楚雄盆地恐龙化石和围岩的XRF全元素分析

The Study on Elements in Dinosaur Bone Fossils and Country Rocks from Chuxiong Basin,Yunnan Province by XRF

采用X射线荧光光谱分析方法(XRF),对楚雄盆地不同地区的恐龙化石和围岩的元素成分进行对比研究。实验结果表明,恐龙化石中的主元素含量的排序均是Ca、C、Si,而围岩中则均为Si、C、Ca;在恐龙化石中有元素F和As,在围岩中不含F和As;在化石和围岩中Pb元素的含量均较低。其次,通过对禄丰恐龙山的两组化石和围岩元素含量的对比分析,推知恐龙山所处地层可能发生过断裂和错位的地壳变动。实验还发现,武定、牟定和元谋的化石中的微量元素含量具有共同的特点,即元素砷(As)含量略高,钡(Ba)的含量高异常和锌(Zn)含量低异常,有可能是导致这三个地方恐龙动物群的死亡原因之一。

By using XRF method the contents of elements in dinosaur bone fossils and country rocks have been comparison analyse. This results indicated that the main elements in fossils are Ca. C. Si; an in country rocks are Si. C. Ca; that the element F and As have been found in the fossils, didn＇ t have been found in the rocks. The experiments also found that the content of Pb is lower whether in fossils or in rocks. The analytical results show that the high contents of Ba, tallish of As, and the lower of Zn of dinosaur fossils from wuding. Yuanmou and Mounding, this result permits us to infer that thus may be relation with the death of dinosaur faunae in these regions.