Tectonic control of the Neocomian volcaniclastic sequences and paleogeography in Lago La Plata region (45°S). Inner sector of the lagos La Plata and Fontana fold and thrust belt

The area of Lago La Plata in Argentina is an outstanding site to address the relationship between the platform sequences which filled the Lower Cretaceous Rio Mayo basin through the western sector of the basin, and the arc-derived materials in the western sectors. The study of these sequences shows...

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Autores principales: Iannizzotto, N.F., Folguera, A., Leal, P.R., Iaffa, D.
Formato: JOUR
Materias:
Cretaceous
Intra-arc basin
Patagonian Andes
Rio Mayo Basin
basin fill
coral reef
fold and thrust belt
island arc
provenance
volcaniclastic deposit
La Plata Basin
South America
Western Hemisphere
World
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_00044822_v59_n4_p655_Iannizzotto
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_00044822_v59_n4_p655_Iannizzotto
record_format dspace
spelling todo:paper_00044822_v59_n4_p655_Iannizzotto2023-10-03T13:58:00Z Tectonic control of the Neocomian volcaniclastic sequences and paleogeography in Lago La Plata region (45°S). Inner sector of the lagos La Plata and Fontana fold and thrust belt Iannizzotto, N.F. Folguera, A. Leal, P.R. Iaffa, D. Cretaceous Intra-arc basin Patagonian Andes Rio Mayo Basin basin fill coral reef Cretaceous fold and thrust belt island arc provenance volcaniclastic deposit La Plata Basin South America Western Hemisphere World The area of Lago La Plata in Argentina is an outstanding site to address the relationship between the platform sequences which filled the Lower Cretaceous Rio Mayo basin through the western sector of the basin, and the arc-derived materials in the western sectors. The study of these sequences shows a series of lithostratigraphic units through an extensive mapping in the field and a petrographic study. Based on that, the basinal sequences in the western sector became much more widely extended than previously thought, not only in the basal sections of the Coyhaique Group, but also in the upper terms of this heterogeneous unit. These sequences have had two source areas. A main one from a volcanic arc, and a second source, in terms of importance, from coral reefs. It is worth noting the complete absence of craton-derived materials in these inner sectors of the Patagonian Andes. Moreover, the study of the Neocomian sequences allowed to distinguish a series of angular discontinuities, an older of Middle Cretaceous age and a younger not too well constrained, which are related to the construction of the Patagonian Andes at these latitudes. © 2004 Asociación Geológica Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00044822_v59_n4_p655_Iannizzotto
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Cretaceous
Intra-arc basin
Patagonian Andes
Rio Mayo Basin
basin fill
coral reef
Cretaceous
fold and thrust belt
island arc
provenance
volcaniclastic deposit
La Plata Basin
South America
Western Hemisphere
World
spellingShingle Cretaceous
Intra-arc basin
Patagonian Andes
Rio Mayo Basin
basin fill
coral reef
Cretaceous
fold and thrust belt
island arc
provenance
volcaniclastic deposit
La Plata Basin
South America
Western Hemisphere
World
Iannizzotto, N.F.
Folguera, A.
Leal, P.R.
Iaffa, D.
Tectonic control of the Neocomian volcaniclastic sequences and paleogeography in Lago La Plata region (45°S). Inner sector of the lagos La Plata and Fontana fold and thrust belt
topic_facet Cretaceous
Intra-arc basin
Patagonian Andes
Rio Mayo Basin
basin fill
coral reef
Cretaceous
fold and thrust belt
island arc
provenance
volcaniclastic deposit
La Plata Basin
South America
Western Hemisphere
World
description The area of Lago La Plata in Argentina is an outstanding site to address the relationship between the platform sequences which filled the Lower Cretaceous Rio Mayo basin through the western sector of the basin, and the arc-derived materials in the western sectors. The study of these sequences shows a series of lithostratigraphic units through an extensive mapping in the field and a petrographic study. Based on that, the basinal sequences in the western sector became much more widely extended than previously thought, not only in the basal sections of the Coyhaique Group, but also in the upper terms of this heterogeneous unit. These sequences have had two source areas. A main one from a volcanic arc, and a second source, in terms of importance, from coral reefs. It is worth noting the complete absence of craton-derived materials in these inner sectors of the Patagonian Andes. Moreover, the study of the Neocomian sequences allowed to distinguish a series of angular discontinuities, an older of Middle Cretaceous age and a younger not too well constrained, which are related to the construction of the Patagonian Andes at these latitudes. © 2004 Asociación Geológica Argentina.
format JOUR
author Iannizzotto, N.F.
Folguera, A.
Leal, P.R.
Iaffa, D.
author_facet Iannizzotto, N.F.
Folguera, A.
Leal, P.R.
Iaffa, D.
author_sort Iannizzotto, N.F.
title Tectonic control of the Neocomian volcaniclastic sequences and paleogeography in Lago La Plata region (45°S). Inner sector of the lagos La Plata and Fontana fold and thrust belt
title_short Tectonic control of the Neocomian volcaniclastic sequences and paleogeography in Lago La Plata region (45°S). Inner sector of the lagos La Plata and Fontana fold and thrust belt
title_full Tectonic control of the Neocomian volcaniclastic sequences and paleogeography in Lago La Plata region (45°S). Inner sector of the lagos La Plata and Fontana fold and thrust belt
title_fullStr Tectonic control of the Neocomian volcaniclastic sequences and paleogeography in Lago La Plata region (45°S). Inner sector of the lagos La Plata and Fontana fold and thrust belt
title_full_unstemmed Tectonic control of the Neocomian volcaniclastic sequences and paleogeography in Lago La Plata region (45°S). Inner sector of the lagos La Plata and Fontana fold and thrust belt
title_sort tectonic control of the neocomian volcaniclastic sequences and paleogeography in lago la plata region (45°s). inner sector of the lagos la plata and fontana fold and thrust belt
url http://hdl.handle.net/20.500.12110/paper_00044822_v59_n4_p655_Iannizzotto
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