Position: Home > Articles > THE DIVISION OF SEDIMENTAL STAGES AND IT’S SIGNIFICANCE OF ZL CORE IN THE JIANGHAN BASIN BASED ON FISHER OPTIMAL DISSECTION METHOD
Transactions of Oceanology and Limnology
2013
(2)
105-110
基于Fisher算法的江汉盆地钻孔岩芯沉积阶段划分及其意义
作 者：
袁胜元;闫慧;李长安
单 位：
中国地质大学生物地质与环境地质国家重点实验室;许昌学院城市与环境学院;中国地质大学地球科学学院
关键词：
Fisher算法;江汉盆地;沉积阶段划分;水系演化
摘 要：
"Fisher算法"是对有序样品进行最优化分段的1种数学方法。应用有序聚类法中次序不变的特点,以江汉盆地ZL钻孔46个地球化学测试样品为研究对象,在有序聚类的数学理论基础上,借助DPS软件包将钻孔沉积物垂直剖面进行分层。研究结果表明,江汉盆地第四纪以来沉积演化大致经过4个阶段:2.77～2.68Ma B.P.、2.68～2.23Ma B.P.、2.23～1.25Ma B.P.及1.25Ma B.P.以来,4个阶段微量元素比值变化特征揭示了该地区河流由不稳定到成熟水系的演化过程。
译 名：
THE DIVISION OF SEDIMENTAL STAGES AND IT’S SIGNIFICANCE OF ZL CORE IN THE JIANGHAN BASIN BASED ON FISHER OPTIMAL DISSECTION METHOD
作 者：
YUAN Shengyuan 1,2,YAN Hui 1,and LI Changan 2,3 (1.College of Urban Planning & Enviroment Science,Xuchang University,Xuchang 461000,China ; 2.State Key Laboratory of Biogeology and Environmental Geology,China University of Geosciences,Wuhan 430074,China ; 3.Faculty of Sciences,China University of Geosciences,Wuhan 430074,China)
关键词：
Fisher optimal dissection method;Jianghan Basin;stage of sediment;evolution of river system
摘 要：
The Fisher optimal dissection is a method by which an ordered sample is divided optimally.46 geochemical samples were studied considering the clustering results of sequential clusters did not change the sequence of samples,DPS software package was used to divide the dividing sediments of the core ZL.The results seem to show 4sedimental stages in the Quaternary : 2.77～2.68 Ma B.P.,2.68～ 2.23Ma B.P.,2.23～1.25Ma B.P.and 1.25Ma B.P.to present,trace element ratios revealed the evolution process from convective to maturity stage in the Jianghan Basin.
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