安徽齐云山恐龙蛋化石为最新发现, 为研究恐龙蛋壳形成方式的多样性提供了新的资料。 利用偏光显微镜和激光拉曼光谱仪分析了齐云山恐龙蛋蛋壳的内部矿物组成和结构特征, 结果表明: 齐云山恐龙蛋壳的主要组成为方解石和有机基质, 其次还包括少量的石英、 蛋白石、 白云母、 白云石、 海绿石和针铁矿, 成因归属于矿质填充作用和碳化作用。 偏光显微结构特征显示, 原生方解石和次生方解石呈明暗交替的文象结构。 原生方解石结晶较差, 为蛋壳成岩石化的产物, 次生方解石结晶较好, 其中可见少量的石英。 拉曼测试原生方解石和次生方解石的主要特征峰均位于1 087, 282, 713和155 cm-1附近, 但次生方解石比原生方解石的特征拉曼峰散射强度更强, 结晶程度更高, 颗粒更粗大, 与镜下观察结果一致。 有机基质微晶振动和晶面内C—C伸缩振动的拉曼峰分别位于1 360和1 600 cm-1附近。 466, 209, 130, 357和404 cm-1附近的拉曼峰为石英的特征峰。 此外, 898, 629, 1 458, 654和481 cm-1附近的特征峰分别代表蛋白石、 白云母、 白云石、 海绿石和针铁矿, 表明围岩中的矿物质已通过蛋壳气孔或裂隙进入其内部。 该结论为研究恐龙蛋壳化石的矿物成因和赋存层位的沉积环境提供了重要的参考资料。

The dinosaur eggs from Qiyunshan, Anhui Province, are the newly discovery which can provide new information for researching the formation mechanisms of dinosaur eggshell. Polarizing microscope and Laser Raman spectroscopy were used to analyze the inner mineral composition and structure characteristics of Qiyunshan dinosaur eggshell in this paper. The results showed that the main minerals of eggshells composed of calcite, organic matter and little quartz, opal, muscovite, dolomite, glauconite and goethitewere formed by permineralization and carbonization. Polarizing microscope results revealed that primary calcite and secondary calcite appeared graphic structure. The crystalline degree of primary calcite was poor, which was the product of eggshell petrification, while the crystallinity of secondary calcite was better and there were little quartz in secondary calcite. Raman spectra analysis indicated that the Raman peaks of primary calcite and secondary calcite both appeared near 1087, 282, 713 and 155 cm-1, but the Raman intensity and crystallinity of secondary calcite with coarser particles were higher than primary calcite, which was consistent with the microscopic observations. Raman peaks appearing near at 1 360 and 1 600 cm-1were related to the tiny crystal vibration and C—C stretching vibration of organic matter. All of Raman peaks near 466, 209, 130, 357 and 404 cm-1were the characteristic peaks of quartz. In addition, the Raman peaked near 898, 629, 1 458, 654 and 481 cm-1represent opal, muscovite, dolomite, glauconite and goethite respectively, which suggested that minerals in the surrounding rock hadentered the inside of the eggshell. The conclusion provided important data for studying the mineral formation of eggshell and sedimentary environment of the dinosaur-egg-bearing strata.