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Historia evolutiva paleoambiental del depocentro del salar de Pozuelos (Puna Austral)

Authors: MARTÍNEZ, Verónica Rocío; ALONSO, Ricardo N.; GALLI, Claudia Inés;

Historia evolutiva paleoambiental del depocentro del salar de Pozuelos (Puna Austral)

Abstract

In this paper, it is introduced the paleoenvironmental evolutionary history of the Pozuelos salar depocenter (Puna Austral, Salta. Argentina). In base of different drill holes, two different fillings are recognized and they are separated by a gypsum paleosoil related to the tectonic stability in the basin. The first filling is located at the salar base and consist of immature fill (clastic or muddy facies) suggesting a slightly more moist (but still arid) deposition and higher contribution of clastic sediment. The second filling is located at the salar top and consist of a mature fill (evaporitic or crystalline facies). The evaporitic facies are dominant with minor amount of detrital sediments, which indicates arid climatic conditions similar to the present-day in the Puna. This contribution identified two different and genetically interrelated deposits saline mudflat and saline pan; they correspond to an ephemeral saline lake sub environment. In this context, the described fill of the salar comprises a deposition model typical of a saline lake environment.

Este trabajo presenta la historia evolutiva paleoambiental del depocentro del salar de Pozuelos (Puna Austral, Salta. Argentina). El salar, en base al análisis de datos de subsuelo consta de dos rellenos diferentes separadas por un paleosuelo yesífero, relacionado a la estabilidad tectónica en la cuenca. De base a techo, el primer relleno es de tipo inmaduro (facies clásticas o terrosas) que sugiere una depositación ligeramente más húmeda (pero todavía árida) y con mayor aporte de sedimento clástico. El segundo relleno del techo es de tipo maduro (facies evaporíticas o cristalinas), donde las facies evaporíticas son dominantes con escasos sedimentos detríticos, lo que indica condiciones climáticas áridas similares a las actuales en la Puna. Comprende así, un modelo de depositación típico de un ambiente de lago salino, perteneciente al subambiente lago salino efímero y dentro de él se identificaron dos depósitos diferentes y genéticamente interrelacionados saline mudflat y saline pan.

Fil: Martínez, Verónica Rocío. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Tucumán. Instituto Superior de Correlación Geológica. Grupo Vinculado al INSUGEO- Centro de Estudios Geologicos Andinos; Argentina

Fil: Alonso, Ricardo Narciso. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Tucumán. Instituto Superior de Correlación Geológica. Grupo Vinculado al INSUGEO- Centro de Estudios Geologicos Andinos; Argentina

Fil: Galli, Claudia Inés. Universidad Nacional de Jujuy. Instituto de Ecorregiones Andinas. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Salta. Instituto de Ecorregiones Andinas; Argentina

Country
Argentina
Keywords

Salar Pozuelos. Lago salino. Saline mudflat. Saline pan. Paleoambiente. Salar maduros e inmaduros., Salar Pozuelos, Paleoambiente, Palaeoenviroment, Mature and inmature salars, SALINE PAN, Lago salino, Pozuelos salar. Saline Lake. Saline mudflat. Saline pan. Palaeoenviroment. Mature and in-mature salars., Saline mudflat, Saline pan, https://purl.org/becyt/ford/1.5, SALINE MUDFLAT, Salar maduros e inmaduros., Pozuelos salar, SALAR DE POZUELOS, https://purl.org/becyt/ford/1, Saline Lake, LAGO SALINO

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This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
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popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
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influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
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impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
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