新生代6次陨击事件研究及存在问题  

THE RESEARCH DEVELOPMENTS AND PROBLEMS OF SIX METEORITE EVENTS SINCE CENOZOIC ERA

作　　者：尹延鸿[1] 陈正新[1] 

机构地区：[1]国土资源部青岛海洋地质研究所,青岛266071

出　　处：《海洋地质动态》2006年第2期15-19,共5页Marine Geology Letters

基　　金：国家自然科学基金资助项目(40272078)

摘　　要：陨击事件对古生物灭绝、古气候、古地质环境演化有重要影响。结合我们在陨击事件方面的新研究成果,探讨了新生代6次主要陨击事件的研究动态及存在问题。近几年来,一些新的陨击证据被进一步发现,有的微玻璃陨石场的分布范围进一步扩大,有的相关源陨击坑的研究取得了新的进展,当然,还有一些难解之谜需要进一步探讨。The meteorite events have a large influence on ancient weather, ancient environments and geological evolution. This paper discusses the research development and problems of six meteorite events since Cenozoic Era on the basis of our latest research achievements. The six large meteorite events occurred respectively at 65, 35, 14.7, 2.14~2.30, 1.04 and 0.7~0.83 MaBP. In recent years, some new evidences in meteorite impact were found out, and some microtektite strewn fields are larger than before. Some new achievements are made in source craters. Of course, some problems remain to be studied further.

关 键 词：陨击事件 微玻璃陨石 陨击坑 新生代 

分 类 号：P736.22[天文地球—海洋地质]