Strontium isotope evidence of migration and diet in relation to ritual tooth ablation: a case study from the Inariyama Jomon site, Japan
Strontium isotope evidence of migration and diet in relation to ritual tooth ablation: a case study from the Inariyama Jomon site, Japan
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DOI：
10.1016/j.jas.2010.09.001
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发表时间：
2011
影响因子：
2.8
通讯作者：
Soichiro Kusaka;T. Nakano;T. Yumoto;M. Nakatsukasa
中科院分区：
文献类型：
--
作者：
Soichiro Kusaka;T. Nakano;T. Yumoto;M. Nakatsukasa
在绳文（日本新石器时代）社会的最后阶段（约1970年），人们广泛地使用了Ruman牙齿切除术。3000-2300 BP）。该传统包括两种不同的牙齿消融模式，4 I型和2C型，分别指下颌切牙和犬齿的拔除。然而，这种差异的原因尚不清楚。此前对稻成山贝壳丘人类遗骸的碳和氮稳定同位素分析显示，4 I型个体更依赖陆地资源，2C型个体更依赖海洋资源。为了验证这一假设，我们对同一骨骼遗骸和遗址周围的现代植物进行了锶（Sr）同位素（87 Sr/86 Sr）分析。由于植物的Sr同位素比因当地地质而异，而海水的Sr同位素比一致，因此牙釉质的Sr同位素比可以揭示迁移和饮食。比较植物和海水中的锶同位素比值与牙釉质，我们确定了四个可能的移民。4 I型当地人的Sr同位素比值明显高于2C型当地人。4 I型和2C型局部元素的比例分别接近于陆生植物和海水中的比例，表明4 I型局部元素吸收了大量来自陆生资源的Sr，而2C型局部元素吸收了大量来自海洋资源的Sr。这些结果支持这一假设，即仪式牙齿切除反映了整个个人的生活饮食差异，他们建议绳纹人之间可能的职业分化。
Ritual tooth ablation was extensively practiced among Jomon (Japanese Neolithic) societies in their final phase (ca. 3000–2300 BP). This tradition includes two different tooth ablation patterns, type 4I and type 2C, referring to extraction of the mandibular incisors and canines, respectively. However, the reason for this difference is unclear. Previous carbon and nitrogen stable isotope analysis of human remains from the Inariyama shell mound revealed that type 4I individuals were more dependent on terrestrial resources and type 2C individuals on marine resources. To test this hypothesis, we performed strontium (Sr) isotope (87Sr/86Sr) analyses on the same skeletal remains and on modern plants around the site. Because Sr isotope ratios of plants differ according to the local geology and seawater has a consistent Sr isotope ratio, the Sr isotope ratios of tooth enamel can reveal both migration and diet. Comparing Sr isotope ratios in plants and seawater with those of tooth enamel, we identified four possible immigrants. Type 4I locals had significantly higher Sr isotope ratios than type 2C locals. The ratios of the type 4I and type 2C locals were close to those of terrestrial plants and seawater, respectively, suggesting that type 4I locals had incorporated much Sr from terrestrial resources and type 2C locals from marine resources. These results support the hypothesis that ritual tooth ablation reflects dietary differences throughout an individual’s life, and they suggest possible occupational differentiation among the Jomon people.