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Late Pleistocene and Holocene mid-latitude palaeoclimatic and palaeoenvironmental reconstruction: an approach based on the isotopic record from a travertine formation in the Guadix-Baza basin, Spain

Published online by Cambridge University Press:  23 January 2013

ANTONIO J. PRADO-PÉREZ ,
ANTONIO DELGADO HUERTAS ,
M. T. CRESPO ,
A. MARTÍN SÁNCHEZ  and
LUÍS PÉREZ DEL VILLAR
ANTONIO J. PRADO-PÉREZ*
Affiliation:
Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas (CIEMAT) Avenida Complutense, no. 40, 28040 Madrid, Spain Centro de Estudios de Técnicas Aplicadas (CETA), Centro de Estudios y Experimentación (CEDEX), C/ Alfonso XII, 3 y 5, 28014 Madrid, Spain
ANTONIO DELGADO HUERTAS
Affiliation:
Laboratorio de Biogeoquímica de Isótopos Estables, Instituto Andaluz de Ciencias de la Tierra IACT(CSIC-UGR), Camino del Jueves s/n 18100 Armilla, Granada, Spain
M. T. CRESPO
Affiliation:
Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas (CIEMAT) Avenida Complutense, no. 40, 28040 Madrid, Spain
A. MARTÍN SÁNCHEZ
Affiliation:
Departamento de Física, Universidad de Extremadura, 06071 Badajoz, Spain
LUÍS PÉREZ DEL VILLAR
Affiliation:
Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas (CIEMAT) Avenida Complutense, no. 40, 28040 Madrid, Spain
*
†Author for correspondence: [email protected]
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Abstract

A comprehensive palaeoenvironmental reconstruction of the last 219 ka has been carried out by determining the isotopic signatures (δ18O and δ13C) in 766 samples of a thermogene travertine formation in the Guadix-Baza Tertiary basin (Granada, SE Spain). This travertine formation was dated from ≈ 220 to ≈ 5 ka by means of the alpha-spectrometry technique. Initially, the study of the δ18O values of the travertine formation was carried out because they are excellent indicators of the overall palaeoclimatic condition of a particular site. Likewise, the evolution of δ13C values, which can be directly related to the biomass development of the site, has also been studied. Finally, an integrated study of both isotopic records has been performed, identifying a total of 12 climatic periods based on their palaeoclimatic and palaeoenvironmental conditions. These periods are grouped into four climatic scenarios: scenario A, characterized by warm and dry periods; scenario B, characterized by cold and humid periods; scenario C, constituted by warm and humid periods; and scenario D, which is characterized by cold and dry periods. Palaeoclimatic scenarios A and B mainly characterized the palaeoclimatic evolution of the site, while in northern Europe the palaeoclimatic evolution is mainly characterized by scenarios C and D. Therefore, it is suggested that the palaeoenvironmental evolution at lower latitudes on the Iberian Peninsula is the opposite of that identified in northern Europe. However, the main climatic events identified at higher latitudes are also reflected in the studied area.

Keywords

PleistoceneHolocenepalaeoclimatologytravertineBetic CordilleraSpain
Type
Original Articles
Information
Geological Magazine , Volume 150 , Issue 4 , July 2013 , pp. 602 - 625
Copyright
Copyright © Cambridge University Press 2013 

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