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Artículo

Decoding depositional and diagenetic conditions of the mid-Cenozoic Puesto del Museo Formation, southern Golfo San Jorge Basin, Patagonia, Argentina

Gómez Peral, LuciaIcon ; Raigemborn, María SolIcon ; Richiano, Sebastián MiguelIcon ; Arrouy, Maria JuliaIcon ; Odino Barreto, Andrea LorenaIcon ; Pérez, Leandro MartínIcon ; Sial, Alcides N.; Ferreyra, Camila
Fecha de publicación: 12/2019
Editorial: Pergamon-Elsevier Science Ltd
Revista: Journal of South American Earth Sciences
ISSN: 0895-9811
Idioma: Inglés
Tipo de recurso: Artículo publicado
Clasificación temática:
Geología

Resumen

This paper describes an integrated field, petrographic and geochemical study of the Puesto del Museo Formation, a poorly known unit that evidences a Cenozoic transgression at the southernmost Golfo San Jorge Basin. The most striking features of the Puesto del Museo Formation is its occurrence as restricted ~20 m-thick-outcrops composed exclusively of friable cross-stratified grainstones. We analyzed the sedimentary facies and facies associations in order to reconstruct the depositional setting. The petrographic characterization allows assessing the composition as a very homogeneous lithological succession dominated by skeletal grainstones. Geochemistry of trace elements (Mn, Sr, Rb, rare earth elements plus yttrium = REY), and stable isotopes (C and O) were used to characterize the grainstones compositionally, and to constrain environmental and climate conditions that controlled its deposition. The diagenetic environmental comprehension helped to the interpretations of the syn- and post-depositional conditions related to the grainstones. Finally, the stratigraphic position of the Puesto del Museo grainstones into the context of the basin is discussed. This succession can be correlated with the Patagonian marine event (i.e., Golfo San Jorge and Austral basins) that took place during the late Oligocene–early Miocene, related to an elevated global sea level controlled by glacio-eustatic conditions.
Palabras clave: BIOCLASTIC CARBONATES , ISOTOPE GEOCHEMISTRY , MARINE REY SIGNAL , SANTA CRUZ PROVINCE , SHALLOW MARINE DEPOSITS
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info:eu-repo/semantics/restrictedAccess Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Creative Commons Attribution-NonCommercial-ShareAlike 2.5 Unported (CC BY-NC-SA 2.5)
Identificadores
URI: http://hdl.handle.net/11336/94023
URL: https://www.sciencedirect.com/science/article/pii/S0895981119303426
DOI: http://dx.doi.org/10.1016/j.jsames.2019.102356
Colecciones
Articulos(CIG)
Articulos de CENTRO DE INVEST.GEOLOGICAS (I)
Articulos(IPGP)
Articulos de INSTITUTO PATAGONICO DE GEOLOGIA Y PALEONTOLOGIA
Citación
Gómez Peral, Lucia; Raigemborn, María Sol; Richiano, Sebastián Miguel; Arrouy, Maria Julia; Odino Barreto, Andrea Lorena; et al.; Decoding depositional and diagenetic conditions of the mid-Cenozoic Puesto del Museo Formation, southern Golfo San Jorge Basin, Patagonia, Argentina; Pergamon-Elsevier Science Ltd; Journal of South American Earth Sciences; 96; 12-2019; 1-17
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