Department of Chemistry, University of Reading, Whiteknights, Reading RG6 6AD, UK.
Spectrochim Acta A Mol Biomol Spectrosc. 2012 Jan;85(1):155-9. doi: 10.1016/j.saa.2011.09.050. Epub 2011 Sep 29.
We have carried out a thorough mineralogical analysis of 16 pottery samples from the Lapita site of Bourwera in Fiji, using micromorphological techniques with optical and polarising microscopes. While the overall mineralogy of all of the samples is similar the samples clearly divide into two groups, namely those with or without the mineral calcite. Our findings are backed up by chemical analysis using SEM-EDX and FTIR. SEM-EDX shows the clear presence of inclusions of calcite in some of the samples; FTIR shows bands arising from calcite in these samples. The study suggests that it is likely that more than one clay source was used for production of this pottery, but that most of the pottery comes from a single source. This finding is in line with previous studies which suggest some trading of pottery between the Fijian islands but a single source of clay for most of the pottery found at Bouwera. We found no evidence for the destruction of CaCO(3) by heating upon production of the pottery in line with the known technology of the Lapita people who produced earthenware pottery but not high temperature ceramics.
我们使用光学和偏光显微镜的微形态技术，对斐济博瓦拉拉皮塔遗址的 16 个陶器样本进行了全面的矿物学分析。虽然所有样本的总体矿物学相似，但它们明显分为两组，即有或没有矿物方解石的样本。我们的发现得到了使用 SEM-EDX 和 FTIR 进行的化学分析的支持。SEM-EDX 显示一些样本中明显存在方解石的夹杂物；FTIR 显示这些样本中方解石的谱带。该研究表明，用于制作这种陶器的粘土来源可能不止一个，但大多数陶器来自单一来源。这一发现与之前的研究一致，这些研究表明斐济群岛之间存在一些陶器贸易，但博瓦拉发现的大多数陶器都来自单一的粘土来源。我们没有发现生产陶器时 CaCO(3)因加热而被破坏的证据，这与生产陶器的拉皮塔人的已知技术一致，他们生产的是陶器而不是高温陶瓷。
