自贡地区恐龙骨骼化石及围岩特征的研究

Study on the Characterization of Dinosaur Fossils and Their Surrounding Rocks from Zigong

自贡地区恐龙化石埋藏丰富、分布广泛、保存完整,具有重要的科学价值、社会价值和经济价值。用X荧光衍射研究自贡恐龙骨骼化石及围岩元素组成,XRD结合红外光谱仪分析确定化石的矿物组成,化石切片和显微观察了解骨骼内部构造和填充物质。恐龙骨骼化石及围岩中的含钙量均较高(>5%),但化石含钙量达到30%以上;化石中的含硅量较低(0.24%—1.45%),围岩中的含硅量较高(>14%);化石中的含磷量为围岩的46倍以上。化石的主要化学成分是碳氟磷灰石,其次是碳酸钙;围岩的主要成分是二氧化硅。实验结果可为恐龙化石的鉴别及保护材料的研制提供理论依据。

The dinosaur fossils in Zigong are rich,widely distributed and well preserved,and have very important academic, social and economic value. The material compositions of the dinosaur fossils and their matrix in Zigong were studied with the help of XRF, XRD, FT-IR,microscope and chemical analysis methods. The fossils are rich in the contents of calcium （〉5%） and phosphorus. The fossils are more than 30% in the contents of calcium,but low in the content of silicon （0. 24%-1.45%）, while the matrix is high in the content of silicon （〉14%）. The fossils in the contents of phosphorus are more than 46 times rock. The major compound of the fossils is Ca10 （P,C）6 （O, F）26, followed by CaCO3;while that of the matrix is SiO2. The results of experiment will be the theoretical basis to research the protection material for dinosaur fossils and identification of dinosaur fossils.