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Open Journal Systems

Quaternary dating by electron spin resonance (ESR) applied to human tooth enamel

Eduar Carvajal, Luis Montes, Ovidio A. Almanza

Abstract

This paper presents the results obtained from using electron paramagnetic resonance (EPR) to analyse tooth enamel found at the Aguazuque archaeological site (Cundinamarca, Colombia), located on the savannah near Bogota at 4° 37' North and 74°17' West. It was presumed that the tooth enamel came from a collective burial consisting of 23 people, involving men, women and children. The tooth enamel was irradiated with gamma rays and the resulting free radicals were measured using an electron spin resonance (ESR) X-band spectrometer to obtain a signal intensity compared to absorbed doses curve. Fitting this curve allowed the mean archaeological dose accumulated in the enamel during the period that it was buried to be estimated, giving a 2.10 ± 0.14 Gyvalue. ROSY software was used for estimating age, giving a mean 3,256 ± 190y before present (BP) age. These results highlight EPR's potential when using the quaternary ancient ruins dating technique in Colombia and its use with other kinds of samples like stalagmites, calcite, mollusc shells and reefs.

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Earth Sciences Research Journal - Universidad Nacional de Colombia - Editor: Carlos Alberto Vargas Tel: 3165000 Ext. 16514

E-mail: esrj@unal.edu.co

ISSN: 1794-6190 (print)
ISSN: 2339-3459 (online)

Indexed in:

	IBN Publindex Publindex is a Colombian bibliographic index for classifying, updating, rating and certifying scientific and technological publications. It is recognised by COLCIENCIAS and ICFES in Colombia.
	Directory of Open Access Journals DOAJ increases the visibility and ease of use of open access scientific and scholarly journals, aims to be comprehensive and cover all that journals that use a quality control system to guarantee the content. It's a one stop shop for users of OA Journals.
	SciELO Colombia SciELO Colombia is a virtual library for Latin-America, the Caribbean, Spain and Portugal, which was created by FAPESP in 1997 in Sao Pablo, Brazil. It is currently being managed in Colombia by the Universidad Nacional de Colombia.
	e-Revistas This is a web page providing open access to Spanish and Latin-American electronic journals. It was created in Spain.
	Science Citation Index Expanded^TM Thomson Reuters SCI is a prestigious online indexing system which incorporates bibliographic and citation data of scientific publications worldwide.
	Scopus Scopus is a bibliographic database publishing summaries and references concerning articles from scientific journals. It covers around 19,500 titles by more than 5,000 international editors, including coverage of about 16,500 journals.
	Latindex Latindex is the product of cooperation by a network of Latin-American institutions operating in a coordinated way to gather and disseminate bibliographic information about serialised scientific publications produced in the region.