Rock magnetism in soils of the Pampean plain, Buenos Aires province, Argentina. Linking climate and magnetic behaviour

Results of the study of Argiudolls in two localities (Zárate and Verónica) of the Pampean plain, Argentina, are presented in this contribution. This is a typical area covered by loess. The magnetic studies carried out allowed to determine the presence of detrital magnetite and titanomagnetite, as we...

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Autores principales:	Orgeira, M.J., Vásquez, C.A., Compagnucci, R.H., Raposo, I., Pereyra, F.X.
Formato:	JOUR
Materias:	Argentina Argiudoll Environmental magnetism Pampean plain Soils
Acceso en línea:	http://hdl.handle.net/20.500.12110/paper_10268774_v26_n1_p65_Orgeira
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	todo:paper_10268774_v26_n1_p65_Orgeira
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spelling	todo:paper_10268774_v26_n1_p65_Orgeira2023-10-03T15:56:57Z Rock magnetism in soils of the Pampean plain, Buenos Aires province, Argentina. Linking climate and magnetic behaviour Orgeira, M.J. Vásquez, C.A. Compagnucci, R.H. Raposo, I. Pereyra, F.X. Argentina Argiudoll Environmental magnetism Pampean plain Soils Results of the study of Argiudolls in two localities (Zárate and Verónica) of the Pampean plain, Argentina, are presented in this contribution. This is a typical area covered by loess. The magnetic studies carried out allowed to determine the presence of detrital magnetite and titanomagnetite, as well as maghemite, pedogenic goethite and superparamagnetic particles (SP). In Verónica soils, a depletion of ferromagnetic minerals is recorded. The dominant process in these soils has been the reductive loss of detrital magnetite and titanomagnetite. This is associated with a greater degree of evolution of the soil, which is determined by the concentration and type of detected clays. The higher clay concentration in these soils facilitated reducing conditions and a greater loss of detrital magnetic particles. The loss is reinforced under poor drainage conditions. In the poorly drained soil of Zárate, a concentration of magnetic particles is observed in the Bt horizon, which is associated with an illuviation process. The well drained soil of the same locality shows neoformation of SP particles. These particles would have an ephemeral life until a new wet period in the annual cycle occurs. Although some characteristics of the magnetic signal appear reinforced by the conditions of drainage, this aspect does not seem to be too significant, at least in the Pampean region with low topographic gradients. Fil:Orgeira, M.J. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Vásquez, C.A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Compagnucci, R.H. 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. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_10268774_v26_n1_p65_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	Argentina Argiudoll Environmental magnetism Pampean plain Soils
spellingShingle	Argentina Argiudoll Environmental magnetism Pampean plain Soils Orgeira, M.J. Vásquez, C.A. Compagnucci, R.H. Raposo, I. Pereyra, F.X. Rock magnetism in soils of the Pampean plain, Buenos Aires province, Argentina. Linking climate and magnetic behaviour
topic_facet	Argentina Argiudoll Environmental magnetism Pampean plain Soils
description	Results of the study of Argiudolls in two localities (Zárate and Verónica) of the Pampean plain, Argentina, are presented in this contribution. This is a typical area covered by loess. The magnetic studies carried out allowed to determine the presence of detrital magnetite and titanomagnetite, as well as maghemite, pedogenic goethite and superparamagnetic particles (SP). In Verónica soils, a depletion of ferromagnetic minerals is recorded. The dominant process in these soils has been the reductive loss of detrital magnetite and titanomagnetite. This is associated with a greater degree of evolution of the soil, which is determined by the concentration and type of detected clays. The higher clay concentration in these soils facilitated reducing conditions and a greater loss of detrital magnetic particles. The loss is reinforced under poor drainage conditions. In the poorly drained soil of Zárate, a concentration of magnetic particles is observed in the Bt horizon, which is associated with an illuviation process. The well drained soil of the same locality shows neoformation of SP particles. These particles would have an ephemeral life until a new wet period in the annual cycle occurs. Although some characteristics of the magnetic signal appear reinforced by the conditions of drainage, this aspect does not seem to be too significant, at least in the Pampean region with low topographic gradients.
format	JOUR
author	Orgeira, M.J. Vásquez, C.A. Compagnucci, R.H. Raposo, I. Pereyra, F.X.
author_facet	Orgeira, M.J. Vásquez, C.A. Compagnucci, R.H. Raposo, I. Pereyra, F.X.
author_sort	Orgeira, M.J.
title	Rock magnetism in soils of the Pampean plain, Buenos Aires province, Argentina. Linking climate and magnetic behaviour
title_short	Rock magnetism in soils of the Pampean plain, Buenos Aires province, Argentina. Linking climate and magnetic behaviour
title_full	Rock magnetism in soils of the Pampean plain, Buenos Aires province, Argentina. Linking climate and magnetic behaviour
title_fullStr	Rock magnetism in soils of the Pampean plain, Buenos Aires province, Argentina. Linking climate and magnetic behaviour
title_full_unstemmed	Rock magnetism in soils of the Pampean plain, Buenos Aires province, Argentina. Linking climate and magnetic behaviour
title_sort	rock magnetism in soils of the pampean plain, buenos aires province, argentina. linking climate and magnetic behaviour
url	http://hdl.handle.net/20.500.12110/paper_10268774_v26_n1_p65_Orgeira
work_keys_str_mv	AT orgeiramj rockmagnetisminsoilsofthepampeanplainbuenosairesprovinceargentinalinkingclimateandmagneticbehaviour AT vasquezca rockmagnetisminsoilsofthepampeanplainbuenosairesprovinceargentinalinkingclimateandmagneticbehaviour AT compagnuccirh rockmagnetisminsoilsofthepampeanplainbuenosairesprovinceargentinalinkingclimateandmagneticbehaviour AT raposoi rockmagnetisminsoilsofthepampeanplainbuenosairesprovinceargentinalinkingclimateandmagneticbehaviour AT pereyrafx rockmagnetisminsoilsofthepampeanplainbuenosairesprovinceargentinalinkingclimateandmagneticbehaviour
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Rock magnetism in soils of the Pampean plain, Buenos Aires province, Argentina. Linking climate and magnetic behaviour

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