Caracterización mineralógica de facies sedimentarias de edad Pleistoceno superior-Holoceno en el Parque Nacional de Doñana (Huelva)implicaciones paleoambientales
- Manuel Pozo Rodríguez 1
- María Isabel Carretero León 2
- Francisco Ruiz Muñoz 3
- Joaquín Rodríguez Vidal 3
- Luis Miguel Cáceres Puro 3
- Manuel Abad de los Santos 3
- 1 Dpto. de Geología y Geoquímica, Facultad de Ciencias, Universidad Autónoma de Madrid
- 2 Dpto. de Cristalografía, Mineralogía y Química Agrícola, Universidad de Sevilla
- 3 Dpto. de Geodinámica y Paleontología, Universidad de Huelva
ISSN: 1576-5172
Year of publication: 2008
Issue Title: VII Congreso Geológico de España
Issue: 10
Pages: 953-956
Type: Article
More publications in: Geotemas (Madrid)
Abstract
The textural and mineralogical study of 65 samples from two long cores and seven short coresdrilled in Doñana National Park has been done. On the basis of grain-size analysis, six sedimentaryfacies dated as Late Pleistocene-Holocene have been differentiated. These facies mainly consist of finegrained sediments, locally eroded and filled with coarser grained sediments. The results indicate a bulkmineralogy association made-up of_ phyllosilicates (muscovite, paragonite, clay minerals)-carbonates(calcite,dolomite)-feldspars (Ca-Na,K)-heavy minerals. Clay mineral assemblage is composed of_smectite-illite-kaolinite-(chlorite, mixed layers). The significant illite increase in facies FA-5 whencompared with underlying sediments, besides sedimentological and paleontological evidencescorroborates the identification of several tsunamite beds in the studied sector.