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Artículo

Origin of superparamagnetic particles in Argiudolls developed on loess, Buenos Aires (Argentina)

Vasquez, Carlos AlbertoIcon ; Orgeira, Maria JuliaIcon ; Sinito, Ana MariaIcon
Fecha de publicación: 03/2008
Editorial: Springer
Revista: Environmental Geology
ISSN: 0943-0105
Idioma: Inglés
Tipo de recurso: Artículo publicado
Clasificación temática:
Geoquímica y Geofísica

Resumen

Records from magnetic signals in Buenos Aires loess?paleosol sequences have been published, but their relationship with environmental changes has been difficultto establish. Studies on the superparamagnetic (SP) population in present soils can help to understand these processes. Samples from present soils (Argiudolls) and a paleosol from the Buenos Aires Province (Argentina) were analyzed using low and room temperature magnetic measurements. They show that it is possible to support the hypothesis of a lognormal distribution of superparamagneticparticles, the median diameter near 15 nm. The presence of detritic pseudosingledomain (PSD) titanomagnetite, with low titanium content ranging between TM28 and TM40, has been established. The linear correlationof SP content with ferrimagnetic susceptibility and with magnetization suggests that ferrimagnetic minerals drive the SP generation. Finally, it can be concluded that SP magnetic grains, in the Pampean plain, are generated by aninorganic process in adequate environmental pH and Eh of the soils.
Palabras clave: SUPERPARAMAGNETIC , Susceptibility , Magnetization , Verwey , Low temperatures , Lognormal distribution , Argiudolls
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info:eu-repo/semantics/restrictedAccess Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Creative Commons Attribution-NonCommercial-ShareAlike 2.5 Unported (CC BY-NC-SA 2.5)
Identificadores
URI: http://hdl.handle.net/11336/239965
URL: https://link.springer.com/article/10.1007/s00254-008-1262-8
DOI: http://dx.doi.org/10.1007/s00254-008-1262-8
Colecciones
Articulos(CCT - TANDIL)
Articulos de CTRO CIENTIFICO TECNOLOGICO CONICET - TANDIL
Articulos(IGEBA)
Articulos de INSTITUTO DE GEOCIENCIAS BASICAS, APLICADAS Y AMBIENTALES DE BS. AS
Citación
Vasquez, Carlos Alberto; Orgeira, Maria Julia; Sinito, Ana Maria; Origin of superparamagnetic particles in Argiudolls developed on loess, Buenos Aires (Argentina); Springer; Environmental Geology; 56; 8; 3-2008; 1653-1661
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