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一、前言牙形石是一类已灭绝的海洋微体古生物,在地质历史中从寒武世至三叠世的海洋环境中均有发现。牙形石分布广泛,形态多样,数量众多,演化迅速,是地层学研究中良好分层化石。近年来对牙形石色变指数(CAI值)的研究,对石油地质勘探发挥了重要作用。近年数理统计法在国外已引入了牙形石研究之中,国内这方面的文章尚不多见。采用数理统计方法处理牙形石标本,获得牙形石的形态变异、古环境古生态等信息,对恢复被肢解的牙形石个体,建立器官属及组合带已逐渐被人们所认识。本文以浙江长兴,晚二叠世长兴组剖面为例,采用Q型因子分析法研究该层位牙形石组合带。
I. Preface Condyloma is a type of extinct marine micro-organism that has been discovered in the geological history from the Cambrian to Triassic marine environments. Condonts are widely distributed, diverse forms, large number, rapid evolution, stratigraphic study is a good stratified fossils. In recent years, the research of conodont color change index (CAI) has played an important role in petroleum geology exploration. In recent years, mathematical statistics have been introduced into the study of conodont in foreign countries, the domestic articles in this area are still rare. Using mathematical statistics to process conodont specimens, obtaining conformation of conodont and paleoenvironment of paleoenvironment, etc., it is gradually recognized that conodont restoration and restoration of dislocated condyloma are the only one. In this paper, the Changxing Formation in Zhejiang Province and the Changxing Formation in the Late Permian are taken as an example to study the conodont belt with Q-factor analysis.