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Abstract:

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.

Registro:

Documento: Artículo
Título:Coexistence of halloysite and iron-bearing clays in an altered ignimbrite, Patagonia, Argentina
Autor:Cravero, F.; Marfil, S.A.; Ramos, C.P.; Maiza, P.
Filiación:Instituto de Geocronología y Geología Isotópica, CONICET-UBA, Ciudad Universitaria, Argentina
CONICET, Av.Rivadavia 1917, BuenosAires, Argentina
Department of Geology, Universidad Nacional Del sur, San Juan 670,Bahía Blanca, Argentina
CICof the Province of Buenos Aires, Street N 526 between 10 and 11, La Plata, Argentina
Departamento de Física de la MateriaCondensada, GIyA-CAC-CNEA, Av.Gral. Paz 1499 (1650), San-Martín, Buenos Aires, Argentina
Palabras clave: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
Año:2014
Volumen:49
Número:3
Página de inicio:429
Página de fin:441
DOI: http://dx.doi.org/10.1180/claymin.2014.049.3.06
Título revista:Clay Minerals
Título revista abreviado:Clay Miner.
ISSN:00098558
CODEN:CLMIA
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00098558_v49_n3_p429_Cravero

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Citas:

---------- APA ----------
Cravero, F., Marfil, S.A., Ramos, C.P. & Maiza, P. (2014) . Coexistence of halloysite and iron-bearing clays in an altered ignimbrite, Patagonia, Argentina. Clay Minerals, 49(3), 429-441.
http://dx.doi.org/10.1180/claymin.2014.049.3.06
---------- CHICAGO ----------
Cravero, F., Marfil, S.A., Ramos, C.P., Maiza, P. "Coexistence of halloysite and iron-bearing clays in an altered ignimbrite, Patagonia, Argentina" . Clay Minerals 49, no. 3 (2014) : 429-441.
http://dx.doi.org/10.1180/claymin.2014.049.3.06
---------- MLA ----------
Cravero, F., Marfil, S.A., Ramos, C.P., Maiza, P. "Coexistence of halloysite and iron-bearing clays in an altered ignimbrite, Patagonia, Argentina" . Clay Minerals, vol. 49, no. 3, 2014, pp. 429-441.
http://dx.doi.org/10.1180/claymin.2014.049.3.06
---------- VANCOUVER ----------
Cravero, F., Marfil, S.A., Ramos, C.P., Maiza, P. Coexistence of halloysite and iron-bearing clays in an altered ignimbrite, Patagonia, Argentina. Clay Miner. 2014;49(3):429-441.
http://dx.doi.org/10.1180/claymin.2014.049.3.06