Modelling strontium isotopes in past biospheres - Assessment of bioavailable Sr/Sr ratios in local archaeological vertebrates based on environmental signatures.

Sr/Sr isotopic ratios in skeletal remains of archaeological vertebrates are used for provenance analysis since long. However, the definition of the past bioavailable isotopic ratio at the site of recovery is not known beforehand and geological maps can provide no more than gross expectations. Therefore, the assessment of the "local Sr isotopic signature" is still of crucial importance.