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地质科学  1996, Vol. Issue (3): 287-296    DOI:
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东营凹陷沙河街组生物扰动构造半定量分析试验
王慧中
同济大学海洋地质系开放实验室, 上海, 200092
SEMI-QUANTITATIVE ANALYSIS OF BIOTURBATION IN SHAHEJIE FORMATION,DONGYING DEPRESSION
Waug Huizhong
Department of Marine Geology, Tongji University, Shanghai 200092
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摘要 根据东营凹陷沙河街组若干层段保存遗迹化石的形态、分异度、潜穴大小、密度、潜穴生成次序与相互叠复程度及原生沉积构造清晰度等指标,半定量地估算了它们的生物扰动指数,绘制了指数曲线图和直方图;在详尽分析生物遗迹组构基础上编制了组构分解图。
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王慧中
关键词遗迹化石   生物扰动指数   生物遗迹组构   生物扰动构造半定量分析   东营     
Abstract: Drawing up some new graphs for the description and analysis of the bioturbation and the cnnofabrites using semi-quantitative analysis methods are used in several sections of Shahejie Formation, Dongying Depression in Shengli Oil Field.Based on various indicators of bioturbation, such as burrows shape and size, burrow abundance and diversity, amount of burrow overlop and the slzarpncss of original sedimentary fabrics, the biaturbation index, in wluch a descriptive grade is assigned to the degree of bioturbation, can be determined. Accordingly,some curvm and histograms of bioturbatirni index in studied sections here Have been drawn. These graphs demonstrate some subtle differences in enmronmental parameters, such as sedimentation rate, benthic oxygen level and micro-hiaius surface, showing details of environmental evolution.The ichnofabrics cnntitnent diagrams in some studied cores can represent various features in ichnotaxa, type, size, diversity and order of emplacement on the same diagram, which casually and clearly portray details about ichnollbrics so that comparative studies can be carried out. This is very useful for those sections with comnlicatcd ichnnfabric contituents in facics analysis.It is more effective if both of bioturbation index curve and ichnofabric diagram for the same section are used in enmronmental analysis. The former can synthetically indicate the general trend of bioturbation and the latter can take sonic parameters,such as the icbnataxa. size, diversity and the burrow ordering, to allow a murr complete description crf the ichnofabric. Therefore, this semi-quantitative analysis method of bioturbation will be one of the important tools for the geological logging in petroleum exploration it is popularized in the future.
Key wordslcfynofossil   Bioturbakion index   lchnofabric constituent   Semi-quantitative analysis of biotubation   
收稿日期: 1994-05-03;
引用本文:   
王慧中. 1996, 东营凹陷沙河街组生物扰动构造半定量分析试验. 地质科学, (3): 287-296.
Waug Huizhong. SEMI-QUANTITATIVE ANALYSIS OF BIOTURBATION IN SHAHEJIE FORMATION,DONGYING DEPRESSION[J]. Chinese Journal of Geology, 1996, (3): 287-296.
 
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