第三纪年代地层学进展

THE ADVANCE IN TERTIARY CHRONOSTRATIGRAPHY

本文简要回顾了最近二十年来第三纪年代地层学的主要进展;对大洋浮游生物地层学、磁性地层学、同位素年代学等相关领域的主要成果,以及全球第三系层型年代学的研究现状也作了简要介绍。

Over the past two decades,as the programs of DSDP and ODP revealed increasinglya great quantity of information from the deep ocean,the Tertiary chronostratigraphy hasbeen one of the frontiers that advances most rapidly in contemporary geosciences.Theprogress was initially stimulated by the availability of well-preserved and Undisturbeddeep-sea cores,and then continuously nourished by new information from the pro-jects.Based upon the improvements of plankton biostratigraphic datum events,radiochronology and correlations with magnetic polarity anomalies,the Tertiary stratigra-phy has been brought to the brink of a breakthrough that is approaching the limits ofstratigraphic resolution.A synthesis on these progresses,as well as the global Tertiarystratotype stratigraphy,is presented in this paper.