K/T界线的研究进展——兼论元素演化与恐龙灭绝的可能关系

doi:10.7523/j.issn.2095-6134.2005.6.002

摘要/Abstract

摘要：

通过总结近一二十年来K/T界线的研究进展和恐龙绝灭的相关假说,认为前人在K/T界线和恐龙灭绝的研究方面确实取得了很大的成果,但同时,大多数的研究都是集中在对灾变大环境的求证上.只有少数学者注意到Co、Cr、Ni、Mn、V等这些在界线处变化较大的元素同时也是生物必需的微量元素,而另外一些异常元素(如REE、Pb、Sr等)也可能对生物的正常生理机能产生重要影响,这些元素的异常变化很可能与恐龙灭绝存在着一定的关系.但这方面的系统研究还相当缺乏,今后应加强元素的生物机能和与生命活动密切相关的元素在K/T界线附近的演化与恐龙灭绝的关系等方面的研究。

关键词: K/T界线, 恐龙灭绝, 地球化学异常, 稳定同位素, 黏土矿物

Abstract:

This paper reviews the progress of work on the K/T boundary and dinosaurs extinction hypotheses,and concludes that,on the one hand,many achievements were acquired,but on the other hand,most of work in the past focused on evidence of the catastrophic environment.Only very few scientists who noted that Co 、Cr 、Ni 、Mn、V etc,contents of which display obvious changes,also are bio-necessary trace elements,and others,such as REE、Pb、Sr etc,may be very important for normal physiological functions of biology have realized that there may be affinity between the change of contents of some elements across the K/T boundary and dinosaurs extinction,so more systemic research should be done.In the future,we should strengthen such studies as the effects of elements on biology and so on.

Key words: K/T boundary, dinosaurs extinction, geochemical abnormities, stable isotopes, clay minerals

中图分类号:

X142

田晓雪, 雒昆利, 谭见安, 李日邦. K/T界线的研究进展——兼论元素演化与恐龙灭绝的可能关系[J]. 中国科学院大学学报, 2005, 22(6): 667-675.

TIAN Xiao-Xue, LUO Kun-Li, TAN Jian-An, LI Ri-Bang. Progress on the K/T Boundary : the Relation between Chemical Elements Abnormity and Dinosaurs Extinction[J]. , 2005, 22(6): 667-675.

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