Trace element characteristics of the volcanics in the northern Xizang (Tibet)

Ruiying Yang; Zhongxiang Huang; Wanming Deng

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Trace element characteristics of the volcanics in the northern Xizang (Tibet)

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- Trace element characteristics of the volcanics in the northern Xizang (Tibet)
- Nuclear Techniques Vol. 09, Issue 2, (1986)
- 作者机构：
  
  1.中国科学院高能物理研究所
  2.中国科学院地质研究所
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Received：19 March 1984，
  
  Published：1986-02
- 稿件说明：
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Ruiying Yang, Zhongxiang Huang, Wanming Deng. Trace element characteristics of the volcanics in the northern Xizang (Tibet)[J]. Nuclear techniques, 1986, 09(2): 17-20,59.
DOI：

Ruiying Yang, Zhongxiang Huang, Wanming Deng. Trace element characteristics of the volcanics in the northern Xizang (Tibet)[J]. Nuclear techniques, 1986, 09(2): 17-20,59. DOI：

摘要

用仪器中子活化法测定了藏北火山岩微量元素丰度，结果证明藏北蛇绿岩是形成在一个规模不大，存在时间不长的弧后盆地环境内。根据火山岩的层位关系，岩浆来源和微量元素特征把该盆地的地质演化概括为扩张阶段、封闭阶段和造山后阶段。这种认识与区域地质资料相一致。

Abstract

Abundances of trace and rare earth elements from a representative volcanics in the northern Xizang have been measured by instrumental neutron activation analysis. The results indicate that the ophiolitic complex was formed in a small back-arc basin. On the basis of the stratigraphy

magmatic source and geochemical characteristics of volcanics

the evolution process of the northern Xizang back-arc basin may be summarized into three continual periods as following: the expanding

the clossing and post-orogenic periods. Distinct volcanism was occurred in each periods. This hypothesis is consistent with regional geologic data.

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references

邓万明，岩石学研究，第三辑， 1983 年。

汤耀庆和王方国，成都地质学院学报， 3 ， 29 ( 1983 )。

杨瑞英等，核技术， 4 ， 36 ( 1982 )。

邓万明等，岩石学研究，第一辑， 1982 年，第 28 页。

A. Miyashiro , Amer. J. Sci. , 274 , 321 ( 1974 ).

J. A. Pearee and J. R. Cann , Earth Planet Sci. Lett. , 19 , 290 ( 1973 ).

J. A. Pearee et al . , Phil. Trans. R. Soc. Lond. , A300 , 299 ( 1981 ).

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