Inicio del vulcanismo en el sector de Calañas (Faja Pirítica Ibérica). Caracterización y datación
First volcanic rocks of the Calañas area, Central Sector of the Iberian Pyrite Belt, are felsic lavas that are included in a black shaly sequence at the bottom of the Volcano-Sedimentary Complex. This sequence is stratigraphically conformable with the underlying Phyllite-Quartzite Croup. Well-preser...
| Autores: | , , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2002 |
| País: | España |
| Institución: | Universidad de Huelva (UHU) |
| Repositorio: | Arias Montano. Repositorio Institucional de la Universidad de Huelva |
| Idioma: | español |
| OAI Identifier: | oai:ariasmontano.uhu.es:10272/9111 |
| Acceso en línea: | http://hdl.handle.net/10272/9111 |
| Access Level: | acceso abierto |
| Palabra clave: | Iberian Pyrite Belt Black shales Palynostratigraphy Miospores Vulcanism Spain |
| Sumario: | First volcanic rocks of the Calañas area, Central Sector of the Iberian Pyrite Belt, are felsic lavas that are included in a black shaly sequence at the bottom of the Volcano-Sedimentary Complex. This sequence is stratigraphically conformable with the underlying Phyllite-Quartzite Croup. Well-preserved palynomorph assemblages have been obtained from the shales. The miospore assemblages are assigned to the LN Biozone, indicating a latest Devonian age for the beginning of vulcanism. Palynological and isotopic results from Tharsis, Aználcollar and Neves-Corvo orebodies are similar, suggesting that the shaly sequence of Calañas area can be laterally correlated with the mineralized level. Presence/absence of sulphide ores could be explained by changes of facies related with basin paleogeography |
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