Formación de sulfuros de hierro en estuarios actuales:algunas consideraciones genéticas.

1. Borrego Flores, José
2. Morales González, Juan Antonio
3. Pendón Martín, José Gabriel

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Iron sulfides found in estuaries located along the mesotidal coast of Huelva (SW Iberia) show various kinds of occurrence and allow to infer their genesis as an early diagenetic process. Sediment burial produces the alteration of organic matter and the reduction of ferric iron which reacts with amorfous iron grains supplied by Plio-Pleistocene sediments from the substrate. Sulfates supplied by marine waters can produce reduction of sulfur. Iron sulfides precipitation is then taken into account

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