地理学报 ›› 1995, Vol. 62 ›› Issue (5): 447-458.doi: 10.11821/xb199505008

• 论文 • 上一篇    下一篇

黄海南部陆区全新世埋藏潮沙体

陈报章1, 李从先2, 业治铮2   

  1. 1. 徐州师范大学区域发展研究所, 徐州 221009;
    2. 同济大学海洋地质系, 上海 200092
  • 收稿日期:1993-06-01 修回日期:1994-11-01 出版日期:1995-09-15 发布日期:1995-09-15
  • 基金资助:
    国家自然科学基金

A STUDY ON THE HOLOCENE BURIED TIDAL SAND BODIES IN THE SOUTH YELLOW SEA COASTAL LAND

Chen Baozhang1, Li Congxian2, Ye Zhizheng2   

  1. 1. Institute of Regional Development, Xuzhou Normal University, Xuzhou 221009;
    2. Department of Marine Geology, Tong ji University, Shanghai 200092
  • Received:1993-06-01 Revised:1994-11-01 Online:1995-09-15 Published:1995-09-15

摘要: 本文依据8个钻孔样品分析数据和数十个参考钻孔资料,讨论了全新世沉积层序,发现了埋藏潮沙体,并阐述其沉积特征、形成机制和发育演化过程。埋藏潮沙体可区分为潮沙堤、潮沙波和潮沙脊3个亚相,它们是在冰后期海进-海退过程中,随着长江三角洲前展、南偏,长江携来的砂质物质在强潮流作用下依次形成并得以保存在地层中的。现代辐射状潮流沙脊群是埋藏潮沙体的发展延续。

关键词: 沉积层序, 埋藏潮沙体, 沉积特征, 形成机制, 发育演化, 黄海南部陆区

Abstract: Based mainly upon anlysing of eight drill-holes and upon other several dozens ofis paper. It is non-marine facies of Pleistocene that under lay the sediments of Holocene with an unconformity between them. The Holocene sedimentary sequences can be divided into the lower transgressive and the upper regressive ones, consisting of beach facies (contains estuary-bay facies in some part of the studied area), nearshore neritic facies (tidal sand body facies) and tidal flat facies. It is obvious that facies change horizontally. It merits notice that the nearshore neritic facies is composed of fine sands or silty fine sands in all drill-holes. Characteristics of the sand bands have been researched about their textures, structures, minerals and microfossils etc. Through comparative sedimentological study with the modern tidal sand ridges in Jianggang, it is found that the buried sand bodies belong to the type of tidal sand body.Tidal sand body refers to the sand body of geomorphological bedform formed by the tide current.Along with the changes in current power and sand source, the bedform appears diffenent shapes, and forms different types of tidal sand bodies.According to the differences in their sedimentological characteristics and microfossils, the buried tidal sand bodies can be distiguished into three types: Ⅰ) nearshore tidal sand bars, Ⅱ ) tidal sand waves. and Ⅲ ) nearshore tidal sand ridges. They correspond respectively to the sand banks discribed by Stride (1982) and Caston (1972), the sand waves discribed by Stride (1982) and Belderson (1966) and the sand ribbons discribed by Stride (1982),Kenyon (1970) and Off (1963) or sand ridge discribed by Swift ( 1975 ).

Key words: coasral sedimentary sequences, buried tidal sand bodies, sedimentary characteristics, South Yellow Sea coastal land

中图分类号: 

  • P534.632