| 鄂尔多斯盆地南部延安组水下分流河道型湖泊三角洲体系的沉积构成 |
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| 引用本文： | 夏文臣,雷建喜,王超勇.鄂尔多斯盆地南部延安组水下分流河道型湖泊三角洲体系的沉积构成[J].地球科学,1991(2). |
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| 作者姓名： | 夏文臣 雷建喜 王超勇 |
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| 作者单位： | 中国地质大学地质系
(夏文臣，雷建喜)，中国地质大学地质系(王超勇) |
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| 摘 要： | 采用过程沉积学和成因地层分析相结合的方法,在鄂尔多斯盆地南部延安组中识别出了一种新的湖泊三角洲沉积体系。它与普通河控型湖泊三角洲的主要区别是下三角洲平原部分不是由典型的分流河口坝和前三角洲沉积组成,而是由多分支的水下分流河道、水下决口扇和湖泊沉积组成。在边缘三角洲部分,时常受波浪作用的改造,并形成各种类型的湖滨沉积。本文比较详细地讨论了这类湖泊三角洲的沉积构成及其发育的边界条件。
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| 关 键 词： | 湖泊三角洲 沉积构成 水下分流河道 水下决口扇 成因单位 鄂尔多斯盆地 |
THE DEPOSITIONAL ARCHITECTURE OF THE LACUSTRINE DELTAIC SYSTEM WITH SUBAQUEOUS DISTRIBUTARY CHAN- NEL OF YAN'AN FORMATION IN SOUTHERN ORDOS BASIN |
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| Xia Wenchen Lei Jianxi Wang Chaoyong.THE DEPOSITIONAL ARCHITECTURE OF THE LACUSTRINE DELTAIC SYSTEM WITH SUBAQUEOUS DISTRIBUTARY CHAN- NEL OF YAN''''AN FORMATION IN SOUTHERN ORDOS BASIN[J].Earth Science-Journal of China University of Geosciences,1991(2). |
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| Authors: | Xia Wenchen Lei Jianxi Wang Chaoyong |
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| Abstract: | Based on comprehensive analysis of depositional processes and depositional architecture of Yan'an Formation in Southern Ordos Basin, a new type of lacustrine deltaic system is recognized.Within this deltaic system, the subaqueous deltaic plain facies mainly consists of branching subaqueous distributary channel,subaqueous crevasse splay and lacustrine shale, instead of distributary mouth bar and prodelta, which construct common river-dominated lacustrine delta. Moreover, the marginal deltaic basin facies of this delta is often modified by wave processes, and composed of different lacustrine shoreline sedimentary associations. The paper has discussed the depositional architecture and developed bounder conditions of the lacustrine delta system. |
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| Keywords: | lacustrine delta depositional architecture subaqueous distributary channel subaqueous crevasse splay genetic unit Ordos Basin |
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