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Published byRichard Reed Modified over 9 years ago
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Origin and Migration of the Alpine Iceman Wolfgang M ÜLLER, Henry F RICKE et al. in Science 302, p.862, 2003 presented by Ingmar Unkel IUP-Literaturseminar SS 2004
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Content The local geological environment The examined material Stable isotopes O, C) Radiogenic isotopes (Sr, Pb) Conclusions
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The local geological environment
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Objective Determination of Oetzi‘s birthplace habitat range of activity Isotopic tracing based on the transfer of the isotopic signature of soils and waters into biominerals (via nutrition)
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The examined material teeth (3x enamel, 1x dentine) bone (femur – cortical and trabecular) intestinal content clothing and equipment (goat fur, lime bast, larch wood)
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The examined material teeth canine, first and second premolar enamel, dentine age 3 to 5 years
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The examined material bone femur cortical, age 20 to 30 years trabecular, age 32 to 40 years
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The examined material intestine content last meal shortly before assassination
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stable isotopes Provide information about altitude, latitude or position relative to a watershed (O) or paleodiet (C)
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cool Atlantic influence, long transport 18 O ~ -14-16‰ warm Mediterranean influence, short transport 18 O ~ -11-13‰ lowering of 18 O to the west 18 O – stable isotopes
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radiogenic isotopes Refining how far south Oetzi lived, based on comparison to soil leachates of the 4 main lithologies using: 87 Sr/ 86 Sr and 206 Pb/ 204 Pb
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radiogenic isotopes
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discussion 18 O -10,6 ‰ first premolar -11,0 ‰ canine -11,7 to -11,4 ‰ bone -11 to -13 ‰ southern waters 87 Sr/ 86 Sr0,7203 to 0,7215 high ratios for enamel 0,7175 to 0,7184 bone Sr-Pb isotopic composition is consistent with compositions of gneisses and phyllites 206 Pb/ 204 Pb18,6 to 18,3 bone
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discussion
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postmortem alteration by meltwater not observed in 18 O incipient in 87 Sr/ 86 Sr 12 white micas out of intestinal content 40 Ar/ 39 Ar age distribution points at gneiss lithology as living area Most probable place of living during adulthood: NW-SW of Merano
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Thank you !
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