王学烨^1,2,3,,
唐自华^1,3
1. 中国科学院地质与地球物理研究所, 中国科学院新生代地质与环境重点实验室, 北京 100029
2. 中国科学院大学, 北京 100049
3. 中国科学院地球科学研究院, 北京 100029

基金项目: 国家科技基础性工作专项项目（批准号：2014FY210500）和中国科学院地质与地球物理研究所2017年岩石圈演化国家重点实验室开放课题（批准号：201701）共同资助


详细信息

作者简介: 王学烨, 女, 26岁, 博士研究生, 第四纪地质学专业, E-mail:wangxueye@mail.iggcas.ac.cn

中图分类号: K878;Q983⁺.8;P618.78;P597⁺.2

收稿日期:2018-07-21
修回日期:2018-10-07
刊出日期:2019-01-30

High spatial resolution isotope analysis of enamel based on incremental features

Wang Xueye^1,2,3,,
Tang Zihua^1,3
1. Key Laboratory of Cenozoic Geology and Environment, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029
2. University of Chinese Academy of Sciences, Beijing 100049
3. Institutes of Earth Science, Chinese Academy of Sciences, Beijing 100029


MSC: K878;Q983⁺.8;P618.78;P597⁺.2

--> Received Date: 21 July 2018
Revised Date: 07 October 2018
Publish Date: 30 January 2019


摘要
摘要:牙釉质同位素分析是重建古食谱、古环境及人类迁移行为的重要手段。以往牙釉质同位素分析在采样方式上多集中于釉质表层的均匀采样，其代表牙釉质生长过程中的平均信号。近年来，随着高分辨率仪器发展，研究者提出了两种新的采样方式，为研究人和动物的季节特性提供了详细信息：1）微钻系列采样法，即以牙齿形成时间为约束，在牙釉质表层等间距采样，以获取牙釉质生长期间的季节性信息。这是目前最常用的方法，但该方法样品损耗大且时间精度低；2）微区采样法，即以牙釉质生长结构的形成时间为时间约束，利用高空间分辨率仪器进行原位分析。该方法不仅样品损耗量小，而且能反映同位素组成在牙齿内部更细微、复杂的变化，但存在测试精密度和准确度低等问题。目前，微区采样法尚处于起步阶段，但在古环境及考古研究中已有重要意义和研究前景。
关键词: 牙釉质生长结构/
季节性/
系列采样/
高分辨率采样/
同位素分析

Abstract:Stable isotope analysis of tooth enamel is widely used to reconstruct paleodietary, paleoenvironment and human migration patterns in the past. Previous studies mainly focus on the bulk sampling of enamel, which reflects the average isotopic signals during enamel formation. Recently, interest has focused on the possibilities of microsampling to reconstruct seasonal migration patterns of animals, which can be divided into two sampling strategies:(1) Intra-tooth sequential sampling. This sampling typically is based on evenly spaced sampling along the growth axis of the tooth in order to obtain a temporal sequence of isotopic changes recorded in enamel. Although this method is widely applied in paleoenvironment and archeology studies, it lacks precise time-series information and requires a large amount of samples. (2) High spatial resolution sampling, which is using high spatial resolution instruments for in situ isotopic analysis and is regarded as a micro-destructive approach. Based on enamel incremental features, this method potentially can accurately capture seasonal fluctuations of isotopic compositions in enamel, but it has lower precision and accuracy. High spatial resolution sampling has a great potential in reconstructing paleoenvironment, paleodietary and human migration patterns in archaeology studies although it is at initial stage.
Key words:enamel incremental features/
seasonal character/
intra-tooth sequential sampling/
high spatial resolution sampling/
isotope analysis



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