Degrees of pyritization in the Gulf of Mexico in sediments influenced by the Coatzacoalcos and the Grijava-Usumacinta rivers

Degrees of pyritization in the Gulf of Mexico in sediments influenced by the Coatzacoalcos and the Grijava-Usumacinta rivers

Degrees of pyritization (DOP) were measured by three different methods in four cores collected in the Gulf of Mexico, close to the outlet of the Coatzacoalcos and Grijalva-Usumacinta rivers. The extractants used for measuring labile Fe, necessary for the calculation of DOP values, were HCl 1N, dithi...

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Autores principales: Ortiz-Zamora, G, Huerta-Díaz, MA, Salas-de-León, DA, Monreal-Gómez, MA
Formato: Online
Lenguaje:eng
Publicado: Iniversidad Autónoma de Baja California 2002
Acceso en línea:https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/238
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spelling oai:cienciasmarinas.com.mx:article-2382019-04-29T22:17:05Z Degrees of pyritization in the Gulf of Mexico in sediments influenced by the Coatzacoalcos and the Grijava-Usumacinta rivers Grados de piritización en el Golfo de México en sedimentos influidos por los ríos Coatzacoalcos y Grijalva-Usumacinta Ortiz-Zamora, G Huerta-Díaz, MA Salas-de-León, DA Monreal-Gómez, MA degrees of pyritization Coatzacoalcos River Grijalva-Usumacinta River Gulf of Mexico sediments grados de piritización Río Coatzacoalcos Río Grijalva-Usumacinta Golfo de México sedimentos Degrees of pyritization (DOP) were measured by three different methods in four cores collected in the Gulf of Mexico, close to the outlet of the Coatzacoalcos and Grijalva-Usumacinta rivers. The extractants used for measuring labile Fe, necessary for the calculation of DOP values, were HCl 1N, dithionite and oxalate, with the first two ones being equivalent for measuring DOP, at least in this type of sediments. The data obtained in this work suggest that in deltaic sediments it is possible to find DOP values higher than those measured in the continental shelf of the Gulf of Mexico, with the sediments closer to the outlets of the Coatzacoalcos and Grijalva-Usumacinta rivers showing values that are even higher than those measured in the Mississippi River delta. Se midieron grados de piritización (DOP) por tres diferentes métodos en cuatro núcleos recolectados en el Golfo de México, cerca de la desembocadura de los ríos Coatzacoalcos y Grijalva-Usumacinta. Los extractantes utilizados para la medición del Fe lábil necesario para los cálculos de DOP fueron HCl 1N, ditionita y oxalato, quedando demostrado que los dos primeros son equivalentes para medir DOP, al menos en este tipo de sedimentos. Los datos obtenidos en este trabajo sugieren que en los sedimentos deltáicos se pueden encontrar valores de DOP superiores a los medidos en la plataforma continental del Golfo de México. En especial, los sedimentos cercanos a las desembocaduras de los ríos Coatzacoalcos y Grijalva-Usumacinta muestran valores superiores incluso a los medidos en el delta del Río Mississippi. Iniversidad Autónoma de Baja California 2002-03-06 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article Artículo Arbitrado application/pdf https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/238 10.7773/cm.v28i4.238 Ciencias Marinas; Vol. 28 No. 4 (2002); 369-379 Ciencias Marinas; Vol. 28 Núm. 4 (2002); 369-379 2395-9053 0185-3880 eng https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/238/201
institution Ciencias Marinas
collection OJS
language eng
format Online
author Ortiz-Zamora, G
Huerta-Díaz, MA
Salas-de-León, DA
Monreal-Gómez, MA
spellingShingle Ortiz-Zamora, G
Huerta-Díaz, MA
Salas-de-León, DA
Monreal-Gómez, MA
Degrees of pyritization in the Gulf of Mexico in sediments influenced by the Coatzacoalcos and the Grijava-Usumacinta rivers
author_facet Ortiz-Zamora, G
Huerta-Díaz, MA
Salas-de-León, DA
Monreal-Gómez, MA
author_sort Ortiz-Zamora, G
title Degrees of pyritization in the Gulf of Mexico in sediments influenced by the Coatzacoalcos and the Grijava-Usumacinta rivers
title_short Degrees of pyritization in the Gulf of Mexico in sediments influenced by the Coatzacoalcos and the Grijava-Usumacinta rivers
title_full Degrees of pyritization in the Gulf of Mexico in sediments influenced by the Coatzacoalcos and the Grijava-Usumacinta rivers
title_fullStr Degrees of pyritization in the Gulf of Mexico in sediments influenced by the Coatzacoalcos and the Grijava-Usumacinta rivers
title_full_unstemmed Degrees of pyritization in the Gulf of Mexico in sediments influenced by the Coatzacoalcos and the Grijava-Usumacinta rivers
title_sort degrees of pyritization in the gulf of mexico in sediments influenced by the coatzacoalcos and the grijava-usumacinta rivers
description Degrees of pyritization (DOP) were measured by three different methods in four cores collected in the Gulf of Mexico, close to the outlet of the Coatzacoalcos and Grijalva-Usumacinta rivers. The extractants used for measuring labile Fe, necessary for the calculation of DOP values, were HCl 1N, dithionite and oxalate, with the first two ones being equivalent for measuring DOP, at least in this type of sediments. The data obtained in this work suggest that in deltaic sediments it is possible to find DOP values higher than those measured in the continental shelf of the Gulf of Mexico, with the sediments closer to the outlets of the Coatzacoalcos and Grijalva-Usumacinta rivers showing values that are even higher than those measured in the Mississippi River delta.
publisher Iniversidad Autónoma de Baja California
publishDate 2002
url https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/238
_version_ 1715723945730113536

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