New Evidence of Extraterrestrial Cause for the Cretaceous-Tertiary Extinction——The Abundance of Ruthenium and Its CorrelationWith Iridium  

作　　者：辛晓滨 许祥源 吉望西 罗勇 李良权 薛猛 毛雪瑛 柴之芳 欧阳宏 

机构地区：[1]Department of Modem Applied Physics, Tsinghua University, Beijing 100084, PRC [2]Institute of High Energy Physics, Academia Sinica, Beijing 100080, PRC

出　　处：《Chinese Science Bulletin》1994年第10期842-845,共4页

基　　金：National Natural Science Foundation of China.

摘　　要：1 Introduction In 1980, L. W. Alvarez suggested a hypothesis that the falling of a largeextraterrestrial body upon the earth caused the extinction event at the end of theCretaceous, according to the extraordinarily high concentration of Ir in K/T boundarydeposits. Since then, studies have indicated that the iridium anomaly distributeswidely in the sections of this age over the world. However, these studies focused onthe abundance of Ir. Little attention was paid to other platinum group metals (PGM).Analyzing the abundance of Ru in boundary samples is very difficult because of

关 键 词：Cretaceous-Tertiary (K/T) boundary resonance ionization mass spectroscopy (RIMS) correlation of Ru and Ir. 

分 类 号：O572[理学—粒子物理与原子核物理]