Estudio geológico y metalogénico de las mineralizaciones sedimentarias de manganeso de San Vicente de la Cabeza, provincia de Zamora (España)
- Luis Francisco Turrión Peláez
- María Candelas Moro Benito
ISSN: 0210-6558
Year of publication: 1988
Volume: 11
Issue: 2
Pages: 153-156
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 mm thick, alternating with other chert levels of similar thickness, and are constituted by pyrolusite, braunite and cryptomelane. These mineralizations, which are considered as syngenetic and produced by an exhalative volcanic process, are originated on an unstable continental plat - form by precipitation of Mn and SiO2, which were carried to the basin by hydrothermal solutions associated with volcanic phenomena.