岩矿测试Issue(5)：520-527,8.DOI:10.15898/j.cnki.11-2131/td.2015.05.004
河南西峡晚白垩世恐龙蛋化石壳微量元素组成及其对恐龙灭绝的指示意义
Trace Element Determination of Late Cretaceous Dinosaur Eggshell Fossils from Xixia Basin,Henan Province by ICP-OES and Its Implications for Extinction of Dinosaurs
摘要
Abstract
Dinosaur egg fossils are important for exploring the survival and extinction of the dinosaurs. Current researches on dinosaur egg fossils are concentrated in their biology and burial features. In this study,Inductively Coupled Plasma-Optical Emission Spectrometry( ICP-OES)was used to determine trace element composition of twelve dinosaur eggshell fossils in the late Cretaceous from Xixia basin and their surrounding rocks,in order to the relationship between trace elements and the extinction of dinosaurs. Results show that the dinosaur eggshell fossils are depleted in organic elements such as C,N,P and S,and mainly consist of essential elements such as Ca,Al, Mg,Fe and K and other trace elements such as Sr,Mn,Ba,La,Zn,B,V,Co and Ir. Abnormal high Ir and Sr may be related to the extraterrestrial impact event causing the dramatic changes of the ecological environment. Element assemblages indicated that the climate during the late Cretaceous in this area might have been semiarid to arid. Abnormal high Ir and Sr in the environment probably have caused structure and pathological changes of those eggs within the dinosaurs. Thereby the dinosaur eggs could not be hatched,which probably resulted in the gradual demise of dinosaurs. This study provides an important basis for investigating the living environment of dinosaurs, causes of extinction and the late Cretaceous climate.关键词
恐龙蛋壳/生命微量元素/锶和铱/超高异常/电感耦合等离子体发射光谱法Key words
dinosaur eggshell/trace elements of life/strontium and iridium/obvious abnormality/Inductively Coupled Plasma-Optical Emission Spectromet ry分类
生物科学引用本文复制引用
汪晓伟,姚肖永,徐学义..河南西峡晚白垩世恐龙蛋化石壳微量元素组成及其对恐龙灭绝的指示意义[J].岩矿测试,2015,(5):520-527,8.基金项目
国家重点基础研究发展计划（973计划）项目（2013CB837100）；长安大学优秀博士论文培育资助项目（310827150）；中央高校基本科研业务费专项基金 （）
