Rock magnetism in modern soils, Buenos Aires Province, Argentina
The influence of climate on the magnetic signal has been investigated assuming it is a first order factor in soil formation. In order to assess the degree of variability of the magnetic signal under different drainage conditions, Mollisols from the Pampean region developed on Pampean loess at varyin...
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| Acceso en línea: | http://hdl.handle.net/20.500.12110/paper_08959811_v26_n2_p217_Orgeira |
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todo:paper_08959811_v26_n2_p217_Orgeira2023-10-03T15:42:48Z Rock magnetism in modern soils, Buenos Aires Province, Argentina Orgeira, M.J. Pereyra, F.X. Vásquez, C. Castañeda, E. Compagnucci, R. Environmental magnetism Mollisols Pampean loess formation mechanism humidity loess magnetite Mollisol reduction Argentina Buenos Aires [Argentina] South America Veronica The influence of climate on the magnetic signal has been investigated assuming it is a first order factor in soil formation. In order to assess the degree of variability of the magnetic signal under different drainage conditions, Mollisols from the Pampean region developed on Pampean loess at varying topographical positions were studied. The sampled sites were located south and north of Buenos Aires in Verónica and Zárate, Pampa Ondulada. The magnetic signal is opposite in the two areas. The generation of superparamagnetic particles (SP) seems to be higher in Zárate. The loss of detrital magnetite could be higher in the less drained soils, in agreement with the hypothesis of loss of detrital magnetite by reductive process. As a simplified interpretation, it is suggested that the differential soil humidity in the studied soils could explain their different magnetic signal. The degree of drainage seems to be the variable that conditions the process of reduction loss. © 2008 Elsevier Ltd. All rights reserved. Fil:Orgeira, M.J. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Pereyra, F.X. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Vásquez, C. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Castañeda, E. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Compagnucci, R. 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_08959811_v26_n2_p217_Orgeira |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Environmental magnetism Mollisols Pampean loess formation mechanism humidity loess magnetite Mollisol reduction Argentina Buenos Aires [Argentina] South America Veronica |
| spellingShingle |
Environmental magnetism Mollisols Pampean loess formation mechanism humidity loess magnetite Mollisol reduction Argentina Buenos Aires [Argentina] South America Veronica Orgeira, M.J. Pereyra, F.X. Vásquez, C. Castañeda, E. Compagnucci, R. Rock magnetism in modern soils, Buenos Aires Province, Argentina |
| topic_facet |
Environmental magnetism Mollisols Pampean loess formation mechanism humidity loess magnetite Mollisol reduction Argentina Buenos Aires [Argentina] South America Veronica |
| description |
The influence of climate on the magnetic signal has been investigated assuming it is a first order factor in soil formation. In order to assess the degree of variability of the magnetic signal under different drainage conditions, Mollisols from the Pampean region developed on Pampean loess at varying topographical positions were studied. The sampled sites were located south and north of Buenos Aires in Verónica and Zárate, Pampa Ondulada. The magnetic signal is opposite in the two areas. The generation of superparamagnetic particles (SP) seems to be higher in Zárate. The loss of detrital magnetite could be higher in the less drained soils, in agreement with the hypothesis of loss of detrital magnetite by reductive process. As a simplified interpretation, it is suggested that the differential soil humidity in the studied soils could explain their different magnetic signal. The degree of drainage seems to be the variable that conditions the process of reduction loss. © 2008 Elsevier Ltd. All rights reserved. |
| format |
JOUR |
| author |
Orgeira, M.J. Pereyra, F.X. Vásquez, C. Castañeda, E. Compagnucci, R. |
| author_facet |
Orgeira, M.J. Pereyra, F.X. Vásquez, C. Castañeda, E. Compagnucci, R. |
| author_sort |
Orgeira, M.J. |
| title |
Rock magnetism in modern soils, Buenos Aires Province, Argentina |
| title_short |
Rock magnetism in modern soils, Buenos Aires Province, Argentina |
| title_full |
Rock magnetism in modern soils, Buenos Aires Province, Argentina |
| title_fullStr |
Rock magnetism in modern soils, Buenos Aires Province, Argentina |
| title_full_unstemmed |
Rock magnetism in modern soils, Buenos Aires Province, Argentina |
| title_sort |
rock magnetism in modern soils, buenos aires province, argentina |
| url |
http://hdl.handle.net/20.500.12110/paper_08959811_v26_n2_p217_Orgeira |
| work_keys_str_mv |
AT orgeiramj rockmagnetisminmodernsoilsbuenosairesprovinceargentina AT pereyrafx rockmagnetisminmodernsoilsbuenosairesprovinceargentina AT vasquezc rockmagnetisminmodernsoilsbuenosairesprovinceargentina AT castanedae rockmagnetisminmodernsoilsbuenosairesprovinceargentina AT compagnuccir rockmagnetisminmodernsoilsbuenosairesprovinceargentina |
| _version_ |
1782029236747370496 |