sources of baseflow. Hydrochemical processes include those related to volcanic activity, soil carbonate generation, silicate weathering, CO2 degassing and calcite precipitation. Solutes undergo concentration by evaporation, gypsum dissolution, and are further affected by localized NO3, and SO4 inputs and mixing with saline waters. Stable isotopes reveal subcatchment specific precipitation and evaporation, whilst carbon and tritium isotopes are used to analyze recharge sources and processes in the intra-arc aquifers and downstream mixing.

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Section: Potential Structural Controls On Hydrologymentioning

confidence: 61%

The provenance and persistence of the perennial Río Loa in the Atacama Desert: links between crustal processes and surface hydrology

Houston

2023

Front. Earth Sci.

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“…The palaeontological record includes gastropods, ostracods, avian and non-avian dinosaur tracks and few preserved palynomorphs that agree with a Maastrichtian-Danian age for the formation [31,32,35,55,[63][64][65][66][67][68][69][70][71][72][73][74][75]. A recent U-Pb zircon geochronology survey on interbedded volcanic ash layers established a sedimentation time between 68.1 ± 0.9 Ma and 62.3 ± 0.5 Ma [40].…”

Section: Geological Contextmentioning

confidence: 94%

“…deposited during the main sag phase of the rift and consists of a lacustrine mixed carbonate-siliciclastic succession deposited in a hydrologically closed lake characterised by semi-arid palaeoclimatic conditions [30]. The formation reaches 220 m in thickness in the main depocentres and comprises mudstones, oolitic packstones to grainstones and a large diversity of microbial boundstones, interbedded with fine-to coarse-grained sandstones, as well as organic-rich deposits, e.g., [30,[56][57][58][59][60][61][62][63]. The predominance of shallow marginal facies (Figure 2) suggests a low to medium gradient ramp-type margin depositional environment where siliciclastic-dominated facies are mainly located along previous footwall margins, and carbonate-dominated ones preferentially occur in palaeohighs away from siliciclastic inputs [30,38].…”

Section: Geological Contextmentioning

confidence: 99%

“…The stratigraphic architecture of the Yacoraite Fm. was primarily controlled by climate changes [30,38] and the sedimentation pattern and stratigraphic framework are characterised by multiple hierarchies of cyclicity [30,38,[57][58][59]63,[76][77][78][79]. The present study considers the mid-term cyclicity reported by [30,38] for the Metán-Alemania sub-basins.…”

Section: Geological Contextmentioning

confidence: 99%

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A Lacustrine Record for the Cretaceous–Paleogene Boundary—Yacoraite Fm., (Northwest Argentina)

et al. 2023

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The Yacoraite Fm. (Salta rift basin, Argentina) consists of a mixed carbonate–siliciclastic lacustrine succession, interbedded with volcanic ash layers and organised in four third-order stratigraphic sequences. It is one of the few sites in South America that encompass the Cretaceous–Paleogene (K–Pg) transition, the position of which remains debated. Here, samples were collected along a depocentral stratigraphic section that was previously dated by zircon and carbonate U-Pb geochronology. The consistency between zircon and carbonate U-Pb ages, together with an accurate petrographic analysis, allowed the selection of carbonates potentially preserving the original geochemical signature. Accordingly, C-O stable isotopes were analysed from microbialites, oncoids, ooids and lacustrine cements. The available depositional age model from zircon geochronology defined the stratigraphic interval, potentially including the K–Pg transition. Within this interval, carbonates provided negative δ13C values consistent with the negative C anomaly recorded in various K–Pg sites elsewhere. Additionally, spherical particles resembling spherulites related to meteorite impacts were found in two samples. Accordingly, the K–Pg transition could be placed at the top of the second stratigraphic sequence. These findings encourage further investigation of the Yacoraite Fm. to gain insights into the response of South American terrestrial settings to the K–Pg palaeoenvironmental crisis.

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The impact of microbial mats in promoting record of Maastrichtian crocodylomorph tracks from Yacoraite Formation, Argentina

Martín,

de Valais,

Díaz-Martínez

et al. 2025

Cretaceous Research

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Constraining depositional evolution and reservoir compartmentalization in a mixed carbonate-siliciclastic lacustrine system: The Yacoraite formation, Salta Group, NW Argentina

Cited by 5 publications

References 39 publications

The provenance and persistence of the perennial Río Loa in the Atacama Desert: links between crustal processes and surface hydrology

The provenance and persistence of the perennial Río Loa in the Atacama Desert: links between crustal processes and surface hydrology

A Lacustrine Record for the Cretaceous–Paleogene Boundary—Yacoraite Fm., (Northwest Argentina)

The impact of microbial mats in promoting record of Maastrichtian crocodylomorph tracks from Yacoraite Formation, Argentina

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