Sedimentology and palaeoenvironmental evolution of the Patquía Formation (Permian), in the Sierra de Maz and cerro Bola, La Rioja Province, Argentina

The sedimentological characteristics of the Patquía Formation in the Sierra de Maz and Cerro Bola areas were analyzed. Seven facies associations were recognized at four stratigraphical sections: Cerro Guandacol, La Cortadera. Cerro Noqués and Cerro Bola. Facies A is composed of agglomerates, breccia...

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Detalles Bibliográficos
Publicado: 2002
Materias:
Paganzo Basin
Paleoanvironoent
Patquía Formation
Permian
depositional sequence
facies analysis
paleoenvironment
sedimentology
stratigraphy
Argentina
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00044822_v57_n4_p415_Caselli
http://hdl.handle.net/20.500.12110/paper_00044822_v57_n4_p415_Caselli
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
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spelling paper:paper_00044822_v57_n4_p415_Caselli2023-06-08T14:25:38Z Sedimentology and palaeoenvironmental evolution of the Patquía Formation (Permian), in the Sierra de Maz and cerro Bola, La Rioja Province, Argentina Paganzo Basin Paleoanvironoent Patquía Formation Permian depositional sequence facies analysis paleoenvironment Permian sedimentology stratigraphy Argentina The sedimentological characteristics of the Patquía Formation in the Sierra de Maz and Cerro Bola areas were analyzed. Seven facies associations were recognized at four stratigraphical sections: Cerro Guandacol, La Cortadera. Cerro Noqués and Cerro Bola. Facies A is composed of agglomerates, breccias and conglomerates, deposited in small alluvial fans. Coarse sandstones and conglomerates of facies B were probably deposited in braided fluvial plains. Facies C comprises conglomerates and coarse sandstones from low to moderate sinuosity rivers. The most widespread association is facies D that consists of very coarse sandstones, fine sandstones, mudstones and tuffs. These rocks are interpreted as originating from high sinuosity channel migration across broad alluvial plains. Eolian sedimentation is registered in facies E composed of very fine to medium cross-bedded sandstones. Interbedded mudstones and fine sandstones (facies F) are interpreted as deposited in a shallow permanent lake dominated by clastic sedimentation. Facies G consists of white sandstone and pink mudstone, with minor proportions of large-scale, cross-bedded fine sandstone. It was deposited by low to moderate sinuosity fluvial systems on well-developed alluvial plains with isolated eolian dunes. Modal compositions of the sandstones revealed three petrofacies. The cuarzofeldica petrofacies represents the provenance of the Sierras Pampeanas basement. The cuarzofeldlítica ' petrofacies includes important amounts of acid and mesosilicic volcanic clasts related to the Permo-Triassic volcanic belt. The litomíxtica petrofacies shows high proportions of sedimentary and palaeovolcanic rock fragments from the Precordillera area. Stratigraphical analysis of the Patquía Formation allows recognition of two depositional sequences, SDi (lower) and SDs (upper). igraphical analysis of the Patquía Formation allows recognition of two depositional sequences, SDi (lower) and SDs (upper). 2002 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00044822_v57_n4_p415_Caselli http://hdl.handle.net/20.500.12110/paper_00044822_v57_n4_p415_Caselli
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Paganzo Basin
Paleoanvironoent
Patquía Formation
Permian
depositional sequence
facies analysis
paleoenvironment
Permian
sedimentology
stratigraphy
Argentina
spellingShingle Paganzo Basin
Paleoanvironoent
Patquía Formation
Permian
depositional sequence
facies analysis
paleoenvironment
Permian
sedimentology
stratigraphy
Argentina
Sedimentology and palaeoenvironmental evolution of the Patquía Formation (Permian), in the Sierra de Maz and cerro Bola, La Rioja Province, Argentina
topic_facet Paganzo Basin
Paleoanvironoent
Patquía Formation
Permian
depositional sequence
facies analysis
paleoenvironment
Permian
sedimentology
stratigraphy
Argentina
description The sedimentological characteristics of the Patquía Formation in the Sierra de Maz and Cerro Bola areas were analyzed. Seven facies associations were recognized at four stratigraphical sections: Cerro Guandacol, La Cortadera. Cerro Noqués and Cerro Bola. Facies A is composed of agglomerates, breccias and conglomerates, deposited in small alluvial fans. Coarse sandstones and conglomerates of facies B were probably deposited in braided fluvial plains. Facies C comprises conglomerates and coarse sandstones from low to moderate sinuosity rivers. The most widespread association is facies D that consists of very coarse sandstones, fine sandstones, mudstones and tuffs. These rocks are interpreted as originating from high sinuosity channel migration across broad alluvial plains. Eolian sedimentation is registered in facies E composed of very fine to medium cross-bedded sandstones. Interbedded mudstones and fine sandstones (facies F) are interpreted as deposited in a shallow permanent lake dominated by clastic sedimentation. Facies G consists of white sandstone and pink mudstone, with minor proportions of large-scale, cross-bedded fine sandstone. It was deposited by low to moderate sinuosity fluvial systems on well-developed alluvial plains with isolated eolian dunes. Modal compositions of the sandstones revealed three petrofacies. The cuarzofeldica petrofacies represents the provenance of the Sierras Pampeanas basement. The cuarzofeldlítica ' petrofacies includes important amounts of acid and mesosilicic volcanic clasts related to the Permo-Triassic volcanic belt. The litomíxtica petrofacies shows high proportions of sedimentary and palaeovolcanic rock fragments from the Precordillera area. Stratigraphical analysis of the Patquía Formation allows recognition of two depositional sequences, SDi (lower) and SDs (upper). igraphical analysis of the Patquía Formation allows recognition of two depositional sequences, SDi (lower) and SDs (upper).
title Sedimentology and palaeoenvironmental evolution of the Patquía Formation (Permian), in the Sierra de Maz and cerro Bola, La Rioja Province, Argentina
title_short Sedimentology and palaeoenvironmental evolution of the Patquía Formation (Permian), in the Sierra de Maz and cerro Bola, La Rioja Province, Argentina
title_full Sedimentology and palaeoenvironmental evolution of the Patquía Formation (Permian), in the Sierra de Maz and cerro Bola, La Rioja Province, Argentina
title_fullStr Sedimentology and palaeoenvironmental evolution of the Patquía Formation (Permian), in the Sierra de Maz and cerro Bola, La Rioja Province, Argentina
title_full_unstemmed Sedimentology and palaeoenvironmental evolution of the Patquía Formation (Permian), in the Sierra de Maz and cerro Bola, La Rioja Province, Argentina
title_sort sedimentology and palaeoenvironmental evolution of the patquía formation (permian), in the sierra de maz and cerro bola, la rioja province, argentina
publishDate 2002
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00044822_v57_n4_p415_Caselli
http://hdl.handle.net/20.500.12110/paper_00044822_v57_n4_p415_Caselli
_version_ 1768544574355013632

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