地理科学 ›› 1990, Vol. 10 ›› Issue (2): 97-106,191.doi: 10.13249/j.cnki.sgs.1990.02.97

• 论文 •    下一篇

辽东半岛的黄土及其沉积环境

吕金福, 李志民   

  1. 东北师范大学地理系, 长春
  • 出版日期:1990-03-20 发布日期:1990-03-20

LOESS AND ITS SEDIMENTARY ENVIRONMENT IN LIAODONG PENINSULA

Lu Jinfu, Li Zhimin   

  1. Department of Geography, Northeast Normal University, Changchun
  • Online:1990-03-20 Published:1990-03-20

摘要: 辽东半岛的黄土粒度组成中,细砂的含量较多,粉砂的含量相对减少。黄土的物源较为复杂,既有来自于内陆的粉尘,又有来自附近海域的粉尘,还有经暂时流水搬运的,来自于低山丘陵区的基岩风化物。黄土地层剖面变化,说明了当时的环境特征。

Abstract: The loess in Liaodong Peninsula is mainly distributed below 70 meters underground along the Bohai coastal areas,with the thickness of 10-15 metres. The loess in Liaodong Peninsula can be classified into pro-Lishi stage,Lishi stage and Malan stage.The period of pro-Lishi loess is from the Pliocene to the early Pleistocene.The loess of Lishi stage can be divided into the lower Lishi loess and the upper Lishi loess.And Malan loess stage is the later period of the Pleistocene. The silver sand content in the loess of Liaodong Peninsula is much more than the silt content.However,there is the tendency that silt content gradually increases from the lower part Io the upper part of both Lishi and Malan loess. The major minerals in the loess are light ones,such as quarts,feldspar,etc. The source of the loess substances in Liaodong Peninsula are different,some came from the inland of Shandong and Shaanxi provinces,some from the nearby sea areas,and some was brought by rivers from the low mountain and hill areas.