dor_id: 4122939

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650.#.4.x: Físico Matemáticas y Ciencias de la Tierra

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336.#.#.a: Artículo

351.#.#.6: http://rmcg.geociencias.unam.mx/index.php/rmcg/index

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850.#.#.a: Universidad Nacional Autónoma de México

856.4.0.u: http://rmcg.geociencias.unam.mx/index.php/rmcg/article/view/1007/839

100.1.#.a: Hernández-silva, Gilberto; Solorio-munguía, Gregorio; Vasallo-morales, Luis; Flores-delgadillo, Lourdes; Maples-vermeersch, Mireya; Hernández-santiago, Daniel; Alcalá-martínez, René

524.#.#.a: Hernández-silva, Gilberto, et al. (2000). Dispersión de Ni y Cr en sedimentos y suelos superficiales derivados de piroxenitas, serpentinitas y basaltos de la cuenca San Juan de Otates, Estado de Guanajuato, México. Revista Mexicana de Ciencias Geológicas; Vol 17 No 2, 2000; 125-136. Recuperado de https://repositorio.unam.mx/contenidos/4122939

245.1.0.a: Dispersión de Ni y Cr en sedimentos y suelos superficiales derivados de piroxenitas, serpentinitas y basaltos de la cuenca San Juan de Otates, Estado de Guanajuato, México

502.#.#.c: Universidad Nacional Autónoma de México

561.1.#.a: Instituto de Geología, UNAM

264.#.0.c: 2000

264.#.1.c: 2018-07-05

506.1.#.a: La titularidad de los derechos patrimoniales de esta obra pertenece a las instituciones editoras. Su uso se rige por una licencia Creative Commons BY-NC-ND 4.0 Internacional, https://creativecommons.org/licenses/by-nc-nd/4.0/legalcode.es, para un uso diferente consultar al responsable jurídico del repositorio por medio del correo electrónico rmcg@geociencias.unam.mx

884.#.#.k: http://rmcg.geociencias.unam.mx/index.php/rmcg/article/view/1007

001.#.#.#: 113.oai:ojs.rmcg.geociencias.unam.mx:article/1007

041.#.7.h: spa

520.3.#.a: The particular aim of this work is to determine within the hydrologic San Juan de Otates system, State of Guanajuato, Mexico, the dispersion characteristics of total Ni and Cr in sediments and surficial soils derived from ultramaphic rocks, and also to confirm if there is dispersion of these elements towards neighboring subbasin. Usually both of these elements are found in nature associated to piroxenites, serpentinites and basalts, rocks which are all found in the upper part of the basin. For the sake of analysis the area under study was divided into five subbasins. In order to determine the concentration levels of these elements 56 sediment sites and 46 soil sites were chosen at a depth of 0-20 cm; the sampling sites were selected considering geology, geoform, slope, drenage, soil unities, land use, and civil engineering works. In order to stablish the association existing between mineralogy and metalic ions the macroscopy technique was used. The samples were digested in a microwave oven, utilizing aqua regia as extractant. Concentrations were determined by atomic absorption flame spectrophotometry, with detection limits of 0.004 mg/kg-1for Ni and 0.002 mg/kg-1 for Cr. The ILWIS geographical information system was used for mapping the distribution of metalic ions. The statistical analysis did not show significant differences in the mean Ni and Cr contents both in soils and sediments. The grater Cr levels were found in the San Juan de Otates subbasin, while Ni showed a greater concentration in three subbasins in comparison with the rest of the area. The multivariate analysis pointed out that the two variables used (Ni and Cr) were not sufficient to make a proper choice of sampling sites in the different subbasins. According to mean world wide range reported for Ni and Cr, there are areas with natural contents higher than the ones found in San Juan de Otates basin. The Ni and Cr dispersion from its source point, shows geographical irregularity. In El Bajío, the channel of Santa Ana del Conde, which joins the arroyos of San Juan de Otates and El Juache, has lately increased the contents of the elements studied. Finally, the maps of Ni and Cr show, with respect to superficial soils and sediments, that there does not exist dispersion of these elements towards neighboring subbasins.

773.1.#.t: Revista Mexicana de Ciencias Geológicas; Vol 17 No 2 (2000); 125-136

773.1.#.o: http://rmcg.geociencias.unam.mx/index.php/rmcg/index

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300.#.#.a: Páginas: 125-136

264.#.1.b: Instituto de Geología, UNAM

handle: 604ff93f16567fc5

harvesting_date: 2023-08-23 17:00:00.0

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file_creation_date: 2005-03-01 14:24:50.0

file_modification_date: 2005-03-01 20:26:41.0

file_creator: Sara Solis

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245.1.0.b: Dispersión de Ni y Cr en sedimentos y suelos superficiales derivados de piroxenitas, serpentinitas y basaltos de la cuenca San Juan de Otates, Estado de Guanajuato, México

last_modified: 2023-08-23 17:00:00

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Artículo

Dispersión de Ni y Cr en sedimentos y suelos superficiales derivados de piroxenitas, serpentinitas y basaltos de la cuenca San Juan de Otates, Estado de Guanajuato, México

Hernández-silva, Gilberto; Solorio-munguía, Gregorio; Vasallo-morales, Luis; Flores-delgadillo, Lourdes; Maples-vermeersch, Mireya; Hernández-santiago, Daniel; Alcalá-martínez, René

Instituto de Geología, UNAM, publicado en Revista Mexicana de Ciencias Geológicas, y cosechado de Revistas UNAM

Licencia de uso

Procedencia del contenido

Cita

Hernández-silva, Gilberto, et al. (2000). Dispersión de Ni y Cr en sedimentos y suelos superficiales derivados de piroxenitas, serpentinitas y basaltos de la cuenca San Juan de Otates, Estado de Guanajuato, México. Revista Mexicana de Ciencias Geológicas; Vol 17 No 2, 2000; 125-136. Recuperado de https://repositorio.unam.mx/contenidos/4122939

Descripción del recurso

Autor(es)
Hernández-silva, Gilberto; Solorio-munguía, Gregorio; Vasallo-morales, Luis; Flores-delgadillo, Lourdes; Maples-vermeersch, Mireya; Hernández-santiago, Daniel; Alcalá-martínez, René
Tipo
Artículo de Investigación
Área del conocimiento
Físico Matemáticas y Ciencias de la Tierra
Título
Dispersión de Ni y Cr en sedimentos y suelos superficiales derivados de piroxenitas, serpentinitas y basaltos de la cuenca San Juan de Otates, Estado de Guanajuato, México
Fecha
2018-07-05
Resumen
The particular aim of this work is to determine within the hydrologic San Juan de Otates system, State of Guanajuato, Mexico, the dispersion characteristics of total Ni and Cr in sediments and surficial soils derived from ultramaphic rocks, and also to confirm if there is dispersion of these elements towards neighboring subbasin. Usually both of these elements are found in nature associated to piroxenites, serpentinites and basalts, rocks which are all found in the upper part of the basin. For the sake of analysis the area under study was divided into five subbasins. In order to determine the concentration levels of these elements 56 sediment sites and 46 soil sites were chosen at a depth of 0-20 cm; the sampling sites were selected considering geology, geoform, slope, drenage, soil unities, land use, and civil engineering works. In order to stablish the association existing between mineralogy and metalic ions the macroscopy technique was used. The samples were digested in a microwave oven, utilizing aqua regia as extractant. Concentrations were determined by atomic absorption flame spectrophotometry, with detection limits of 0.004 mg/kg-1for Ni and 0.002 mg/kg-1 for Cr. The ILWIS geographical information system was used for mapping the distribution of metalic ions. The statistical analysis did not show significant differences in the mean Ni and Cr contents both in soils and sediments. The grater Cr levels were found in the San Juan de Otates subbasin, while Ni showed a greater concentration in three subbasins in comparison with the rest of the area. The multivariate analysis pointed out that the two variables used (Ni and Cr) were not sufficient to make a proper choice of sampling sites in the different subbasins. According to mean world wide range reported for Ni and Cr, there are areas with natural contents higher than the ones found in San Juan de Otates basin. The Ni and Cr dispersion from its source point, shows geographical irregularity. In El Bajío, the channel of Santa Ana del Conde, which joins the arroyos of San Juan de Otates and El Juache, has lately increased the contents of the elements studied. Finally, the maps of Ni and Cr show, with respect to superficial soils and sediments, that there does not exist dispersion of these elements towards neighboring subbasins.
Idioma
spa
ISSN
ISSN electrónico: 2007-2902; ISSN impreso: 1026-8774

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