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

作　　者：张玉光[1] 李奎[1] 蔡开基[1] 

机构地区：[1]成都理工学院古脊椎动物研究室

出　　处：《岩相古地理》1998年第4期49-56,共8页

基　　金：地质行业科学技术发展基金

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.

关 键 词：矿物组分 化学分离 微量元素组合 恐龙骨骼化石 

分 类 号：Q915.864[天文地球—古生物学与地层学] Q915.23[生物学—古生物学]