极地研究

极地研究

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南极半岛周边海域表层沉积物粒度分布特征及其环境指示意义

王春娟1,2 陈志华1 李传顺1 杜德文1 闫仕娟1 朱志伟1   

  1. 1国家海洋局第一海洋研究所，山东青岛 266061 ; 2中国地质大学（北京），北京
  • 出版日期:2014-03-30 发布日期:2014-03-30

DISTRIBUTION OF SURFACE SEDIMENTS IN THE SEA AREA SORROUNDING THE  ANTARCTIC PENINSULA AND THEIR SEDIMENTARY ENVIRONMENTAL SIGNIFICANCE

Wang Chunjuan1,2, Chen Zhihua 1, Li Chunshun1, Du Dewen 1, Yan Shijuan 1, Zhu Zhiwei1   

  1.  
    1The First Institute of Oceanography, SOA’ Qingdao’ 266061;
    2 China University of Geosciences(Beijing), Beijing’ 100083
  • Online:2014-03-30 Published:2014-03-30

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1572

被引次数

2

摘要： 基于南极半岛周边海域表层沉积物调查以及收集资料，分析表层沉积物粒度数据研究沉积物类型和分布特征，探讨沉积物的变化规律。南极半岛周边海域的沉积物类型比较丰富，主要分为四大类：砾质、砂质、粉砂质以及泥质沉积物；根据不同的水深和地貌单元可分为陆架（或岛架）碎屑沉积物、陆坡（或岛坡）沉积物和深海沉积物。研究区沉积物属于冰海沉积物，又可划分为残副冰碛物和混合副冰碛物。沉积物的搬运介质以冰川、冰筏为主，海流对沉积物的影响较为明显，沉积物类型随地形变化而呈有规律的分布。

关键词: 南极半岛, 表层沉积物, 粒度特征, 环境意义

Abstract: Based on the investigations and the data processing on the surface sediments in the surrounding sea area of the Antarctic Peninsula, we analyzed grain compositions to study the types and the distributions, to discuss the variety of the deposits. The samples taken from the study area contain gravel, sand, silt and clay. According to bathymetry and morphology, the area is characterized by neritic, hemi-pelagic and pelagic deposits. The glacial-marine sediments can be divided into two types: residual paratill and compound paratill, which are primarily transported by glacier and ice-rafted. Effect of ocean currents on the deposition is more obvious, and the types of the deposits distribute regularly with the terrain variations.

Key words: Antarctic Peninsula, surface sediments, grain size, environmental significations