RT Journal Article
T1 Evidencia geoquímica de un área fuente común para las pelitas del Neoproterozoico Superior-Cámbrico Inferior en las Zonas Asturoccidental Leonesa, Cantábrica y Centro Ibérica
T1 Geochemical evidence for a common source area for the Upper Neoproterozoic-Lower Cambrian shales in the West Asturian-Leohese, Cantabrian and Central Iberian Zones
A1 Ugidos, José María
A1 Barba, Pedro
A1 Valladares, M. X.
AB The Upper Neoproterozoic shales of the West Asturian-Leonese and Cantabrian Zones are geochemically very homogeneous and show similar mean contents of Zr, Hf, Nb, rare earth elements, Y, Th, U, V, Cr, Co and Ni andelement ratios such as A!2OJTiOy Rb/Zr, (LalYb)n, Th/Yb, Ti/Zr, and Ti/Nb. The Lower Cambrian shales in the same Zones are'not as homogeneous although their Al2OJTiOy Rb/Zr, (La/Yb)n, Th/Yb, Ti/Zr, and Cr/Zr average ratios are systematically higher, and the Ti/Nb ratio lower, than those of the Upper Neoproterozoic.rocks. These distinctive features are coincident with those of the corresponding shales in the Central Iberian Zone. Thus, the geochemical data strongly support the notion that all three Zones shared a very extensive and homogeneous source area
PB Sociedad Geológica de España
YR 2004
FD 2004
LK http://hdl.handle.net/10272/8936
UL http://hdl.handle.net/10272/8936
LA spa
DS Repositorio Institucional de la Universidad de Huelva
RD 1 jun 2026