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Origin and Migration of the Alpine Iceman
Wolfgang MÜLLER, Henry FRICKE et al.
inScience 302, p.862, 2003
presented by Ingmar Unkel
IUP-Literaturseminar SS 2004
Content
The local geological environment
The examined material
Stable isotopesO, C)
Radiogenic isotopes (Sr, Pb)
Conclusions
The local geological environment
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)
The examined material
teeth (3x enamel, 1x dentine)
bone (femur – cortical and trabecular)
intestinal content
clothing and equipment (goat fur, lime bast, larch wood)
The examined material
teeth
• canine, first and second premolar
• enamel, dentine
• age 3 to 5 years
The examined material
bone
• femur
• cortical, age 20 to 30 years
• trabecular, age 32 to 40 years
The examined material
intestine content
• last meal shortly before assassination
stable isotopes
Provide information about
altitude, latitude or position relative to a watershed (O) or paleodiet (C)
cool Atlantic influence, long transport
18O ~ -14-16‰
warm Mediterranean influence, short transport
18O ~ -11-13‰
lowering of 18O to the west
18 O – stable isotopes
18 O – stable isotopes
radiogenic isotopes
Refining how far south Oetzi lived, based on comparison to soil leachates of the 4 main lithologies
using: 87Sr/86Sr and 206Pb/204Pb
radiogenic isotopes
radiogenic isotopes
discussion
18 O -10,6 ‰ first premolar
-11,0 ‰ canine
-11,7 to -11,4 ‰ bone
-11 to -13 ‰ southern waters
87Sr/86Sr 0,7203 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
206Pb/204Pb 18,6 to 18,3 bone
discussion
discussion
postmortem alteration by meltwater• not observed in 18 O
• incipient in 87Sr/86Sr
12 white micas out of intestinal content• 40Ar/39Ar age distribution points at gneiss
lithology as living area
Most probable place of living during adulthood:
NW-SW of Merano
Thank you !