基于Fisher算法对现代黄河三角洲叶瓣垂向环境演变的初步验证

The preliminary verification of the modern Yellow River Delta's vertical environment evolution based on Fisher algorithm

黄河三角洲沉积环境复杂,自1855年以来形成多个三角洲叶瓣,为了验证Fisher算法在黄河三角洲沉积环境划分中的积极作用,在对取自黄河三角洲的柱状沉积物进行粒度分析的基础上,使用Fisher 算法并借助 DPS 软件,对钻孔沉积物垂直剖面进行初步划分,同时与通过其他传统方法划分的沉积层序进行对比。结果表明：通过 Fisher 算法可以将研究区的沉积物划分为3层,分别为1.1-5.7,5.7-18.1及18.1 m以下,地层的分段结果与他人的研究结果相吻合。因此,采用Fisher算法对黄河三角洲沉积物进行层序划分是可行的。

The Yellow River Delta has a complex sedimentary environment, forming 12 delta lobes since 1855. In order to verify the effect of Fisher algorithm on the division of sedimentary environment in the Yellow River Delta, this paper divided the sedimentary environment of the core drilling from the Yellow River Delta by using the Fisher algorithm and Data Processing System （DPS） software, and compared the results with those divided by other tradi-tional methods. The results showed that the deposits could be divided into three layers： 1.1-5.7 m, 5.7-18.1 m, and below 18.1 m, which coincided well with the results of other reports. Therefore, using Fisher algorithm to divide the sedimentary strata in the Yellow River Delta is feasible.