Las mineralizaciones de Mn volcánico-sedimentarias de S. Vicente de la Cabeza (Zamora)
- Luis Francisco Turrión Peláez 1
- María Candelas Moro Benito
- 1 Universidad de Salamanca (Departamento de Geología)
ISSN: 0210-6558
Year of publication: 1989
Volume: 12
Issue: 0
Pages: 303-313
Type: Article
More publications in: Boletín de la Sociedad Española de Mineralogía
Abstract
The Mn mineralizations are embedded in the Early Silurian materials. They occur as levels, a few mms. thick, alternating with other chert levels of similar thickness, and are constituted bypyrolusite, psilomelane, cryptomelane, braunite and mycrocrystalline quartz. These mineralizations, which are considered as syngenetic and produced by an exhalative hydrothermal process, are originated by precipitation of Mn, Si and Fe which were carried to the deep sea by hydrotermal solutions associated with volcanic phenomena.