The Origin and Evolution of Late Holocene Tsunamiites in the Doñana National Park (SW Spain): Trace Elements as Geochemical Proxies

Minerals

MaríaIsabel Prudencio¹  Rosa Marques¹  MaríaIsabel Dias¹  Manuel Abad²  Verónica Romero³  Josep Tosquella³  Paula Gómez³  Antonio Toscano³  Marta Arroyo³  Joaquín Rodríguez Vidal³  LuisMiguel Cáceres³  Francisco Ruiz³  MaríaLuz González-Regalado³  MaríaIsabel Carretero⁴  Guadalupe Monge⁴  JuanManuel Muñoz⁵  Manuel Pozo⁶  Tatiana Izquierdo⁷ 

[1] Centro de Ciências e Tecnologias Nucleares (C2TN), Instituto Superior Técnico, Universidade de Lisboa, Estrada Nacional 10 (k 139.7), 2695-066 Bobadela LRS, Portugal;Departamento de Biología y Geología, Física y Química Inorgánica, ESCET, Universidad Rey Juan Carlos, 28933 Móstoles, Spain;Departamento de Ciencias de la Tierra, Universidad de Huelva, Avda. Tres de Marzo, s/n, 21071 Huelva, Spain;Departamento de Cristalografía, Mineralogía y Química Agrícola, Universidad de Sevilla, C/Profesor García González 1, 41012 Sevilla, Spain;Departamento de Estadística e Investigación Operativa, Universidad de Sevilla, C/Profesor García González 1, 41012 Sevilla, Spain;Departamento de Geología y Geoquímica, Universidad Autónoma de Madrid, Avda. Francisco Tomas y Valiente 7, 28049 Madrid, Spain;Instituto de Investigaciones Científicas y Tecnológicas de la, Universidad de Atacama (IDICTEC-UDA), Avenida Copayapu, 485, 1532297 Copiapó, Chile;

关键词: tsunamiite;    geochemical proxies;    trace elements;    statistical analysis;    Holocene;    estuary environment;   

DOI  :  10.3390/min10110956

来源: DOAJ

【 摘 要 】

The elemental content—mainly trace elements—of samples from two boreholes (PLN, CM) with evidence of tsunamiites, located in the Doñana National Park (SW Spain), were studied. The geochemical variations of the REE, LILE, HFSE, and other elements (Al, Ti, S, Na, Br, Sc, Co, Cr) were interpreted according to the mineralogy present in the samples. The results obtained show the geochemical complexity of the estuarine paleoenvironments, in this case with the existence of three Holocene-age tsunamigenic deposits (around 4.25, 3.56 and 2.2–2 kyr BP). The statistical analysis of the samples’ geochemistry, by means of linear correlation and factor analysis, made it possible to differentiate two associations. The first is representative of an inherited mineralogy (REE-Y-Rb-Sr-Cs-Th-U-Hf-Al-Ti-Co-Cr-Sc); the second includes elements (Br-Na) linked to mineral formation under evaporite conditions (halite). The trace element geochemistry of sediments thus becomes an excellent tool to identify tsunamiites in the studied zone, especially those elements that are clear proxies for marine incursions (Na, Br, Sr) and high energy events (Hf, Ti). The parent area of the provenance of the materials is mainly of felsic composition.

【 授权许可】

Unknown