Earth Science Frontiers ›› 2012, Vol. 19 ›› Issue (5): 187-194.

• Article • Previous Articles     Next Articles

Chemical characteristics of high magnesian andesites in the Neoarchean Wutai Greenstone Belt.

  

  1. 1.College of Resources, Beijing Normal University, Beijing 100875, China
    2. Langfang Branch of PetroChina Research Institute of Petroleum Exploration and Development, Langfang 065007, China
    3. China University of Geosciences（Beijing）, Beijing 100083, China
    4. Shanxi Provincial Institute of Geological Survey,Taiyuan 030001, China
    5. Tianjin Institute of Geology and Mineral Resources,Tianjin 300170, China
  • Received:2012-03-06 Revised:2012-05-10 Online:2012-09-10 Published:2012-09-10

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Abstract:

In the light of a new classification of high magnesian andesite (HMA) this paper deals with the chemical characteristics of HMAs developed in the Neoarchean Wutai Greenstone Belt, and the HMAs have the similar chemical characteristics with the experimental HMA melts and the typical HMAs in nature: such as the HMAs from Chichijima and Setouchi areas of Japan. Recognition of the HMAs in the Neoarchean Wutai Greenstone Belt suggests the Greenstone Belt to be formed in the setting of oceanic subduction, and thus, the plate tectonic theory may also be applicable in Neoarchean.

Key words: High Magnesian Andesites(HMA), Wutai Greenstone Belt, Neoarchean, plate tectonic theory

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