摘要
<正>目前国内外关于古亚洲洋的俯冲、闭合以及兴蒙造山带的形成与演化仍有着广泛的争议,主要原因在于学者们对同期岩浆岩的岩石成因及构造背景的认识存在分歧。解决问题的关键在于如何区分弧岩浆与非弧岩浆的地球化学特征。内蒙古中部苏尼特右旗-西乌旗一带零散地出露了一套晚石炭世(318-300 Ma)本巴图组玄武岩。该套玄武岩的岩石成因对于限定古亚洲洋的闭合时限,明确兴蒙造山带的演化过程具有重要的意义。本研究以苏尼特右旗查干诺尔玄武岩和西乌旗达青牧场玄武岩为研
引文
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