对河南西峡晚白垩世地层中恐龙蛋、围岩分别采样进行中子活化分析(NAA)，发现恐龙蛋化石的元素组合特征表现出铱(Ir)和锶(Sr)的明显含量异常，推理分析得出高异常铱、锶元素共同作用导致晚白垩世恐龙蛋的结构出现异常和病变，从而未能孵化出壳，这也可能是河南西峡恐龙蛋化石大量“富集”的原因。此外，元素的组合规律初步表明河南西峡晚白垩世时的气候应具有干旱、半干旱的特征。

Neutron activation analysis of respectively samplings of dinosaur egg fossils and wall rocks from the Upper Cretaceous in Xixia, Henan Province demonstrates that elementary combinations in the dinosaur egg fossils are featured by obvious abnormal high contents of both iridium and strontium,which are inferred to have caused fabric and pathological changes of those eggs. Thereby the dinosaur eggs couldn't be hatched, and probably resulted in the high concentration of their fossils. Moreover,the analysis of elementary combinations as well as geological data indicates that the climate during the Late Cretaceous in this area might have been semiarid to arid.

Q915.21 P532

中国科学院重要方向性项目 (KJCX2 N10 )，北京市科研院萌芽计划 (MY/2 0 0 1 19)项目成果