| 早第三纪济阳湖盆的形成和演变 |
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| 引用本文： | 张宝民,任森厚.早第三纪济阳湖盆的形成和演变[J].地理研究,1992,11(4):28-37. |
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| 作者姓名： | 张宝民 任森厚 |
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| 作者单位： | 北京师范大学 |
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| 摘 要： | 在构造和气候的综合作用下,本区在早第三纪成为一个大型裂谷湖盆,并在沙四、沙三和沙一期因受古太平洋海泛影响而具有"近海"湖盆的特征,其演变经历了初始形成-强烈扩张-晚期扩张-收缩干涸四个阶段,构成一个完整的湖侵-湖退旋回和湖泊早期形成-中期扩张-晚期收缩三个亚旋回。
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| 关 键 词： | 早第三纪 济阳裂谷湖盆 形成演化 海泛 |
ON THE FORMATION AND EVOLUTION OF THE JIYANG LAKE-BASIN DURING EARLY TERTIARY |
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| Zhang Baoming,Ren Senhou,Xiao Zongfeng.ON THE FORMATION AND EVOLUTION OF THE JIYANG LAKE-BASIN DURING EARLY TERTIARY[J].Geographical Research,1992,11(4):28-37. |
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| Authors: | Zhang Baoming Ren Senhou Xiao Zongfeng |
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| Institution: | Department of Geography, Beijing Normal University |
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| Abstract: | Tectonism and climatic condition are the most principal factors controlling the formation and evolution of the lake-basin.It is because of their combined action that a great variety of lakes and their sedimentary constructions in ancient and modern,Chinese and foreign are brought about.In this paper,the varieties of paleogeographies at different stages during early Tertiary in the Jiyang lake-basin are reconstructed,mainly based on paleotectonics,paleotopography,the lower Tertiary deposits,paleontology,paleoecology and the results of minor elements and isotope analysis,also with the aids of sporo-pollen data from other researches.In the early Tertiary,NW-SE trending regional tensile stress field and a series of mantle bulges such as Bohai Gulf mantle bulge with triple junction consisting of lower Laohe,Huanghua and Jiyang was formed in Eastern China,because the Pacific plate was subducted northwestwards and the Eastern Asian continental plate margin crept oceanwards.For this reason,the research district became the southern branch of the Bohai Gulf continental rift basin,in which the evolution had mainly gone through four stages including spreading and faulting-down from initial(Kongdian Epoch of early Eocene) to intense(from Shahejie-4 Epoch of middle Eocene to Shahejie-2 Epoch of early Oligocene). |
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