摘要
文章详述了恐龙骨骼化石矿物组分的化学分离方法,同时对开江恐龙骨骼化石样品进行了分离和中子活化分析,通过对测试结果进行生物地球化学的对比研究,发现恐龙骨骼化石中某些微量元素异常明显,并推断其中的砷(As)、铬(Cr)、铷(Rb)的高异常含量和锌(Zn)的低异常含量极有可能是导致开江恐龙动物群集群死亡的原因之一。
One chemical separation method used in mineral composition separation of the di- nosaur skeletal fossils is introduced in detail in this paper,and the chemical separation and instrumental neutron activation analysis(INAA)of the dinosaur skeletal fossils from Kai- jiang,Sichuan have been made.The biogeochemical study of the analytical results shows that the highly anomalous Ba,U and rare earth elements may well result from burial diage- nesis of the dead dinosaurs;it should not be responsible for mass extinction of dinosaurs. The high anomalies of As,Cr and Rb elements and low anomalies of Zn element in the fos- sils should be caused by the food chains and surrounding media,and thus may lead to the mass mortality of the dinosaur faunas in the study area.
基金
地质行业科学技术发展基金
关键词
矿物组分
化学分离
微量元素组合
恐龙骨骼化石
mineral composition
chemical separation
trace element assemblage
dinosaur skeletal fossil
Kaijiang in Sichuan