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冰川冻土 ›› 1983, Vol. 5 ›› Issue (2): 47-53.

• 研究论文 • 上一篇    下一篇

冰碛物的粒度参数特征及其与沉积环境的关系

武安斌   

  1. 兰州大学地质地理系
  • 收稿日期:1982-02-24 出版日期:1984-05-25 发布日期:2012-04-26

THE CHARACTERISTICS OF GRAIN-SIZE PARAMETERS OF TILL AND THEIR RELATION TO SEDIMENTARY ENVIRONMENTS

Wu Anbin   

  1. Department of Geology and Geography, Lanzhou University
  • Received:1982-02-24 Online:1984-05-25 Published:2012-04-26

摘要: 粒度是碎屑沉积物(岩)最重要的结构特征。粒度性质主要受沉积介质、营力强度的控制,与沉积物形成的环境关系极为密切。因而,粒度分析资料已被广泛用来研究沉积岩的成因,成为研究沉积环境的重要途径之一。

Abstract: Based on the sizing of modern tills,some principal characteristics of grain size parameters of the sediments and their relation to sedimentary environment are discussed in this paper. The tills are of multipeak form in size frequency curve and very poor sorting of grain size,such as (δ1>2, SK1>0 or <0, and Kg = 0.53-0.73. It is suggested that the characteristics of size distribution of tills are of importance for studying the sedimentary environment and for identifying the genetic type of ancient tills.