Aspects of the Chemistry of Modern and Fossil Biological Apatites
Aspects of the Chemistry of Modern and Fossil Biological Apatites
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DOI：
10.1016/0305-4403(91)90070-6
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发表时间：
1991-05
影响因子：
2.8
通讯作者：
J. Lee-Thorp;N. J. Merwe
中科院分区：
文献类型：
--
作者：
J. Lee-Thorp;N. J. Merwe
简要回顾了关于使用骨和牙齿矿物质（生物磷灰石）作为胶原蛋白替代样品材料进行稳定碳同位素分析的有效性的争议。一些明显的矛盾可能是由于不同预处理方法以及组织选择的影响而出现的。实验结果记录了 1m 乙酸预处理对现代和化石生物磷灰石的同位素和矿物学影响。数据表明，这一过程对现代矿物具有显着影响。在 1m 乙酸中长时间反应会导致骨磷灰石重结晶为透钙磷石（二水合磷酸二钙），这表明对于最近的考古材料必须谨慎使用这种处理方法。对于较老的化石材料，没有观察到重结晶；变化更多地是由于方解石和更易溶解的磷灰石微晶的消除。结果表明，牙釉质提供了最一致的结果。因此，仅使用牙釉质对来自南非斯瓦特克兰斯洞穴的 1·8 Ma 灭绝灵长类动物的饮食进行应用研究。
The controversy about the validity of using bone and tooth mineral (biological apatite) as an alternative sample material to collagen for stable carbon isotope analyses is briefly reviewed. Some of the apparent contradictions may have arisen as a result of the effects of different pretreatment methods, as well as the choice of tissue. Experimental results are presented which document the isotopic and mineralogical effects of 1macetic acid pretreatment on modern and fossil biological apatites. The data show that this procedure has marked effects on modern mineral. Prolonged reaction in 1macetic acid leads to recrystallization of bone apatite to brushite (dicalcium phosphate-dihydrate), suggesting that this treatment must be used cautiously for recent archaeological materials. Recrystallization was not observed for older fossil material; changes are rather due to elimination of calcite and the more soluble apatite crystallites. The results indicate that enamel provides the most consistent results. Accordingly, only enamel was used for an applied study of the diets of 1·8 Ma extinct primates from Swartkrans Cave, South Africa.