›› 1987, Vol. 7 ›› Issue (2): 117-127.

• 论文 • 上一篇    下一篇

韩江三角洲第四系沉积旋回

宗永强   

  1. 广州地理研究所
  • 出版日期:1987-04-30 发布日期:1987-04-30

DEPOSITIONAL CYCLES OF THE QUATERNARY IN THE HANJIANG DELTA

Zong Yongqiang   

  1. Guangzhou Institute of Geography
  • Online:1987-04-30 Published:1987-04-30

摘要: 韩江三角洲位于我国东南沿海,是个物产丰富、经济发达的地区。研究韩江三角洲的地貌发育过程有助于提高对三角洲发育规律的认识,对国土整治和开发也有重要意义。分析韩江三角洲第四系沉积相的旋回变化,是阐明韩江三角洲沉积过程和地貌发育过程的必要前提。韩江三角洲第四系的最大厚度为168.4米,平均厚度为75.4米(图1),约比珠江三角洲的(最大厚度63.6米,平均厚度25.3米)大3倍。韩江三角洲第四系的底界年龄为距今52138±2606年(热释光法)。笔者对本区7个典型钻孔剖面进行了沉积学和年代学综合分析,并对比了木区另外31个钻孔剖面,据此划分了第四系的沉积旋回。

Abstract: Zong Yongqiang (Guangzhou Institute of Geography)The depositional cycles of the Quaternary in the Hanjiang Delta have been distinguished according to the comprehensive facies analysis of 7 tipical bore hole sections and the comparison among the other 13 bore hole sections.The division basis of the depositional cycles,which includes the analysis of fossil diatom,spore-pollen,grain size,trace element and heavy mineral,has been introduced in detail from FIK25 bore hole section as a sample.It has been considered that the Quaternary of the delta is composed of two depositional cycles from land to delta facies and each cycle includes three or four subcy-cles from deita plain to delta front or from delta front to predelta.Regional diversity and chronology of the depositional cycles in this area have been represented and the transgression history of the delta area,which is based on the division result of the depositional cycles,has also been discussed.