Resolving archaeological populations with Sr-isotope mixing models

Abstract

) 'Resolving archaeological populations with Sr-isotope mixing models.', Applied geochemistry., 22 (7). pp. 1502-1514. Further information on publisher's website:http://dx.doi.org/10.1016/j.apgeochem. 2007.02.009 Publisher's copyright statement: NOTICE: this is the author's version of a work that was accepted for publication in Applied geochemistry. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reected in this document. Changes may have been made to this work since it was submitted for publication. A denitive version was subsequently published in Applied geochemistry, 22 (7), 2007, 10.1016/j.apgeochem.2007.02.009 Additional information: Use policyThe full-text may be used and/or reproduced, and given to third parties in any format or medium, without prior permission or charge, for personal research or study, educational, or not-for-prot purposes provided that:• a full bibliographic reference is made to the original source • a link is made to the metadata record in DRO • the full-text is not changed in any way The full-text must not be sold in any format or medium without the formal permission of the copyright holders.Please consult the full DRO policy for further details. Sr ranges, it is possible to separate two populations based on the structure within the data set.

Faunal migration in late‐glacial central Italy: implications for human resource exploitation

“…The most striking feature of the enamel dataset is that all the 87 Sr/ 86 Sr values are below 0.7092, the value of modern seawater, and are consistent with marine carbonate sediments. 32 There is little reported data on normal Sr isotope ranges in co-habiting animal groups, but compared with the range observed in archaeological human communities inhabiting regions of sedimentary marine carbonates, 26 the isotopic range amongst animals in this study is small (i.e. 0.70861 to 0.70904), despite the considerable geographic distances between the cave sites ( Fig.…”

“…It is possible that the strontium ratios result from mixing rather than being a direct reflection of a single input source; 26 however, given the small isotopic range observed, it is difficult to identify suitable endmembers other than marine carbonates to support this conclusion for these particular samples. Figure 3 shows that the ratios and concentrations obtained from four of the six dentine samples are quite different from those of the corresponding enamel.…”

“…63,64 Consequently, in modern individuals one can expect the Sr concentration and isotope ratio of these two tissues to remain very similar and this does appear to be the case even in individuals who have subsequently been exposed to different sources of Sr. 64,65 Similarly, archaeological teeth that have not been buried in soil also show this pattern. 26 In teeth excavated from buried sediments, however, dentine usually contains more Sr than does enamel and this increase is normally coupled with 87 Sr/ 86 Sr ratios intermediate between the enamel value and that of the mobile strontium in the burial soil. 26,66,67 In most of our samples, dentine shows an elevated Sr concentration and a decrease in isotope ratio suggesting this tissue underwent secondary modifications during burial and that the mobile soil strontium was less radiogenic than that preserved in the enamel.…”

“…2) were cut transversely from the enamel and then bisected to produce one sample for d 18 87 Sr/ 86 Sr and strontium concentrations were obtained for each dentine sample to provide an indication of diagenetic strontium present at the burial site. 26 …”

“…[18][19][20][21][22][23][24] In addition, the 87 Sr/ 86 Sr composition of animals from a specific locality is influenced by non-geological sources, such as rainwater. [25][26][27] There is, however, limited 87 Sr/ 86 Sr biosphere data currently available for the study region, and we have, therefore, largely relied on predictions based on the geological literature and studies from comparable geological formations.…”