Estudio mineralógico, químico e isotópico preliminar de los sulfuros de Fe (Zn y Cu) silúricos de Latedo-Sejas de Aliste(Zamora)

1. Timón Sánchez, Susana
2. Moro Benito, María Candelas
3. Fernández Fernández, Agustina

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Resumen

The Fe (Cu and Zn) sulfides of Latedo-Sejas are constituted of pyrite-pyrrhotite (sphalerite, chalcopyrite and arsenppyríte) and, on the basis of the ir textural and structural characteristics, three mineralógicaI stages have been differentiated: early sin-diagenetic (before phase 1), late sin-diagenetic (before or sinphase 1) and sin-phase 3. The first mineralogical phase consists of po (py, sp, cp) and the other two of py (po, cp, sp) and py±po (cp, sp). The Co and Ni contents in pyrites or pyrrhotites as well as the Co/NI ratio and the isotopic values, suggests that these sulfides have a sedimentary origin. Futhermore the formation T calculated using the arsenopyrite like a geothermometer is about 415°C.

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