Coexistence of halloysite and iron-bearing clays in an altered ignimbrite, Patagonia, Argentina

The Mamil Choique halloysite deposits of Patagonia, Argentina, contain randomly distributed green clay inclusions and patches within the halloysite mass. Halloysite has been formed from the thorough alteration of rhyolitic to dacitic ash fall tuffs and ignimbrites of the Huitrera Formation, Eocene a...

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Publicado:	2014
Materias:	Argentina halloysite iron-bearing smectites Patagonia weathering Clay deposits Iron Weathering Ambient conditions Halloysite Iron-bearing clays Octahedral sites Randomly distributed Smectites Kaolinite beidellite chemical weathering Eocene geochemical method ignimbrite
Acceso en línea:	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00098558_v49_n3_p429_Cravero http://hdl.handle.net/20.500.12110/paper_00098558_v49_n3_p429_Cravero
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	paper:paper_00098558_v49_n3_p429_Cravero
record_format	dspace
spelling	paper:paper_00098558_v49_n3_p429_Cravero2023-06-08T14:34:03Z Coexistence of halloysite and iron-bearing clays in an altered ignimbrite, Patagonia, Argentina Argentina halloysite iron-bearing smectites Patagonia weathering Clay deposits Iron Weathering Ambient conditions Argentina Halloysite Iron-bearing clays Octahedral sites Patagonia Randomly distributed Smectites Kaolinite beidellite chemical weathering Eocene geochemical method halloysite ignimbrite Patagonia The Mamil Choique halloysite deposits of Patagonia, Argentina, contain randomly distributed green clay inclusions and patches within the halloysite mass. Halloysite has been formed from the thorough alteration of rhyolitic to dacitic ash fall tuffs and ignimbrites of the Huitrera Formation, Eocene age, under ambient conditions. The smectites present in the clay inclusions have been determined as ferruginous beidellites with variables amounts of Fe3+ in octahedral sites. The weathering activity that caused the formation of halloysite was also responsible for the genesis of the iron-bearing clay minerals, the formation of which was controlled mainly by permeability. Textural variations within the rock indicate favourable local geochemical environments for the formation of the green clay minerals. © 2014 Mineralogical Society. 2014 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00098558_v49_n3_p429_Cravero http://hdl.handle.net/20.500.12110/paper_00098558_v49_n3_p429_Cravero
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	Argentina halloysite iron-bearing smectites Patagonia weathering Clay deposits Iron Weathering Ambient conditions Argentina Halloysite Iron-bearing clays Octahedral sites Patagonia Randomly distributed Smectites Kaolinite beidellite chemical weathering Eocene geochemical method halloysite ignimbrite Patagonia
spellingShingle	Argentina halloysite iron-bearing smectites Patagonia weathering Clay deposits Iron Weathering Ambient conditions Argentina Halloysite Iron-bearing clays Octahedral sites Patagonia Randomly distributed Smectites Kaolinite beidellite chemical weathering Eocene geochemical method halloysite ignimbrite Patagonia Coexistence of halloysite and iron-bearing clays in an altered ignimbrite, Patagonia, Argentina
topic_facet	Argentina halloysite iron-bearing smectites Patagonia weathering Clay deposits Iron Weathering Ambient conditions Argentina Halloysite Iron-bearing clays Octahedral sites Patagonia Randomly distributed Smectites Kaolinite beidellite chemical weathering Eocene geochemical method halloysite ignimbrite Patagonia
description	The Mamil Choique halloysite deposits of Patagonia, Argentina, contain randomly distributed green clay inclusions and patches within the halloysite mass. Halloysite has been formed from the thorough alteration of rhyolitic to dacitic ash fall tuffs and ignimbrites of the Huitrera Formation, Eocene age, under ambient conditions. The smectites present in the clay inclusions have been determined as ferruginous beidellites with variables amounts of Fe3+ in octahedral sites. The weathering activity that caused the formation of halloysite was also responsible for the genesis of the iron-bearing clay minerals, the formation of which was controlled mainly by permeability. Textural variations within the rock indicate favourable local geochemical environments for the formation of the green clay minerals. © 2014 Mineralogical Society.
title	Coexistence of halloysite and iron-bearing clays in an altered ignimbrite, Patagonia, Argentina
title_short	Coexistence of halloysite and iron-bearing clays in an altered ignimbrite, Patagonia, Argentina
title_full	Coexistence of halloysite and iron-bearing clays in an altered ignimbrite, Patagonia, Argentina
title_fullStr	Coexistence of halloysite and iron-bearing clays in an altered ignimbrite, Patagonia, Argentina
title_full_unstemmed	Coexistence of halloysite and iron-bearing clays in an altered ignimbrite, Patagonia, Argentina
title_sort	coexistence of halloysite and iron-bearing clays in an altered ignimbrite, patagonia, argentina
publishDate	2014
url	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00098558_v49_n3_p429_Cravero http://hdl.handle.net/20.500.12110/paper_00098558_v49_n3_p429_Cravero
_version_	1768543591989248000

Coexistence of halloysite and iron-bearing clays in an altered ignimbrite, Patagonia, Argentina

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