地理研究

地理研究 ›› 1990, Vol. 9 ›› Issue (2): 58-66.doi: 10.11821/yj1990020007

• 论文 • 上一篇    下一篇

穆珠朗玛峰地区土壤中稀土元素的含量和分布

章申1, 孙景信2, 屠树德2, 王玉琦2, 钱琴芳2, 陈冰如2   

  1. 1. 中国科学院国家计划委员会地理研究所;
    2. 中国科学院高能物理研究所
  • 收稿日期:1989-08-10 修回日期:1989-09-26 出版日期:1990-06-15 发布日期:1990-06-15

CONTENT AND DISTRIBUTION OF REE IN THE SOILS FROM MT.QOMOLANGMA REGION

Zhang Shen1, Sun Jingxin2, Tu Shude2, Wang Yugi2, Qian Qinfang2, Chen Binru2   

  1. 1. Institute of Geography, Chinese Academy of Sciences and the State Planning Commission of the People's Republic of China;
    2. Institute of High Energy Physics, Chinese Academy of Sciences
  • Received:1989-08-10 Revised:1989-09-26 Online:1990-06-15 Published:1990-06-15

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12

摘要： 本文论述了珠穆朗玛峯地区土壤中稀土元素的含量,以及它们在土壤中的分布模式,并发现土壤中稀土元素的含量水平在很大程度上受土壤母质的制约。

关键词: 稀土元素, 土壤地球化学, 珠穆朗玛峰地区

Abstract: In Mt,Qomolangma region there is a complete soil zone spectrum from mountain subtropical to alpine frigid landscapes with no or little effect of human activities Studies on content and distribution of REE in soils are based on the systematic sampling from various vertical soil zones of the Mt,Qomolangma region at 1000-6100m a.s.l.by the senior author during the Comprehensive Scientific Expedition of Xizang carried on by Academica Sinica.Eight rare earth elements including La,Ce,Nd,Sm,Eu,Tb,Yb and Lu in soil samples were determined by instrumental neutron activation analysis (INAA).The relative abundance of REE of sample of the soil was obtained from the data normalized by mean values of chondrites and shales respectively.Based on relative abundance patterns of REE,the contents of REE that had not obtained by INAA technique,and the abnormal values of En and Ce in samples were estimated.The result showed that the total REE content in soils from Mt.Qomolangma region ranged from 71.3-230.7 ppm,the average content of REE in these soil is 187.6ppm,which is in agreement with that-of world soil (157.4ppm),Chinese soil (176.8ppm)and soil of USSR (100-210).The total REE content in different soil types ranked as follows,mountain podzolic soil>alpine meadow-steppe soil>subalpine steppe soil>Original alpine meadow soil>subolpine meadow soil>mountain acid burozem>mountain yellow-brown earths.The ratio of light REE to heary REE in soils was from 7.5-10.6,with an average of 9.2.After normalized by mean values of chondrite,the REE patterns for different soil types are very smimlar to each other,as well as to those of typical shales,sedimentary rock of Mt,Qomolangma area.All 12 soils showed negative anomaly of Eu,It is clear that the distribution of REE in soil of the Mt.Qomolangma region depends directly on the character of the underlying rocks and soil formation process.The soil parent matter (horizons C)is the main factor which determines the contents of REF in the soil

Key words: REE, pedogeochemistry, Mt.Qomolangma