Barita de neoformación en la Arenisca de Villamayor (Salamanca)estudio preliminar

  1. Alonso-Gavilán, G. 1
  2. Moro, M.C. 1
  3. Cembranos, M.L. 1
  4. Areas, A. 2
  1. 1 Universidad de Salamanca, España
  2. 2 Minas y Geología. Salamanca, España
Revista:
Geogaceta

ISSN: 0213-683X

Ano de publicación: 1997

Título do exemplar: 22ª Sesión Científica, Bilbao 1997

Número: 22

Páxinas: 15-17

Tipo: Artigo

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Outras publicacións en: Geogaceta

Resumo

The barite studied in the Villamayor sandstone is located in old rhizoliths related to subvertical fractures which affect these subarcosic deposits. These zones are actually in great circulation within underground waters and fuIl of clay materials. The mineral' s form together with ist mineralogical, chemical and isotopic characteristics suggests that its formation is related with the postneogene alteration processes (caolinitization) of sandstones which libera te Ba of the feldspars and with the infiltration and circulation of metheoric waters that contain dissolved sulphates.

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