Marine Phosphates in the Paleogene oflsla Grande de Tîerra del Fuego

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Phosphate prospecting in marine sedimentary rocks of the Marginal and Austral basins of the Isla Grande de Tierra del Fuego resulted in the first discovery of phosphatic beds in the Paleogene Rio Claro Formation. Phosphatic anomalies of up to 20.1% P2U5 in concretions and up to 2% PaOs in bulk rock...

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Autores principales:	Olivero, E.B., Castrq, L.N., Scasso, R.A., Faziq, A.M., Miretzky, P.
Formato:	Artículo publishedVersion
Publicado:	1998
Materias:	marine sediment Paleogene phosphate South America
Acceso en línea:	http://hdl.handle.net/20.500.12110/paper_00044822_v53_n2_p239_Olivero https://repositoriouba.sisbi.uba.ar/gsdl/cgi-bin/library.cgi?a=d&c=artiaex&d=paper_00044822_v53_n2_p239_Olivero_oai
Aporte de:	Repositorio Digital de la Universidad de Buenos Aires (UBA) de Universidad de Buenos Aires

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spelling	I28-R145-paper_00044822_v53_n2_p239_Olivero_oai2024-08-16 Olivero, E.B. Castrq, L.N. Scasso, R.A. Faziq, A.M. Miretzky, P. 1998 Phosphate prospecting in marine sedimentary rocks of the Marginal and Austral basins of the Isla Grande de Tierra del Fuego resulted in the first discovery of phosphatic beds in the Paleogene Rio Claro Formation. Phosphatic anomalies of up to 20.1% P2U5 in concretions and up to 2% PaOs in bulk rock offer promising opportunities for systematic prospection on the Isla Grande de Tierra del Fuego. The phosphatic beds are conglomerates, coquinas and conglomeratic sandstones interbedded with thick mudstone packets. They belong to the condensed-type phosphatic beds, which are the product of erosion and reworking of concretions developed in fine sediments. Phosphate concretions containing glauconite, together with abundant glauconite in the same and closely associated beds, indicate a common syn-sedimentary to earlydiagenetic origin for both minerals, via recycling of sedimentary iron. This process occurred on a shelf with low sedimentation rates, pointing to high sea-level stands and marked interruptions in the sedimentation of the thick Paleogene sedimentary sequence of the Austral Basin . The deposit point to the existence and extension of this early Cenozoic phosphogenic episode to high latitudes in the Southern Hemisphere. © 1998 Asociacidn Geoldgica Argentina. Fil:Olivero, E.B. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Scasso, R.A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Miretzky, P. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. application/pdf http://hdl.handle.net/20.500.12110/paper_00044822_v53_n2_p239_Olivero info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar Rev. Asoc. Geol. Argent. 1998;53(2):239-246 marine sediment Paleogene phosphate South America Marine Phosphates in the Paleogene oflsla Grande de Tîerra del Fuego info:eu-repo/semantics/article info:ar-repo/semantics/artículo info:eu-repo/semantics/publishedVersion https://repositoriouba.sisbi.uba.ar/gsdl/cgi-bin/library.cgi?a=d&c=artiaex&d=paper_00044822_v53_n2_p239_Olivero_oai
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-145
collection	Repositorio Digital de la Universidad de Buenos Aires (UBA)
topic	marine sediment Paleogene phosphate South America
spellingShingle	marine sediment Paleogene phosphate South America Olivero, E.B. Castrq, L.N. Scasso, R.A. Faziq, A.M. Miretzky, P. Marine Phosphates in the Paleogene oflsla Grande de Tîerra del Fuego
topic_facet	marine sediment Paleogene phosphate South America
description	Phosphate prospecting in marine sedimentary rocks of the Marginal and Austral basins of the Isla Grande de Tierra del Fuego resulted in the first discovery of phosphatic beds in the Paleogene Rio Claro Formation. Phosphatic anomalies of up to 20.1% P2U5 in concretions and up to 2% PaOs in bulk rock offer promising opportunities for systematic prospection on the Isla Grande de Tierra del Fuego. The phosphatic beds are conglomerates, coquinas and conglomeratic sandstones interbedded with thick mudstone packets. They belong to the condensed-type phosphatic beds, which are the product of erosion and reworking of concretions developed in fine sediments. Phosphate concretions containing glauconite, together with abundant glauconite in the same and closely associated beds, indicate a common syn-sedimentary to earlydiagenetic origin for both minerals, via recycling of sedimentary iron. This process occurred on a shelf with low sedimentation rates, pointing to high sea-level stands and marked interruptions in the sedimentation of the thick Paleogene sedimentary sequence of the Austral Basin . The deposit point to the existence and extension of this early Cenozoic phosphogenic episode to high latitudes in the Southern Hemisphere. © 1998 Asociacidn Geoldgica Argentina.
format	Artículo Artículo publishedVersion
author	Olivero, E.B. Castrq, L.N. Scasso, R.A. Faziq, A.M. Miretzky, P.
author_facet	Olivero, E.B. Castrq, L.N. Scasso, R.A. Faziq, A.M. Miretzky, P.
author_sort	Olivero, E.B.
title	Marine Phosphates in the Paleogene oflsla Grande de Tîerra del Fuego
title_short	Marine Phosphates in the Paleogene oflsla Grande de Tîerra del Fuego
title_full	Marine Phosphates in the Paleogene oflsla Grande de Tîerra del Fuego
title_fullStr	Marine Phosphates in the Paleogene oflsla Grande de Tîerra del Fuego
title_full_unstemmed	Marine Phosphates in the Paleogene oflsla Grande de Tîerra del Fuego
title_sort	marine phosphates in the paleogene oflsla grande de tîerra del fuego
publishDate	1998
url	http://hdl.handle.net/20.500.12110/paper_00044822_v53_n2_p239_Olivero https://repositoriouba.sisbi.uba.ar/gsdl/cgi-bin/library.cgi?a=d&c=artiaex&d=paper_00044822_v53_n2_p239_Olivero_oai
work_keys_str_mv	AT oliveroeb marinephosphatesinthepaleogeneoflslagrandedetierradelfuego AT castrqln marinephosphatesinthepaleogeneoflslagrandedetierradelfuego AT scassora marinephosphatesinthepaleogeneoflslagrandedetierradelfuego AT faziqam marinephosphatesinthepaleogeneoflslagrandedetierradelfuego AT miretzkyp marinephosphatesinthepaleogeneoflslagrandedetierradelfuego
_version_	1809356760183472128

Marine Phosphates in the Paleogene oflsla Grande de Tîerra del Fuego

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