Lower Cretaceous provenance in the northern Austral basin of Patagonia from sedimentary petrography
The northern Austral basin from Patagonia is characterized by an Early Cretaceous (Barremian-Albian) coarse-grained regressive sequence. These littoral to continental deposits conform a 150 km long basin cropping out along the Southern Patagonian Andes between 47 and 48°S. The basin fill consist of...
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2015
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_08959811_v64_n_p498_Barberon http://hdl.handle.net/20.500.12110/paper_08959811_v64_n_p498_Barberon |
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paper:paper_08959811_v64_n_p498_Barberon2023-06-08T15:48:52Z Lower Cretaceous provenance in the northern Austral basin of Patagonia from sedimentary petrography Austral basin Early Cretaceous Sandstone provenance Sedimentary petrography Southern Patagonian Andes basin fill Cretaceous depocenter geodynamics paleoenvironment petrography provenance sandstone sedimentary petrology stratigraphy Andes Austral Basin Patagonia The northern Austral basin from Patagonia is characterized by an Early Cretaceous (Barremian-Albian) coarse-grained regressive sequence. These littoral to continental deposits conform a 150 km long basin cropping out along the Southern Patagonian Andes between 47 and 48°S. The basin fill consist of basal deltaic sandstones with interbedded shales and limestones from the Río Belgrano Formation, topped by up to 350 m of fluvial conglomerates and reworked tuffs of the Río Tarde and Kachaike formations. This continental depocenter represent a major geodynamic and paleoenviromental change from the underling marine Río Mayer Formation. In this study we analyze the tectonic setting and provenance during deposition of the coarse-grained sequence using sedimentary petrography of 37 thin sections in four stratigraphic profiles covering the northern basin. Our dataset indicates mainly a recycled orogenic sandstones provenance, in agreement with potential surrounding basement sources. © 2015 Elsevier Ltd. 2015 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_08959811_v64_n_p498_Barberon http://hdl.handle.net/20.500.12110/paper_08959811_v64_n_p498_Barberon |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Austral basin Early Cretaceous Sandstone provenance Sedimentary petrography Southern Patagonian Andes basin fill Cretaceous depocenter geodynamics paleoenvironment petrography provenance sandstone sedimentary petrology stratigraphy Andes Austral Basin Patagonia |
| spellingShingle |
Austral basin Early Cretaceous Sandstone provenance Sedimentary petrography Southern Patagonian Andes basin fill Cretaceous depocenter geodynamics paleoenvironment petrography provenance sandstone sedimentary petrology stratigraphy Andes Austral Basin Patagonia Lower Cretaceous provenance in the northern Austral basin of Patagonia from sedimentary petrography |
| topic_facet |
Austral basin Early Cretaceous Sandstone provenance Sedimentary petrography Southern Patagonian Andes basin fill Cretaceous depocenter geodynamics paleoenvironment petrography provenance sandstone sedimentary petrology stratigraphy Andes Austral Basin Patagonia |
| description |
The northern Austral basin from Patagonia is characterized by an Early Cretaceous (Barremian-Albian) coarse-grained regressive sequence. These littoral to continental deposits conform a 150 km long basin cropping out along the Southern Patagonian Andes between 47 and 48°S. The basin fill consist of basal deltaic sandstones with interbedded shales and limestones from the Río Belgrano Formation, topped by up to 350 m of fluvial conglomerates and reworked tuffs of the Río Tarde and Kachaike formations. This continental depocenter represent a major geodynamic and paleoenviromental change from the underling marine Río Mayer Formation. In this study we analyze the tectonic setting and provenance during deposition of the coarse-grained sequence using sedimentary petrography of 37 thin sections in four stratigraphic profiles covering the northern basin. Our dataset indicates mainly a recycled orogenic sandstones provenance, in agreement with potential surrounding basement sources. © 2015 Elsevier Ltd. |
| title |
Lower Cretaceous provenance in the northern Austral basin of Patagonia from sedimentary petrography |
| title_short |
Lower Cretaceous provenance in the northern Austral basin of Patagonia from sedimentary petrography |
| title_full |
Lower Cretaceous provenance in the northern Austral basin of Patagonia from sedimentary petrography |
| title_fullStr |
Lower Cretaceous provenance in the northern Austral basin of Patagonia from sedimentary petrography |
| title_full_unstemmed |
Lower Cretaceous provenance in the northern Austral basin of Patagonia from sedimentary petrography |
| title_sort |
lower cretaceous provenance in the northern austral basin of patagonia from sedimentary petrography |
| publishDate |
2015 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_08959811_v64_n_p498_Barberon http://hdl.handle.net/20.500.12110/paper_08959811_v64_n_p498_Barberon |
| _version_ |
1768546354223644672 |