东营港附近海域植硅体特征及其古环境指示意义  

Characteristics of Phytoliths in a Core Near Dongying Harbor and Their Paleo-Environmental Implications

作　　者：南学良 杜军[1] 李培英[1] 刘世昊[1] 李平[1] 

机构地区：[1]国家海洋局第一海洋研究所,山东青岛266061

出　　处：《海洋科学进展》2015年第3期385-393,共9页Advances in Marine Science

基　　金：海洋公益性行业科研专项--黄河三角洲海底浅层标准声学层序与典型灾害地质(20100529-4)

摘　　要：植硅体因其易保存、产量高并且在分类学上的形态差异性等诸多方面的优点而被广泛应用在古环境研究中。本文通过对东营港附近海域GYDY孔不同层位植硅体形态组合特征的分析研究,并依据14 C测年结果,采用有序聚类分析法划分出了4个具有古环境气候指示意义的植硅体组合带,其分别代表4个不同的气候演化时期,揭示了36ka以来东营港古环境经历了干冷-变暖-湿润温暖-温凉的变化过程。通过与青海湖孢粉总浓度曲线与古里雅冰芯δ18 O对比,表明东营港附近海域GYDY孔植硅体特征所反映的环境变化过程与其他地区气候变化拟合性较好,可作为该海域古环境变化的依据与参照。Phytoliths are of some merits such as easy retained,high yields,morphological differences in taxonomy and so on,so they are widely used in the study of paleo-environments.This study analyzed the phytoliths assemblages from different layers of in GYDY core near Dongying harbor,obtained ages for key layers by using 14 C dating method.Then,based on cluster analysis method,these data have been used to divide phytoliths assemblages into 4zones with different paleo-environmental implications,which respond to climate evolution well.Dongying harbor experienced the following paleo-environment evolutional history since 36 ka,cold-dry,warm,warm-humidity and warm-cool in sequence.By comparing curves of phytoliths in the GYDY core,pollen concentration in the Qinghai Lake and δ^18O in the Guliya ice-core,this study showed phytoliths characteristics in the GYDY core could reflect the process of climate change which fits well with inferred climate change from other regions,so they can be used as a reference of studying paleo-environment change.

关 键 词：东营港 GYDY孔 植硅体 古环境 

分 类 号：P618.13[天文地球—矿床学]