| 湖平面升降对浅水三角洲前缘砂体形态的影响 |
| |
| 引用本文： | 楼章华,蔡希源.湖平面升降对浅水三角洲前缘砂体形态的影响[J].沉积学报,1998,16(4):27-31. |
| |
| 作者姓名： | 楼章华 蔡希源 |
| |
| 作者单位： | 1 浙江大学地球科学系 杭州 310027; |
| |
| 摘 要： | 三角洲平原上的分流河道通过填积和湖面的频繁波动向湖泊中心方向长距离推进，在浅水三角洲前缘的浅水区发育很有特色的水下分流河道，且在湖面频繁波动过程中，河流、波浪和沿岸流的冲刷作用对沉积物分布起到再改造作用，导致了以水下分流河道砂体为主的三角洲前缘砂体不同程度的席状化。随着气候变得潮湿，湖面相对稳定，季节性、周期性湖面波动的频率、幅度减小，水动力对三角洲前缘砂体的改造和席状化强度减弱。
|
| 关 键 词： | 湖平面升降 浅水三角洲 水下分流河道 砂体席状化 |
| 收稿时间： | 1997-05-06 |
Influence of Lake Level Fluctuation on Sandbody Shapes at Shallow-Water Delta Front |
| |
| Lou Zhanghua,Lu Qingmei,Cai Xiyuan,Dong Baiwan,Zhang Liqing.Influence of Lake Level Fluctuation on Sandbody Shapes at Shallow-Water Delta Front[J].Acta Sedimentologica Sinica,1998,16(4):27-31. |
| |
| Authors: | Lou Zhanghua Lu Qingmei Cai Xiyuan Dong Baiwan Zhang Liqing |
| |
| Institution: | 1 Department of Earth Sciences,Zhejiang University,Hangzhou 310027;2 Daqing Institute of Exploration and Development,Daqing Heilongjiang 163712 |
| |
| Abstract: | At the geologic setting of shallow-water delta.distributary channels on plain palin can stretch into lake very long distance by sediment filling and the lake level frequent fluctuation.developping obvious subaqueous channel at wide shallow water delta front.At the same time,the lake level fluctuation,hydrodynamics,such as channel,wave and offshore current,will change the distribution of sedimentary materials,and results in delta front sandbodies sheetlization ,which mainly occurs in the subaqueous channel sandbodies.Along with the climate become more moist,the frequence and range of lake level fluctuation is also smaller,and the hydrodynamics reworks the distribution of sedimentary materials on delta front and sandbody sheetliation become weaker at the same time. |
| |
| Keywords: | lake level fluctuation shallow-water delta subaqueous distrbutary channel sheetlization of sandbodies |
| 本文献已被 CNKI 维普 等数据库收录！ |
| 点击此处可从《沉积学报》浏览原始摘要信息 |
| 点击此处可从《沉积学报》下载免费的PDF全文 |
|
