Abstract

URQUIZA, Silvana V.. TAPHONOMIC AND GEOCHEMICAL CONTROLS ON CAMELIDAE RECORD USING X-RAY DIFFRACTION (XRD). ARGENTINE SOUTHERN PUNA (EARLY AND LATE HOLOCENE). Ser. correl. geol. [online]. 2016, vol.32, n.2, pp.1-10. ISSN 1666-9479.

In order to assess the variability in preservation of the bone record from the ca. 9000 BP to recent date were conducted several X-ray Diffraction (XRD) and petrographical analysis on samples from several archaeological sites from the Southern Argentine Puna. The samples are composed of bone and teeths from open-air and overhang sites. Samples display variability in diagenetic pathways, being bones more sensitive than teeths to suffer chemical exchanges. In overhang sites diagenetic processes were more intense, displaying XRD high values of Ca₅ (PO₄)₃(OH) and mineral exchange of KCl to the Early Holocene. In Late Holocene, in open-air and overhang sites were observed high values of PH₃. Thermal altered bones and teeth fragments have not displayed mineral exchanges.

Keywords : Geochemistry. Taphonomy. Camelidae. Holocene. Argentine Puna..

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