| 陕西榆林侏罗纪煤系基底古侵蚀面的地貌特征及其对富县组沉积作用的控制 |
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| 引用本文： | 葛道凯,杨起.陕西榆林侏罗纪煤系基底古侵蚀面的地貌特征及其对富县组沉积作用的控制[J].沉积学报,1991,9(3):65-73. |
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| 作者姓名： | 葛道凯 杨起 |
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| 作者单位： | 中国地质大学研究生院, 北京 |
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| 摘 要： | 基底古侵蚀面特征是盆地分析的基本参数之-。本文讨论了鄂尔多斯盆地内榆林地区煤系基底古侵蚀面的地貌特征、富县组的沉积特征及二者的关系。研究表明:基底古侵蚀面在工作区东部为潜谷,西部呈潜山,其形态控制着区内沉积相间的配置关系和地层厚度的变化;而潜山、潜谷在盆地中的配置关系则决定着潜谷中总的沉积面貌。
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| 关 键 词： | 基底古侵蚀面 乌审旗潜山 神愉潜谷 配置关系 鄂尔多斯盆地 |
| 收稿时间： | 1989-09-08 |
The Palaeornorphologic Features of the Basement of the Jurassic Coal Measures and Its Control on the Sedimentation of Fuxian Formation in Yulin,Shaanxi |
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| Institution: | China University of Geosciences. Beijing |
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| Abstract: | The palaeomorphologic feature is one of the primary geological parameters in basin analysis. This paper demonstrates the palaeomorphologic features of the basement of the Jurassic coal measures, the depositional characteristics of Fuxian Formation and the relationships between them in Yulin district. Ordos Basin. It has been revealed that there is a buried-valley Shenyu Buried-Valley) in the eastern study area, and a buried-hill (Wushenqi Buried-Hill) in the western. Fuxian Formation, which directly overlies on the basement with 0-131.11 mthick, consists of conglomerate, sandstone, mudstonc. claystone and coal line. The principal components recognized in outcrops and drill cores are alluvial fan. lacustrine beach, small delta, lacustrine, fluvial and swamp deposits. Controlled by the palaeomorphologic relief, the lacustrine environment dominated the eastern study area, the alluvial fan and fluvial environment developed in the northeastern and western parts, and in the transition part, the lacustrine beach and samll delta were deposited. As a whole, the general depositional features of the Shenyu Buried -Valley are determined by the associations between buried-hills and buried-valleys in Ordos Basin. |
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