ESR analyses for teeth from the open-air site at Attirampakkam, India: Clues to complex U uptake and paleoenvironmental change

In open-air sites, diagenetic alteration makes teeth difficult to analyze with electron spin resonance (ESR). Despite strong diagenetic alteration, three ungulate teeth from Pleistocene fluvial sediment in the open-air Paleolithic site at Attirampakkam, Tamil Nadu, India, were analyzed using standar...

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Bibliographic Details
Published in:Radiation measurements 2007-07, Vol.42 (6), p.1243-1249
Main Authors: Blackwell, Bonnie A.B., Montoya, Andrés, Blickstein, Joel I.B., Skinner, Anne R., Pappu, Shanti, Gunnell, Yanni, Taieb, Maurice, Kumar, Akhilesh, Lundberg, Joyce A.
Format: Article
Language:English
Subjects:
Earth sciences
Earth, ocean, space
Environmental Sciences
ESR analyses
Exact sciences and technology
Geochronology
Humanities and Social Sciences
Isotope geochemistry. Geochronology
Mammalian tooth enamel
Marine and continental quaternary
Paleontology
Surficial geology
Tooth diagenesis
U uptake
Vertebrate paleontology
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Summary:In open-air sites, diagenetic alteration makes teeth difficult to analyze with electron spin resonance (ESR). Despite strong diagenetic alteration, three ungulate teeth from Pleistocene fluvial sediment in the open-air Paleolithic site at Attirampakkam, Tamil Nadu, India, were analyzed using standard and isochron ESR. Diagenetic alteration features in two teeth indicated rapid submergence in quiet saline to hypersaline water, following a short subaerial exposure, while the third remained constantly buried under reducing conditions. Geochemical signatures and ESR data all indicate that the teeth experienced at least three independent U uptake events during diagenesis, including two that occurred long after burial.
ISSN:1350-4487
1879-0925
DOI:10.1016/j.radmeas.2007.05.040