| 山东东营凹陷早第三纪沙一段介形虫丰度的不均匀性及其地质意义 |
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| 引用本文： | 刘传联,丁莲花,洪太元,毕海红,赵泉鸿.山东东营凹陷早第三纪沙一段介形虫丰度的不均匀性及其地质意义[J].微体古生物学报,1994(2). |
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| 作者姓名： | 刘传联 丁莲花 洪太元 毕海红 赵泉鸿 |
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| 作者单位： | 胜利石油管理局地质资料公司，同济大学海洋地质系 |
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| 摘 要： | 东营凹陷四个钻孔（２．下２－观１８、滨２９７、牛１０１、樊１０１）沙河街组一段岩心样品介形虫化石丰度统计表明：１）不同的岩性介形虫化石丰度可以有很大不同；２）同一钻孔垂向上不同层段中介形虫化石丰度也显示出不均匀性；３）在岩心层面上，介形虫化石的分布有六种形式：密集分布、零星分布、簇状分布、条带状分布、虫穴充填、裂缝充填。除前两者外，均显示出层面上化石分布的不均匀性。造成上述化石丰度不均匀性的原因包括生态学和埋葬学两种因素。最后文中讨论了这种化石丰度不均匀性所反映的地质意义。
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| 关 键 词： | 介形虫化石，不均匀性，丰度，沙河街组一段，东营凹陷 |
NONUNIFORMITY IN ABUNDANCE OF OSTRACODA FROM EARLY TERTIARY SHAHEJIE FORMATION IN THE DONGYING DEPRESSION SHANDONG AND THEIR GEOLOGICAL SIGNIFICANCE |
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| Liu Chuan-lian, Ding Lian-hua, Hong Tai-yuan and Bi Hai-hong.NONUNIFORMITY IN ABUNDANCE OF OSTRACODA FROM EARLY TERTIARY SHAHEJIE FORMATION IN THE DONGYING DEPRESSION SHANDONG AND THEIR GEOLOGICAL SIGNIFICANCE[J].Acta Micropalaeontologica Sinica,1994(2). |
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| Authors: | Liu Chuan-lian Ding Lian-hua Hong Tai-yuan and Bi Hai-hong |
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| Abstract: | Statistics on abundance of ostracods have been carried out for samples from the first member of the Shahejie Formation in 4 wells(2-2-18, Bin297,Niul01 and Fanlol) ,Dongying Depression. Results show that: (l)the abundance of ostracods varies in different rocks;(2) the distribution of ostracods is not uniform in various strata of the same well; and (3)the distributional patterns of ostracods on the bedding plane may be close and dense, sporadic, clumped, burrow-filled, striped, or crack-filled.The causes for this nonuniformity include ecological and taphonomic factors. The geological significance of the nonuniformity is also discussed in this paper. |
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| Keywords: | ostracods nonuniformity abundance Shahejie Formation Early Tertiary Dongying Depression |
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