Biochemistry of iron associated with pyritization in Holocene marshes, Mar Chiquita, Buenos Aires, Argentina
- Autores
- Osterrieth, Margarita; Borrelli, Natalia L.; Álvarez, María Fernanda; Nóbrega, G. N.; Machado, W.; Ferreira, T.
- Año de publicación
- 2016
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- In salt marshes, the hydrodynamics and the availability of iron, organic matter and sulphate, influence the formation and/or dissolution of iron sulfides and iron oxyhydroxides. Therefore, they constitute key factors affecting the iron biogeochemical processes in these environments. The aim of this work is to evaluate the physicochemical and mineralogical variations associated to iron biogeochemistry in palaeo and actual salt marshes in the area of influence of the Mar Chiquita coastal lagoon, Pampean Plain, Argentina. In soils of exhumed palaeo marshes, the iron contents are 56–95 lmol g-1, whereas these contents decrease to 36–75 lmol g-1 in actual marsh soils. The presence of framboidal and poliframboidal pyrites associated with gypsum, barite, calcite, halite and iron oxyhydroxides defines the conditions of the pedosedimentary sequences of the Holocene paleomarshes. Sequences of pyrite formation (sulfidization) and degradation (sulfuricization) were observed. These processes were evidenced by a sequential extraction, reflecting that the largest proportion of iron is in the form of crystalline iron oxides (28–76 %) and lepidocrocite (6–16 %); while the proportion associated with ferrihydrite and pyrite is low (0–9 and 1–17 %, respectively). These facts could be partly explained by the complex redox processes characteristic of these environments, such as aeration generated by the rhizosphere and intense bioturbation by invertebrates. These iron biomineralizations have been useful because they allow paleoenvironmental interpretations and characterization of paleomarshes, and environmental inferences related to the management of actual salt marshes.
- Materia
-
Geología
Biomineralization
Framboidal and poliframboidal pyrites
Sequential extraction
Coastal wetlands - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- http://creativecommons.org/licenses/by-nc-sa/4.0/
- Repositorio
- Institución
- Comisión de Investigaciones Científicas de la Provincia de Buenos Aires
- OAI Identificador
- oai:digital.cic.gba.gob.ar:11746/6368
Ver los metadatos del registro completo
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Biochemistry of iron associated with pyritization in Holocene marshes, Mar Chiquita, Buenos Aires, ArgentinaOsterrieth, MargaritaBorrelli, Natalia L.Álvarez, María FernandaNóbrega, G. N.Machado, W.Ferreira, T.GeologíaBiomineralizationFramboidal and poliframboidal pyritesSequential extractionCoastal wetlandsIn salt marshes, the hydrodynamics and the availability of iron, organic matter and sulphate, influence the formation and/or dissolution of iron sulfides and iron oxyhydroxides. Therefore, they constitute key factors affecting the iron biogeochemical processes in these environments. The aim of this work is to evaluate the physicochemical and mineralogical variations associated to iron biogeochemistry in palaeo and actual salt marshes in the area of influence of the Mar Chiquita coastal lagoon, Pampean Plain, Argentina. In soils of exhumed palaeo marshes, the iron contents are 56–95 lmol g-1, whereas these contents decrease to 36–75 lmol g-1 in actual marsh soils. The presence of framboidal and poliframboidal pyrites associated with gypsum, barite, calcite, halite and iron oxyhydroxides defines the conditions of the pedosedimentary sequences of the Holocene paleomarshes. Sequences of pyrite formation (sulfidization) and degradation (sulfuricization) were observed. These processes were evidenced by a sequential extraction, reflecting that the largest proportion of iron is in the form of crystalline iron oxides (28–76 %) and lepidocrocite (6–16 %); while the proportion associated with ferrihydrite and pyrite is low (0–9 and 1–17 %, respectively). These facts could be partly explained by the complex redox processes characteristic of these environments, such as aeration generated by the rhizosphere and intense bioturbation by invertebrates. These iron biomineralizations have been useful because they allow paleoenvironmental interpretations and characterization of paleomarshes, and environmental inferences related to the management of actual salt marshes.Springer Berlin Heidelberg2016-04-11info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfhttps://digital.cic.gba.gob.ar/handle/11746/6368enginfo:eu-repo/semantics/altIdentifier/doi/10.1007/s12665-016-5506-8info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-sa/4.0/reponame:CIC Digital (CICBA)instname:Comisión de Investigaciones Científicas de la Provincia de Buenos Airesinstacron:CICBA2025-09-29T13:40:14Zoai:digital.cic.gba.gob.ar:11746/6368Institucionalhttp://digital.cic.gba.gob.arOrganismo científico-tecnológicoNo correspondehttp://digital.cic.gba.gob.ar/oai/snrdmarisa.degiusti@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:94412025-09-29 13:40:14.684CIC Digital (CICBA) - Comisión de Investigaciones Científicas de la Provincia de Buenos Airesfalse |
dc.title.none.fl_str_mv |
Biochemistry of iron associated with pyritization in Holocene marshes, Mar Chiquita, Buenos Aires, Argentina |
title |
Biochemistry of iron associated with pyritization in Holocene marshes, Mar Chiquita, Buenos Aires, Argentina |
spellingShingle |
Biochemistry of iron associated with pyritization in Holocene marshes, Mar Chiquita, Buenos Aires, Argentina Osterrieth, Margarita Geología Biomineralization Framboidal and poliframboidal pyrites Sequential extraction Coastal wetlands |
title_short |
Biochemistry of iron associated with pyritization in Holocene marshes, Mar Chiquita, Buenos Aires, Argentina |
title_full |
Biochemistry of iron associated with pyritization in Holocene marshes, Mar Chiquita, Buenos Aires, Argentina |
title_fullStr |
Biochemistry of iron associated with pyritization in Holocene marshes, Mar Chiquita, Buenos Aires, Argentina |
title_full_unstemmed |
Biochemistry of iron associated with pyritization in Holocene marshes, Mar Chiquita, Buenos Aires, Argentina |
title_sort |
Biochemistry of iron associated with pyritization in Holocene marshes, Mar Chiquita, Buenos Aires, Argentina |
dc.creator.none.fl_str_mv |
Osterrieth, Margarita Borrelli, Natalia L. Álvarez, María Fernanda Nóbrega, G. N. Machado, W. Ferreira, T. |
author |
Osterrieth, Margarita |
author_facet |
Osterrieth, Margarita Borrelli, Natalia L. Álvarez, María Fernanda Nóbrega, G. N. Machado, W. Ferreira, T. |
author_role |
author |
author2 |
Borrelli, Natalia L. Álvarez, María Fernanda Nóbrega, G. N. Machado, W. Ferreira, T. |
author2_role |
author author author author author |
dc.subject.none.fl_str_mv |
Geología Biomineralization Framboidal and poliframboidal pyrites Sequential extraction Coastal wetlands |
topic |
Geología Biomineralization Framboidal and poliframboidal pyrites Sequential extraction Coastal wetlands |
dc.description.none.fl_txt_mv |
In salt marshes, the hydrodynamics and the availability of iron, organic matter and sulphate, influence the formation and/or dissolution of iron sulfides and iron oxyhydroxides. Therefore, they constitute key factors affecting the iron biogeochemical processes in these environments. The aim of this work is to evaluate the physicochemical and mineralogical variations associated to iron biogeochemistry in palaeo and actual salt marshes in the area of influence of the Mar Chiquita coastal lagoon, Pampean Plain, Argentina. In soils of exhumed palaeo marshes, the iron contents are 56–95 lmol g-1, whereas these contents decrease to 36–75 lmol g-1 in actual marsh soils. The presence of framboidal and poliframboidal pyrites associated with gypsum, barite, calcite, halite and iron oxyhydroxides defines the conditions of the pedosedimentary sequences of the Holocene paleomarshes. Sequences of pyrite formation (sulfidization) and degradation (sulfuricization) were observed. These processes were evidenced by a sequential extraction, reflecting that the largest proportion of iron is in the form of crystalline iron oxides (28–76 %) and lepidocrocite (6–16 %); while the proportion associated with ferrihydrite and pyrite is low (0–9 and 1–17 %, respectively). These facts could be partly explained by the complex redox processes characteristic of these environments, such as aeration generated by the rhizosphere and intense bioturbation by invertebrates. These iron biomineralizations have been useful because they allow paleoenvironmental interpretations and characterization of paleomarshes, and environmental inferences related to the management of actual salt marshes. |
description |
In salt marshes, the hydrodynamics and the availability of iron, organic matter and sulphate, influence the formation and/or dissolution of iron sulfides and iron oxyhydroxides. Therefore, they constitute key factors affecting the iron biogeochemical processes in these environments. The aim of this work is to evaluate the physicochemical and mineralogical variations associated to iron biogeochemistry in palaeo and actual salt marshes in the area of influence of the Mar Chiquita coastal lagoon, Pampean Plain, Argentina. In soils of exhumed palaeo marshes, the iron contents are 56–95 lmol g-1, whereas these contents decrease to 36–75 lmol g-1 in actual marsh soils. The presence of framboidal and poliframboidal pyrites associated with gypsum, barite, calcite, halite and iron oxyhydroxides defines the conditions of the pedosedimentary sequences of the Holocene paleomarshes. Sequences of pyrite formation (sulfidization) and degradation (sulfuricization) were observed. These processes were evidenced by a sequential extraction, reflecting that the largest proportion of iron is in the form of crystalline iron oxides (28–76 %) and lepidocrocite (6–16 %); while the proportion associated with ferrihydrite and pyrite is low (0–9 and 1–17 %, respectively). These facts could be partly explained by the complex redox processes characteristic of these environments, such as aeration generated by the rhizosphere and intense bioturbation by invertebrates. These iron biomineralizations have been useful because they allow paleoenvironmental interpretations and characterization of paleomarshes, and environmental inferences related to the management of actual salt marshes. |
publishDate |
2016 |
dc.date.none.fl_str_mv |
2016-04-11 |
dc.type.none.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion http://purl.org/coar/resource_type/c_6501 info:ar-repo/semantics/articulo |
format |
article |
status_str |
publishedVersion |
dc.identifier.none.fl_str_mv |
https://digital.cic.gba.gob.ar/handle/11746/6368 |
url |
https://digital.cic.gba.gob.ar/handle/11746/6368 |
dc.language.none.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
info:eu-repo/semantics/altIdentifier/doi/10.1007/s12665-016-5506-8 |
dc.rights.none.fl_str_mv |
info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by-nc-sa/4.0/ |
eu_rights_str_mv |
openAccess |
rights_invalid_str_mv |
http://creativecommons.org/licenses/by-nc-sa/4.0/ |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Springer Berlin Heidelberg |
publisher.none.fl_str_mv |
Springer Berlin Heidelberg |
dc.source.none.fl_str_mv |
reponame:CIC Digital (CICBA) instname:Comisión de Investigaciones Científicas de la Provincia de Buenos Aires instacron:CICBA |
reponame_str |
CIC Digital (CICBA) |
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CIC Digital (CICBA) |
instname_str |
Comisión de Investigaciones Científicas de la Provincia de Buenos Aires |
instacron_str |
CICBA |
institution |
CICBA |
repository.name.fl_str_mv |
CIC Digital (CICBA) - Comisión de Investigaciones Científicas de la Provincia de Buenos Aires |
repository.mail.fl_str_mv |
marisa.degiusti@sedici.unlp.edu.ar |
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13.070432 |