Please use this identifier to cite or link to this item: http://hdl.handle.net/10553/46243
Title: Effectiveness of combined unspiked K–Ar and 40Ar/39Ar dating methods in the 14C age range
Authors: Guillou, Hervé
Nomade, Sébastien
Carracedo, Juan Carlos 
Kissel, Catherine
Laj, Carlo
Perez Torrado, Francisco José 
Wandres, Camille
UNESCO Clasification: 250621 Vulcanología
Keywords: Geochronology
Canary islands
Volcanism
Issue Date: 2011
Journal: Quaternary Geochronology 
Abstract: In this study, the effectiveness of combined unspiked K–Ar and 40Ar/39Ar dating methods as currently applied now at LSCE in the 14C age range was evaluated by studying two 30,000 years old phonolites from Tenerife (Canary Islands). New 40Ar/39Ar ages obtained in this work are comparable with the K–Ar ages, and of similar precision. This remarkable agreement obtained between the two dating methods in this young age range, validates the new LSCE 40Ar/39Ar facility and provides a very promising approach to calibrate the Quaternary timescale and to date key events such as geomagnetic field instabilities and climatic changes. The approach combining the 40Ar/39Ar and the unspiked K–Ar methods has the advantage that all the basic assumptions, which rule the K–Ar clock, are checked via the isochron approach. In the event of positive check, the 40Ar/39Ar and unspiked K–Ar ages can be pooled to produce very precise ages.
URI: http://hdl.handle.net/10553/46243
ISSN: 1871-1014
DOI: 10.1016/j.quageo.2011.03.011
Source: Quaternary Geochronology [ISSN 1871-1014], v. 6 (6), p. 530-538
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