d34S de los sulfuros silúricos tipo "sedex" de Latedo-Sejas de Aliste (Zamora, España).

• S. M. Timón Sánchez ^[1] ; M. C. Moro Benito ^[1] ; A. Fernández Fernández ^[1]
  1. [1] Dpto. de Geología. Facultad de Ciencias. Univ. Salamanca. 37008 Salamanca.
• Localización: Geogaceta, ISSN 0213-683X, Nº. 20, 7, 1996, págs. 1535-1538
• Idioma: español
• Títulos paralelos:
  • d34S of the "sedex" type Silurian sulphides of Latedo-Sejas de Aliste (Zamora, Spain).
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• Resumen

  • The sulphides of Latedo-Sejas are mainly constituted of pyrite-pyrrhotite and, on the basis of their textural and structural characteristics, two mineralogical stages have been differentiated: syn-diagenetic and/or metamorphic (befare or syn-phase 1) and syn-phase 3. The mineralization is associated to two processes of alteration: carbonatization and chloritization. Owe to d34S values, a biogenic origin can be attributed to these sulphides with greater hydrothermal contamination in Latedo. The changes in d34S values are due to the transit from a deep anoxic to another shallow and coastal environment in the sedimentary basin.