Ostracode-based aminostratigraphy and aminochronology of a tufa system in central Spain

Torres Pérez-Hidalgo, Trinidad José (2005). Ostracode-based aminostratigraphy and aminochronology of a tufa system in central Spain. "Quaternary Internacional", v. 135 (n. 1); pp. 21-33. ISSN 1040-6182. https://doi.org/10.1016/j.quaint.2004.10.021.

Descripción

Título: Ostracode-based aminostratigraphy and aminochronology of a tufa system in central Spain
Autor/es:
  • Torres Pérez-Hidalgo, Trinidad José
Tipo de Documento: Artículo
Título de Revista/Publicación: Quaternary Internacional
Fecha: Junio 2005
Volumen: 135
Materias:
Escuela: E.T.S.I. Minas (UPM) [antigua denominación]
Departamento: Ingeniería Geológica [hasta 2014]
Licencias Creative Commons: Reconocimiento - Sin obra derivada - No comercial

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Resumen

In the Priego area, central Spain, extensive tufa deposits are located in three small tributaries located at the head of the 1000 kmlong Tagus River. The deposits are originated after karst-origin running waters emerged from the confines of the canyons and expanded outward. Old tufa deposits of Priego are mainly present as terraced alluvial plain deposits where different autochthonous and allochthonous facies appear. Extraclastic deposits of quartzite and limestone clasts derived from Mesozoic rocks are interbedded with the tufa marking pulsatory high-flow periods. Using the geomorphologic analysis six terraced levels were differentiated and sampled for ostracode amino acid racemization analysis. D/L ratios of aspartic acid and glutamic acid were used for dating purposes. Cluster analysis defined six aminozones (AMI-AM7) which were dated as follows: AMI: 407 ± 12 ka oxygen isotope stages (OIS 11); AM2: 263 ± 14 ka (OIS 7e); AM3: 181 ± 17 ka (OIS 7a); AM4: 136± 13 ka (OIS 5-6); AM5: 108 ± 14 ka (OIS 5); AM7: 11 ± 4 ka (OIS 1), indicating that tufa deposition took place during warm periods. Models of riverine and riverinebarrage tufa accumulation indicate that their maximum build-up took place between the canyon mouth and the point of depletion of dissolved CO2, and this affected the elevation of the top of the deposits and their relative chronology.

Más información

ID de Registro: 3453
Identificador DC: http://oa.upm.es/3453/
Identificador OAI: oai:oa.upm.es:3453
Identificador DOI: 10.1016/j.quaint.2004.10.021
URL Oficial: http://www.elsevier.com/wps/find/journaldescription.cws_home/865/description#description
Depositado por: Biblioteca ETSI Minas y Energía
Depositado el: 28 Jun 2010 12:55
Ultima Modificación: 20 Abr 2016 13:00
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