稳定同位素地层学和事件地层学在白垩系－第三系界线划分中的应用  

APPLICATION OF STABLE ISOTOPE STRATIGRAPHY AND EVENT STRATIGRAPHY TO THE DEMARCATlON OF K/T BOUNDARY

作　　者：叶得泉[1] 钟筱春[1] 唐文松[1] 徐静慧[1] 徐道一[1] 严正[1] 

机构地区：[1]大庆石油管理局勘探开发研究院,国家地震局地质研究所

出　　处：《微体古生物学报》1994年第2期141-152,共12页Acta Micropalaeontologica Sinica

摘　　要：应用稳定同位素地层学和事件地层学研究方法，对新疆阿尔塔什海相剖面和连木沁陆相剖面的白垩系－第三系界线进行了详细研究，均发现了碳同位素异常和铱等元素异常，并与国外Ｋ／Ｔ界线研究结果进行了对比，取得了很好的效果。特别是在连木沁陆相剖面的Ｋ／Ｔ界线层中首次发现了碳同位素异常和铱等元素异常，为铱在全球性的分布增添了实例，同时也为海、陆相Ｋ／Ｔ界线准确的洲际对比提供了依据。This paper applies the method of stable isotope stratigraphy and event stratigraphy to the studies of the K/T boundary in detail in the Altax section of marine facies and in the Lianmuqin section of terrestrial facies in Xinjiang.In abnormal elements such as carbon isotope, iridium, etc. found close to the boundary,this study can be compared with the foreign study at the K/T boundary with good results. Especially, the first findings from the K/T boundary strata in the Lianmuqin section of terrestrial facies show that iridium is dispersed all over the world , and furnish fresh evidence for accurate intercontinental correlation at the K/T boundary of marine and non-marine facies.

关 键 词：稳定同位素 地层学 事件地层学 白垩纪 第三纪 

分 类 号：Q913.653[天文地球—古生物学与地层学]