Quimismo de las lutitas del Cretácico Inferior en el sector central de la Cuenca Vasco-Cantábrica.
- l. Yusta 1
- F. Velasco 1
- J. M. Herrero 1
- 1 Departamento de Mineralogía y Petrologfa. Universidad del País Vasco
ISSN: 0213-683X
Año de publicación: 1996
Número: 20
Páginas: 625-628
Tipo: Artículo
Otras publicaciones en: Geogaceta
Resumen
A lithogeochemical study of Lower Cretaceous shales (195 samples) from the Basque-Cantabrian region has been carried out to evaluate average values in majar and trace elements. Mineralogy and chemical content of majar oxides reveal a tropical weathering in the source area. Lower contents in Fe, Cu, Ni and Zn, both in sha/e and black shale, in comparison with rock averages reported in the literature, might be related with metal leaching processes suffered by these terrigenous sediments, compatible with ore accumulation in the urgonian limestone platforms.