RT Journal Article T1 Estudio de los procesos de control geoquímico en sedimentos estuarinos mediante análisis factorial (estuario del río Tinto, SO de España) T1 Study of the geochemical control processes in estuarine sediments by means of factorial analysis (Tinto riverestuary, SW Spain) A1 López González, Nieves A1 Borrego Flores, José A1 Carro Flores, Berta A1 Lozano Soria, O. AB It has been determined absolute concentrations of major and trace elements and granulometrics compositionof two vibracores in the Tinto river estuary. Fe oxy-hydroxide precipitation and its scavenging effect onmetals is the main control process on the chemical composition of sediment. Factorial analysis of principalcomponents allows recognizing four groups, the first one is composed by metals associated to Fe2O3 andP2O5 (Cr, Cu, Zn, Pb, Ni, As, Cd, U, Mn, Co and Se). The second one related Ba, Rb, Y, Zr, Th and Sc withK2O and mud. The third group indicates the presence of phyllosilicates and heavy minerals, and is madeup of Cr, Ni, Zr, Li, Be, Y and V. The last one, formed by CaO and Sr, represents the carbonate presence ofbiogenic origin PB Sociedad Geológica de España YR 2004 FD 2004 LK http://hdl.handle.net/10272/8835 UL http://hdl.handle.net/10272/8835 LA spa DS Repositorio Institucional de la Universidad de Huelva RD 30 may 2026