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内蒙古东乌旗额吉淖尔一带格根敖包组中性火山岩岩石地球化学特征及成因研究

Zhedong Liu,Ruiguo Liu,Shilong Li

Coal Geology of China（2019）

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Abstract
东乌旗额吉淖尔一带格根敖包组中性火山岩研究表明,区内安山岩地球化学特征显示为一套富铝、低镁、低钾钙碱性系列岩石.岩石SiO2质量分数59.35％～61.49％,Al2O3质量分数15.79％～16.21％,MgO质量分数2.70％～3.13％.Yb质量分数0.99×10-6～1.14×10-6,Y质量分数8.05×10-6～8.74×10-6,Sr质量分数97.79×10-6～481.80×10-6,Sr/Y值85.78～446.11,未见明显Eu异常.显示典型埃达克岩特征,主要为俯冲洋壳熔融形成,表明晚二叠世-早石炭世,调查区大地构造环境为洋壳俯冲环境.
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