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

  1. Moreno, C. 1
  2. González, F. 1
  3. Sáez, R. 1
  4. Sierra, S. 1
  1. 1 Universidad de Huelva
    info

    Universidad de Huelva

    Huelva, España

    ROR https://ror.org/03a1kt624

Revue:
Geogaceta

ISSN: 0213-683X

Année de publication: 2002

Número: 33

Pages: 59-62

Type: Article

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D'autres publications dans: Geogaceta

Résumé

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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