Department of Geoscience, Aarhus University, DK-8000 Aarhus C, Denmark.
Sci Adv. 2019 Mar 13;5(3):eaav8083. doi: 10.1126/sciadv.aav8083. eCollection 2019 Mar.
The application of Sr/Sr in prehistoric mobility studies requires accurate strontium reference maps. These are often based from present-day surface waters. However, the use of agricultural lime in low to noncalcareous soils can substantially change the Sr/Sr compositions of surface waters. Water unaffected by agriculture in western Denmark has an average Sr/Sr ratio of 0.7124 as compared to an average of 0.7097 in water from nearby farmland. The Sr/Sr ratio obtained from samples over 1.5 km along a stream, which originates in a forest and flows through lime-treated farmland, decreased from 0.7131 to 0.7099. Thus, Sr/Sr-based mobility and provenance studies in regions with low to noncalcareous soils should be reassessed. For example, reinterpreting the iconic Bronze Age women at Egtved and Skrydstrup using values unaffected by agricultural lime indicates that it is most plausible that these individuals originated close to their burial sites and not far abroad as previously suggested.
锶同位素比值在史前迁徙研究中的应用需要准确的锶同位素比值参考图。这些通常基于现今的地表水。然而，在低到非钙质土壤中使用农业石灰可以显著改变地表水的锶同位素比值。丹麦西部不受农业影响的水的锶同位素比值平均值为 0.7124，而来自附近农田的水的平均值为 0.7097。从一条起源于森林并流经石灰处理农田的溪流中采集的样品，其沿着溪流采集了 1.5 公里长，其锶同位素比值从 0.7131 降低到了 0.7099。因此，在低到非钙质土壤地区，应该重新评估基于锶同位素比值的迁移和起源研究。例如，使用不受农业石灰影响的数值重新解释伊格特韦德和斯克里德鲁普的标志性青铜时代女性，表明这些个体最有可能来自他们的埋葬地点，而不是像以前建议的那样来自遥远的地方。
