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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| Formato: | JOUR |
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| Acceso en línea: | http://hdl.handle.net/20.500.12110/paper_00098558_v49_n3_p429_Cravero |
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todo:paper_00098558_v49_n3_p429_Cravero2023-10-03T14:08:42Z Coexistence of halloysite and iron-bearing clays in an altered ignimbrite, Patagonia, Argentina Cravero, F. Marfil, S.A. Ramos, C.P. Maiza, P. 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. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00098558_v49_n3_p429_Cravero |
| institution |
Universidad de Buenos Aires |
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I-28 |
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R-134 |
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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 Cravero, F. Marfil, S.A. Ramos, C.P. Maiza, P. 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. |
| format |
JOUR |
| author |
Cravero, F. Marfil, S.A. Ramos, C.P. Maiza, P. |
| author_facet |
Cravero, F. Marfil, S.A. Ramos, C.P. Maiza, P. |
| author_sort |
Cravero, F. |
| 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 |
| url |
http://hdl.handle.net/20.500.12110/paper_00098558_v49_n3_p429_Cravero |
| work_keys_str_mv |
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