古脊椎动物学报2020，Vol.58Issue(2)：159-168,10.DOI:10.19615/j.cnki.1000-3118.200109
前处理与测试条件差异对化石牙釉质羟磷灰石稳定同位素数据的影响:以步氏巨猿动物群为例
Isotopic (C, O) variations of fossil enamel bioapatite caused by different preparation and measurement protocols: a case study of Gigantopithecus fauna
摘要
Abstract
Stable isotopic (C,O) analysis of fossil enamel bioapatite has been widely used in paleontological fields to reconstruct the paleoecology and paleoenvironment.It is common to compare the isotopic data of enamel bioapatite made by different pretreatment and measuring methods in different labs,without considering the isotopic variations possibly caused by different protocols.Here,we chose the same samples from Gigantopithecus fauna in the Longgu Cave (Longgudong),Hubei and remeasured their δ13C and δ18O values,which had been previously reported in Zhao et al.(2011) and Nelson (2014) with different pretreatment and measuring methods,in order to evaluate the effects of the above factors on the isotopic variability.The comparison among three isotopic dataset indicates that there did exist small isotopic variations on the δ13C and δ18O values.It seems that the δ13C values were more influenced,probably due to differential practices to eliminate the diagenetic effects using varied chemicals and retaining reaction time during the process of bioapatite preparation.However,we should emphasize that the small isotopic variations observed here do not have produced substantial isotopic variance among fossil taxa and localities,providing the preliminarily theoretical foundation to make isotopic comparison directly.Even so,we still recommend that it is best to compare the isotopic data according to the same preparing and measuring protocols to remove the systematic errors or to remeasure samples again in different labs to calibrate the data.关键词
牙釉质羟磷灰石/稳定同位素分析/羟磷灰石前处理/同位素数据测量Key words
fossil enamel bioapatite/stable isotope analysis/bioapatite pretreatment/isotopic measurements分类
生物科学引用本文复制引用
姜曲怡,赵凌霞,胡耀武..前处理与测试条件差异对化石牙釉质羟磷灰石稳定同位素数据的影响:以步氏巨猿动物群为例[J].古脊椎动物学报,2020,58(2):159-168,10.基金项目
中国科学院战略性先导科技专项(B类)(编号:XDB26000000)和国家自然科学基金(批准号:41773008)资助.This work was supported by the Strategic Priority Research Program of Chinese Academy of Sciences (XDB26000000) and National Natural Science Foundation of China (41773008). （B类）
