Paleoenvironmental interpretation and palynology of outcrop and subsurface sections of the Tarija Formation (Upper Carboniferous), northwestern Argentina

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The Tarija Formation of the Macharetí Group has been studied sedimentologically and palynologically at Zanja Honda Creek and the Zanja Honda x-1 well to assess the paleoenviromental and paleoclimatic evolution of the southern portion of the Tarija Basin. In addition, new palynological data and their...

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Autores principales:	Papa, C.d., Pasquo, M.d.
Formato:	JOUR
Materias:	Glacioterrestrial Late Carboniferous Northwestern Argentina Palynology Sedimentation Tarija Formation Carboniferous diamictite mudstone outcrop paleoclimate paleoenvironment palynology palynomorph sandstone sedimentation Silurian Argentina South America algae Botryococcus braunii Crassispora kosankei Cristatisporites chacoparanensis Cystoptychus azcuyi Dictyotriletes bireticulatus Raistrickia radiosa
Acceso en línea:	http://hdl.handle.net/20.500.12110/paper_08959811_v23_n1_p99_Papa
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

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spelling	todo:paper_08959811_v23_n1_p99_Papa2023-10-03T15:42:43Z Paleoenvironmental interpretation and palynology of outcrop and subsurface sections of the Tarija Formation (Upper Carboniferous), northwestern Argentina Papa, C.d. Pasquo, M.d. Glacioterrestrial Late Carboniferous Northwestern Argentina Palynology Sedimentation Tarija Formation Carboniferous diamictite mudstone outcrop paleoclimate paleoenvironment palynology palynomorph sandstone sedimentation Silurian Argentina South America algae Botryococcus braunii Crassispora kosankei Cristatisporites chacoparanensis Cystoptychus azcuyi Dictyotriletes bireticulatus Raistrickia radiosa The Tarija Formation of the Macharetí Group has been studied sedimentologically and palynologically at Zanja Honda Creek and the Zanja Honda x-1 well to assess the paleoenviromental and paleoclimatic evolution of the southern portion of the Tarija Basin. In addition, new palynological data and their implications are presented. The Tarija Formation consists mainly of thick diamictites interbedded with sandstone and mudstone layers; for the first time, a varves succession is described from the cores of the ZH x-1 well. Fifty-six spore species, 18 monosaccates, 1 praecolpate pollen grain, 4 paleophytoplankton species, and much phytodebris are recorded. The indigenous miospores are assigned to the middle portion of the Dictyotriletes bireticulatus-Cristatisporites chacoparanensis (BC) Biozone di Pasquo of early Late Carboniferous (Westphalian) age. Moreover, abundant reworked palynomorphs occur in both assemblages, recording erosion of Silurian-Early Carboniferous rocks. Some Late Carboniferous species such as Crassispora kosankei (Potonié and Kremp) Bhardwaj emend. Smith and Butterworth, Cristatisporites rollerii Ottone, and Cystoptychus azcuyi di Pasquo, exclusive of the KA Biozone, and Raistrickia radiosa Playford and Helby of the RS Biozone di Pasquo are interpreted as reworked from the lower Tupambi and Itacuamí formations. A fluviolacustrine setting is interpreted for the Tarija Formation on the basis of the presence of glacial varves, continental algae such as Botryococcus braunii Kützing, and overall facies associations. A hiatus between the fluviodeltaic interglacial Tupambi-Itacuamí depositional cycle ("Cycle I") and the fluviolacustrine, glacially influenced Itacuamí-Tarija depositional cycle ("Cycle II") is suggested by the sedimentary and palynologic data. This interpretation is confirmed by short-ranged species with biostratigraphic value, as well as the recognition of useful lithological and palynological differences helpful for characterizing both similar superposed sedimentary cycles. © 2006 Elsevier Ltd. All rights reserved. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_08959811_v23_n1_p99_Papa
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	Glacioterrestrial Late Carboniferous Northwestern Argentina Palynology Sedimentation Tarija Formation Carboniferous diamictite mudstone outcrop paleoclimate paleoenvironment palynology palynomorph sandstone sedimentation Silurian Argentina South America algae Botryococcus braunii Crassispora kosankei Cristatisporites chacoparanensis Cystoptychus azcuyi Dictyotriletes bireticulatus Raistrickia radiosa
spellingShingle	Glacioterrestrial Late Carboniferous Northwestern Argentina Palynology Sedimentation Tarija Formation Carboniferous diamictite mudstone outcrop paleoclimate paleoenvironment palynology palynomorph sandstone sedimentation Silurian Argentina South America algae Botryococcus braunii Crassispora kosankei Cristatisporites chacoparanensis Cystoptychus azcuyi Dictyotriletes bireticulatus Raistrickia radiosa Papa, C.d. Pasquo, M.d. Paleoenvironmental interpretation and palynology of outcrop and subsurface sections of the Tarija Formation (Upper Carboniferous), northwestern Argentina
topic_facet	Glacioterrestrial Late Carboniferous Northwestern Argentina Palynology Sedimentation Tarija Formation Carboniferous diamictite mudstone outcrop paleoclimate paleoenvironment palynology palynomorph sandstone sedimentation Silurian Argentina South America algae Botryococcus braunii Crassispora kosankei Cristatisporites chacoparanensis Cystoptychus azcuyi Dictyotriletes bireticulatus Raistrickia radiosa
description	The Tarija Formation of the Macharetí Group has been studied sedimentologically and palynologically at Zanja Honda Creek and the Zanja Honda x-1 well to assess the paleoenviromental and paleoclimatic evolution of the southern portion of the Tarija Basin. In addition, new palynological data and their implications are presented. The Tarija Formation consists mainly of thick diamictites interbedded with sandstone and mudstone layers; for the first time, a varves succession is described from the cores of the ZH x-1 well. Fifty-six spore species, 18 monosaccates, 1 praecolpate pollen grain, 4 paleophytoplankton species, and much phytodebris are recorded. The indigenous miospores are assigned to the middle portion of the Dictyotriletes bireticulatus-Cristatisporites chacoparanensis (BC) Biozone di Pasquo of early Late Carboniferous (Westphalian) age. Moreover, abundant reworked palynomorphs occur in both assemblages, recording erosion of Silurian-Early Carboniferous rocks. Some Late Carboniferous species such as Crassispora kosankei (Potonié and Kremp) Bhardwaj emend. Smith and Butterworth, Cristatisporites rollerii Ottone, and Cystoptychus azcuyi di Pasquo, exclusive of the KA Biozone, and Raistrickia radiosa Playford and Helby of the RS Biozone di Pasquo are interpreted as reworked from the lower Tupambi and Itacuamí formations. A fluviolacustrine setting is interpreted for the Tarija Formation on the basis of the presence of glacial varves, continental algae such as Botryococcus braunii Kützing, and overall facies associations. A hiatus between the fluviodeltaic interglacial Tupambi-Itacuamí depositional cycle ("Cycle I") and the fluviolacustrine, glacially influenced Itacuamí-Tarija depositional cycle ("Cycle II") is suggested by the sedimentary and palynologic data. This interpretation is confirmed by short-ranged species with biostratigraphic value, as well as the recognition of useful lithological and palynological differences helpful for characterizing both similar superposed sedimentary cycles. © 2006 Elsevier Ltd. All rights reserved.
format	JOUR
author	Papa, C.d. Pasquo, M.d.
author_facet	Papa, C.d. Pasquo, M.d.
author_sort	Papa, C.d.
title	Paleoenvironmental interpretation and palynology of outcrop and subsurface sections of the Tarija Formation (Upper Carboniferous), northwestern Argentina
title_short	Paleoenvironmental interpretation and palynology of outcrop and subsurface sections of the Tarija Formation (Upper Carboniferous), northwestern Argentina
title_full	Paleoenvironmental interpretation and palynology of outcrop and subsurface sections of the Tarija Formation (Upper Carboniferous), northwestern Argentina
title_fullStr	Paleoenvironmental interpretation and palynology of outcrop and subsurface sections of the Tarija Formation (Upper Carboniferous), northwestern Argentina
title_full_unstemmed	Paleoenvironmental interpretation and palynology of outcrop and subsurface sections of the Tarija Formation (Upper Carboniferous), northwestern Argentina
title_sort	paleoenvironmental interpretation and palynology of outcrop and subsurface sections of the tarija formation (upper carboniferous), northwestern argentina
url	http://hdl.handle.net/20.500.12110/paper_08959811_v23_n1_p99_Papa
work_keys_str_mv	AT papacd paleoenvironmentalinterpretationandpalynologyofoutcropandsubsurfacesectionsofthetarijaformationuppercarboniferousnorthwesternargentina AT pasquomd paleoenvironmentalinterpretationandpalynologyofoutcropandsubsurfacesectionsofthetarijaformationuppercarboniferousnorthwesternargentina
_version_	1807320978685952000

Paleoenvironmental interpretation and palynology of outcrop and subsurface sections of the Tarija Formation (Upper Carboniferous), northwestern Argentina

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