Abstract

MARTINEZ, Verónica Rocío; ALONSO, Ricardo N.  and  GALLI, Claudia Inés. PALEOENVIRONMENTAL EVOLUTIONARY HISTORY OF THE DEPO-CENTER OF THE SALAR DE POZUELOS (SOUTHERN PUNA). Ser. correl. geol. [online]. 2018, vol.34, n.2, pp.1-10. ISSN 1666-9479.

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 interrela-ted 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.

Keywords : Pozuelos salar. Saline Lake. Saline mudflat. Saline pan. Palaeoenviroment. Mature and in-mature salars..

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