高分辨率年代地层对比的困境与发展方向  

An Approach to High resolution Chronostratigraphic Correlation

作　　者：吴智勇[1,2] 姜衍文[1,2] 卓壮[1,2] 范英才[3] 林静[3] 王全福[3] 

机构地区：[1]江汉石油学院学报编辑部 [2]辽河石油勘探局冷家油田开发公司 [3]辽河石油勘探局欢喜岭采油厂

出　　处：《江汉石油学院学报》1998年第3期13-17,共5页Journal of Jianghan Petroleum Institute

摘　　要：地层完整性是指地层剖面上保存下来的沉积物所代表的地质时间与该剖面所代表的总时间之比。由于沉积物沉积过程的脉冲性和不连续性，地层剖面的完整性是一个大于０小于１的小数，也就是说，地层剖面或多或少都是不完整的。地层剖面的这一性质对年代地层对比有着极为不利的影响，因为人们通常认为是连续完整的“单相连续”剖面或远洋沉积剖面实际上并不完整；再加上自然界天然物种成种速率的限制，使得以生物地层学为基础的年代地层对比的精度要得到大幅度的提高在近期几乎是不可能的。我们认为，只有以高分辨率事件地层学和全球旋回地层学为基础，综合生物地层学、磁性地层学、化学地层学以及构造地层学研究成果的全息地层学才是今后地层学发展的方向。The completeness of a section is the fraction of time intervals of some specified length (t) that have left a recrods.It has a probability to take a value between one and zero because of pulse and discontinuous nature of sedimentation.The incompleteness of a section generates bad effects on chronostratigraphic correlation,since those sections constituted by pelagic sediments considered as a chronostratigraphic stratotype are not complete.Moreover,the species made rates of natural species are not less than 1 million years,which obstructs the improvement of chronostratigraphic correlation precies.As a result,it is almost impossible to improve precision of stratigraphic correlation.It is suggested that only the holostratigraphy based on the high resolution event stratigraphy and global cyclic stratigraphy and combined with biostratigraphy,magnetostratigraphy,chemostratigraphy and tectonic stratigraphy be future stratigraphy.

关 键 词：年代地层学 高分辨率 地层对比 地层间断 

分 类 号：P534[天文地球—古生物学与地层学]