| 东营凹陷牛38井始新统沙河街组三段米氏旋回的地层响应 |
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| 作者单位： | 中国石油大学(华东)地球资源与信息学院，中石化胜利油田有限公司地质科学研究院 |
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| 摘 要： | 地球围绕太阳的轨道要素周期性变化引起气候旋回变化,进而影响到地质历史中沉积物及生物面貌的旋回变化。牛38井始新统沙河街组三段旋回地层学研究表明,沉积物和古生物对404.8ka的天文偏心率旋回具有明显的响应特征。在一个偏心率旋回之内,随着地球围绕太阳公转轨道位置的变化,气候由热变冷再变热,古生物属种数量、沉积物粒度出现相应的的旋回变化。若以404.8ka偏心率旋回为单位来划分高频层序,可以保证所划分的地层具有异旋回性和严格的等时性。
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| 关 键 词： | 高频层序 米氏旋回 沙河街组 始新统 东营凹陷 山东 |
STRATIGRAPHIC RESPONSE TO THE MILANKOVITCH CYCLES IN THE MEMBER 3 OF SHAHEJIE FORMATION OF WELL NIU 38 IN THE DONGYING DEPRESSION |
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| Authors: | BIAN Xue-mei ZHANG Hai-feng YAO Yi-min and HE Qing-fang College of Georesources and Information University of Pertroleum Dongying Geological Scientific Research Institute of Shengli Oilfield Company SINOPEC Dongying |
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| Institution: | BIAN Xue-mei 1)2),ZHANG Hai-feng 2),YAO Yi-min 2) and HE Qing-fang 1)2) 1) College of Georesources and Information,University of Pertroleum,Dongying,257061,2) Geological Scientific Research Institute of Shengli Oilfield Company,SINOPEC,Dongying,257015 |
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| Abstract: | Orbital factors of the Earth influenced the paleoclimatic variations, thus brought the periodic varieties of sediments and living organisms. The sediments, fossils and the Milankovitch cycles preserved in the Member 3 of Shahejie Formation of Well Niu 38 in the Dongying Depression show that living organisms and sediments responsed evidently to 404.8ka Milankovitch cycles. In one cycle of 404.8ka, the number of fossils and the grain size of sediments changed gradually along with the variation of the orbital factor. If the 404.8ka cycles are used as the criterion for the division of high-frequency sequences, it can ensure the isochronism of the sequence frame. |
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| Keywords: | Milankovitch cycle high-frequency sequence Shahejie Formation Eocene Palaeogene Dongying Depression Shandong Province |
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