四川开江恐龙骨骼化石矿物组分分离和微量元素组合的研究

The chemical separation of mineral compositions andtrace element assemblages from the dinosaurskeletal fossils in Kaijiang,Sichuan

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.