Degree of trace metal pyritization in sediments from the Pacific coast of baja california, mexico
We analyzed sediments from a core collected on the Pacific coast of Baja California, ~45 km off the city of Tijuana and at 1257 m water depth (32º29.5′N, 117º28.3′W), for trace metal content in two operationally-defined fractions, HCl and pyrite. Our results indicate a transference of Cu > Ni...
| Autores: | , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2001 |
| País: | México |
| Institución: | UNIVERSIDAD AUTÓNOMA DE BAJA CALIFORNIA |
| Repositorio: | Ciencias Marinas |
| Idioma: | inglés |
| OAI Identifier: | oai:cienciasmarinas.com.mx:article/456 |
| Acceso en línea: | https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/456 |
| Access Level: | acceso abierto |
| Palabra clave: | trace metals pyrite sediment degree of trace metal pyritization Baja California metales traza pirita sedimento grado de piritización de metal traza |
| Sumario: | We analyzed sediments from a core collected on the Pacific coast of Baja California, ~45 km off the city of Tijuana and at 1257 m water depth (32º29.5′N, 117º28.3′W), for trace metal content in two operationally-defined fractions, HCl and pyrite. Our results indicate a transference of Cu > Ni > Zn >> Hg and Ag from the HCl to the pyrite fraction. Sediments have degrees of pyritization (DOP) that averaged 7.2 ± 4.9%, with a maximum value of 18.5%. Average degrees of trace metal pyritization (DTMP) ranged from 6.2 ± 2.1% to 83 ± 18% for Mn and Hg, respectively, although maximum values for some metals were close to 100%. This transference is apparently a function of the solubility products of metal sulfides and the relative abundances of metals in the HCl fraction, as suggested by the significant correlation (p < 0.001) observed between these two parameters and the DTMP of a number of trace metals. A similar correlation was obtained from published data of two cores collected in the Gulf of Mexico. |
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