Universidad Complutense de Madrid
E-Prints Complutense

A high-resolution late Holocene speleothem record from Kaite Cave, northern Spain: δ18O variability and possible causes

Impacto

Downloads

Downloads per month over past year



Domínguez Villar, David and Wang, Xianfeng and Cheng, Hai and Martín Chivelet, Javier and Edwards, R. Lawrence (2008) A high-resolution late Holocene speleothem record from Kaite Cave, northern Spain: δ18O variability and possible causes. Quaternary international, 187 . pp. 40-51. ISSN 1040-6182

[img] PDF
612kB

Official URL: http://www.elsevier.com/wps/product/cws_home/865/description



Abstract

A high-resolution calcite oxygen stable isotopic (δ18O) record, covering the past 4000 years, was obtained from Kaite Cave, northern
Spain. The record has a mean δ18O value of -6.25% VPDB and a range of 2%. Spectral analysis of the d18O data shows significant
periodicities of 2400–1900, 600, 150, 27, and 22 years. The amplitudes during these periods range from 0.2% to 2%. Factors controlling
the isotopic ratio in the speleothem were evaluated. The calcite is most likely precipitated under equilibrium conditions, with the cave
calcite δ18O interpreted as a proxy of oxygen isotopic composition in local rainwater. Other factors such as temperature or fractionation
in the karst system prior to calcite precipitation are considered of negligible or of minor importance. Mechanisms affecting rainfall
isotopic composition were also investigated on different time scales. Precipitation amount is the primary factor controlling the high frequency
d18O oscillations. Other climate parameters, such as changes of storm tracks may have significant contributions on centennial
and millennial time scales.


Item Type:Article
Uncontrolled Keywords:Holocene, Kaite Cave, Northern Spain
Subjects:Sciences > Geology > Stratigraphic geology
ID Code:20313
Deposited On:07 Mar 2013 12:42
Last Modified:11 Dec 2018 08:42

Origin of downloads

Repository Staff Only: item control page