Inicio del vulcanismo en el sector de Calañas (Faja Piritica Ibérica). Caracterización y datación.

• Moreno, C. ^[1] ; González, F. ^[1] ; Sáez, R. ^[1] ; Sierra, S. ^[1]
  1. [1] Universidad de Huelva

     Universidad de Huelva

     Huelva, España

     
• Localización: Geogaceta, ISSN 0213-683X, Nº. 33, 2002, págs. 59-62
• Idioma: español
• Títulos paralelos:
  • Beginning of volcanism in the Calañas sector (lberian Pyrite Belt). Characterization and palynological dating
• Enlaces
  • Texto completo (pdf)
• Resumen

  • 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.