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

Records from magnetic signals in Buenos Aires loess-paleosol sequences have been published, but their relationship with environmental changes has been difficult to establish. Studies on the superparamagnetic (SP) population in present soils can help to understand these processes. Samples from presen...

Descripción completa

Guardado en:
Detalles Bibliográficos
Autores principales: Vasquez, C.A., Orgeira, M.J., Sinito, A.M.
Formato: JOUR
Materias:
Argiudolls
Lognormal distribution
Low temperatures
Magnetization
Superparamagnetism
Susceptibility
Verwey
Codes (symbols)
Ferrimagnetism
Magnetic susceptibility
Sediments
Soils
Environmental change
Ferrimagnetic minerals
Linear correlation
Log-normal distribution
Superparamagnetic particles
loess
low temperature
magnetic method
magnetization
paleosol
pH
Argentina
Buenos Aires [Argentina]
South America
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_09430105_v56_n8_p1653_Vasquez
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_09430105_v56_n8_p1653_Vasquez
record_format dspace
spelling todo:paper_09430105_v56_n8_p1653_Vasquez2023-10-03T15:49:03Z Origin of superparamagnetic particles in Argiudolls developed on loess, Buenos Aires (Argentina) Vasquez, C.A. Orgeira, M.J. Sinito, A.M. Argiudolls Lognormal distribution Low temperatures Magnetization Superparamagnetism Susceptibility Verwey Codes (symbols) Ferrimagnetism Magnetic susceptibility Magnetization Sediments Soils Argiudolls Environmental change Ferrimagnetic minerals Linear correlation Log-normal distribution Low temperatures Superparamagnetic particles Verwey Superparamagnetism loess low temperature magnetic method magnetization paleosol pH Argentina Buenos Aires [Argentina] South America Records from magnetic signals in Buenos Aires loess-paleosol sequences have been published, but their relationship with environmental changes has been difficult to 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 superparamagnetic particles, the median diameter near 15 nm. The presence of detritic pseudosingledomain (PSD) titanomagnetite, with low titanium content ranging between TM 28 and TM40, has been established. The linear correlation of 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 an inorganic process in adequate environmental pH and Eh of the soils. © 2008 Springer-Verlag. Fil:Vasquez, C.A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Orgeira, M.J. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Sinito, A.M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_09430105_v56_n8_p1653_Vasquez
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Argiudolls
Lognormal distribution
Low temperatures
Magnetization
Superparamagnetism
Susceptibility
Verwey
Codes (symbols)
Ferrimagnetism
Magnetic susceptibility
Magnetization
Sediments
Soils
Argiudolls
Environmental change
Ferrimagnetic minerals
Linear correlation
Log-normal distribution
Low temperatures
Superparamagnetic particles
Verwey
Superparamagnetism
loess
low temperature
magnetic method
magnetization
paleosol
pH
Argentina
Buenos Aires [Argentina]
South America
spellingShingle Argiudolls
Lognormal distribution
Low temperatures
Magnetization
Superparamagnetism
Susceptibility
Verwey
Codes (symbols)
Ferrimagnetism
Magnetic susceptibility
Magnetization
Sediments
Soils
Argiudolls
Environmental change
Ferrimagnetic minerals
Linear correlation
Log-normal distribution
Low temperatures
Superparamagnetic particles
Verwey
Superparamagnetism
loess
low temperature
magnetic method
magnetization
paleosol
pH
Argentina
Buenos Aires [Argentina]
South America
Vasquez, C.A.
Orgeira, M.J.
Sinito, A.M.
Origin of superparamagnetic particles in Argiudolls developed on loess, Buenos Aires (Argentina)
topic_facet Argiudolls
Lognormal distribution
Low temperatures
Magnetization
Superparamagnetism
Susceptibility
Verwey
Codes (symbols)
Ferrimagnetism
Magnetic susceptibility
Magnetization
Sediments
Soils
Argiudolls
Environmental change
Ferrimagnetic minerals
Linear correlation
Log-normal distribution
Low temperatures
Superparamagnetic particles
Verwey
Superparamagnetism
loess
low temperature
magnetic method
magnetization
paleosol
pH
Argentina
Buenos Aires [Argentina]
South America
description Records from magnetic signals in Buenos Aires loess-paleosol sequences have been published, but their relationship with environmental changes has been difficult to 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 superparamagnetic particles, the median diameter near 15 nm. The presence of detritic pseudosingledomain (PSD) titanomagnetite, with low titanium content ranging between TM 28 and TM40, has been established. The linear correlation of 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 an inorganic process in adequate environmental pH and Eh of the soils. © 2008 Springer-Verlag.
format JOUR
author Vasquez, C.A.
Orgeira, M.J.
Sinito, A.M.
author_facet Vasquez, C.A.
Orgeira, M.J.
Sinito, A.M.
author_sort Vasquez, C.A.
title Origin of superparamagnetic particles in Argiudolls developed on loess, Buenos Aires (Argentina)
title_short Origin of superparamagnetic particles in Argiudolls developed on loess, Buenos Aires (Argentina)
title_full Origin of superparamagnetic particles in Argiudolls developed on loess, Buenos Aires (Argentina)
title_fullStr Origin of superparamagnetic particles in Argiudolls developed on loess, Buenos Aires (Argentina)
title_full_unstemmed Origin of superparamagnetic particles in Argiudolls developed on loess, Buenos Aires (Argentina)
title_sort origin of superparamagnetic particles in argiudolls developed on loess, buenos aires (argentina)
url http://hdl.handle.net/20.500.12110/paper_09430105_v56_n8_p1653_Vasquez
work_keys_str_mv AT vasquezca originofsuperparamagneticparticlesinargiudollsdevelopedonloessbuenosairesargentina
AT orgeiramj originofsuperparamagneticparticlesinargiudollsdevelopedonloessbuenosairesargentina
AT sinitoam originofsuperparamagneticparticlesinargiudollsdevelopedonloessbuenosairesargentina
_version_ 1807319247812034560

Ejemplares similares