| 黄河水下三角洲沉积厚度、沉积速率及砂体形态 |
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| 引用本文： | 李广雪,薛春汀.黄河水下三角洲沉积厚度、沉积速率及砂体形态[J].海洋地质与第四纪地质,1993,13(4):35-44. |
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| 作者姓名： | 李广雪 薛春汀 |
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| 作者单位： | 地质矿产部海洋地质研究所，地质矿产部海洋地质研究所 青岛 266071，青岛 266071 |
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| 摘 要： | 本文通过多年水下实测剖面对比,对黄河水下三角洲现今活动叶瓣沉积厚度、沉积速率和砂体形态进行了研究。厚度分布等值线呈椭圆形,长轴与海岸平行。口门处沉积速率最大,平均最高值可达240cm/a之多,前三角洲沉积速率小于30cm/a,平均约15cm/a,三角洲侧缘小于50cm/a,平均约30cm/a。三角洲叶瓣砂体成分受物源控制,主要由粗粉砂组成。通过与世界六种典型三角洲砂体模式对比,认为黄河三角洲叶瓣砂体有其特殊性,代表具高密度流的三角洲砂体特征。
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| 关 键 词： | 水下三角洲 厚度 沉积速率 砂体形态 砂体模式 |
SEDIMENT THICKNESS,SEDIMENTATION RATE AND SILT BODY SHAPE OF THE YELLOW RIVER SUBAQUEOUS DELTA LOBE |
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| Li Guangxue,Xue Chunting.SEDIMENT THICKNESS,SEDIMENTATION RATE AND SILT BODY SHAPE OF THE YELLOW RIVER SUBAQUEOUS DELTA LOBE[J].Marine Geology & Quaternary Geology,1993,13(4):35-44. |
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| Authors: | Li Guangxue Xue Chunting |
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| Abstract: | Sediment thickness isopleth of subaqueous delta of the Yellow River is of the ellipse shape. Its long axis parallels to the coastal line and the principal axis of tidal current, proving that the tidal current plays an important role in sediment distribution. Sedimentation rate has its highest value in the river mouth area,about 240cm/a or more. Sedimentation rate was less than 30cm/a in the prodelta with a mean rate of 15cm/a,and less than 50cm/a in the delta lateral area with a mean rate of 30cm/a. The grain size and form of sand body in the delta are controlled by substance resource mainly made up of coarse silts. We have found that the Yellow River deltaic sand body presents a sand body model characteristic of the Yellow River delta with high silt content. |
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| Keywords: | subaqueous delta thickness sedimentation rate sand body form sand body model |
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