Geodynamic significance of "Guangxi-type granite": Answer the question from Wang Yang(2015)
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    Abstract:

    Wang Yang wrote a critique arguing that "Guangxi-type granite" does not contain the petrological and geodynamic significance, the whole-rock Sr and Yb content of granitic rocks cannot be regard as a reliable index to indicate the melting pressure of granitic magma, and the "Sr-Yb" classification of granitic rocks is useless for geodynamic study. The author indicates that granites were formed under different pressures, like adakites and arc magmatic rocks (andesite-dacite-rhyolite). Wang Yang thinks that granitic magma can be formed either in the lower crust or in the middle crust, and also believes that granitic magma can be formed by basic magma fractional crystallization. Because of the lack of field evidence, the author does not agree with these arguments. The Sr and Yb enriched Guangxi-type granites indicates that there is no garnet and plagioclase in residual phases. Wang Yang quotes different opinions from different scholars, but these opinions have nothing to do with the concept of the Guangxi-type granites proposed by the author. Therefore, Wang Yang fails to deny the author's understanding concerning Guangxi-type granite based on his arguments.

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张旗,2015,“广西型花岗岩”的地球动力学意义——答汪洋(2015)的质疑[J].岩石矿物学杂志,34(3):440~444. ZHANG Qi,2015,Geodynamic significance of "Guangxi-type granite": Answer the question from Wang Yang(2015)[J]. Acta Petrologica et Mineralogica,34(3):440~444.

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History
  • Received:January 09,2015
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  • Online: May 29,2015
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