Barita de neoformación en la Arenisca de Villamayor (Salamanca)estudio preliminar
- Alonso-Gavilán, G. 1
- Moro, M.C. 1
- Cembranos, M.L. 1
- Areas, A. 2
- 1 Universidad de Salamanca, España
- 2 Minas y Geología. Salamanca, España
ISSN: 0213-683X
Année de publication: 1997
Titre de la publication: 22ª Sesión Científica, Bilbao 1997
Número: 22
Pages: 15-17
Type: Article
D'autres publications dans: Geogaceta
Résumé
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.