地理研究

地理研究 ›› 1996, Vol. 15 ›› Issue (2): 84-91.doi: 10.11821/yj1996020011

• 论文 • 上一篇    下一篇

海南岛潮汐汊道的现代沉积特征研究*

邵全琴1, 王颖2, 赵振家3   

  1. 1. 首都师范大学地理系 北京 100073;
    2. 南京大学大地海洋科学系 南京 210093;
    3. 中国科学院国家计委地理研究所 北京 100101
  • 收稿日期:1995-10-13 修回日期:1996-02-28 出版日期:1996-06-15 发布日期:1996-06-15
  • 基金资助:
    * 南京大学海岸与海岛开发国家试点实验室支助

A STUDY ON SURFACE SEDIMENTRY CHARACTERISTIC OF TIDAL INLETS IN HAINAN AN ISLAND

Shao Quanqin1, Wang Ying2, Zhao Zhenjia3   

  1. 1. Department of Geography, Capital Normal Uniuersity Beijing 100037;
    2. The department of Geo & Ocean Sciences, Nanjing Uniuersity Nanjing 210093;
    3. Institute of Geography, Chinese Academy of Sciences Beijing 100101
  • Received:1995-10-13 Revised:1996-02-28 Online:1996-06-15 Published:1996-06-15

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摘要： 海南岛存在着大量港湾溺谷型和砂坝泻湖型潮汐汊道。本文以两类潮汐汊道的典型──三亚砂坝泻湖型潮汐汊道和洋浦港湾溺谷型潮汐汊道为例,分析了两类潮汐汊道的成因和地貌发育体系;研究了两类潮汐汊道的现代沉积特征(粒度、重矿、地球化学、有孔虫);对比了两类潮汐汊道的发育模式和沉积模式;探讨了两类潮汐汊道的稳定性。

关键词: 潮汐汊道, 沉积模式, 沉积特征

Abstract: There are many bay-drowned-valley tidal inlets and Sandbar-lagoon tidal inlets in Hainan island.This paper selected two tipical deputies──Yanpu Bay-drowned-valley tidal inlet and Sanya sandbar-lagoon tidal inlet, analysed and compared their geomorphological structure and surface sedimentation.and got some conclutions:(1) The difference and the similarities of developmental models about bay-drowned-valley tidal inlet and sandbar-lagoon tidal inlet:(a) The bay-drowned-valley tidal inlet system has three geomorphological units──tidal inlet and its flood tidal delta, ebb tidal delta.and so does sand bar-lagoon tidal inlet system; (b) The developmental scale of bay-drownedvalley tidal inlet is greater than that of Sanya sandbar-lagoon tidal inlet; (c) The developmental coefficients of flood tidal delta and ebb tidal delta of Yanpu tidal inlet are 0.12 and 0.44 respectively,those of Sanya tidal inlet are 1 and 2.8 respectively.(2) The difference and similarities of sedimentary models about bay-drowned-valley tidal inlet and sandbar-lagoon tidal inlet:(a) In Yanpu baydrowned-valley tidal inlet, the grain size of sediments in tidal inlet is smaller than that on ebb tidal delta and flood tidal delta.In Sanya sandbar-lagoon.the grain size of sediments is greater than that on ebb tidal delta and flood tidal delta; (b) The grain size of sediments on all geomorphological units of bay-drowned-valley tidal inlet system is smaller than that of sandbar-lagoon tidal inlet system;(c) The heavy mineral contents and ZTR of sediments in Yanpu bay-drowned-valley tidal inlet are higher than those in Sanya sand bar-lagoon tidal inlet:(d) The heavy mineral combinations of sediments on bay-drowned-valley inlet and its ebb delta and flood tidal delta are different.The heavy mineral combinations of sediments on sandbar-lagoon tidal inlet and its ebb delta and nab tidal delta are the same; (e) The foraminifer genus-Ammonia and Elphdium are common in both of the two type tidal inlets; (f) The sediments of Sanya Yuzan stream outlet have many Nummulites and Cellanthas, but that in the Yanpu area has no such materials.(3) The stability of bay-drowned-valley tidal inlet in better than that of sand-bar-lagoon tidal inlet.

Key words: Tidal inlet, Sedimentation model, Sedimentation characteristic

PACS: 

  • P931