刘哲东,刘瑞国,李世龙

• 1:中煤地质集团有限公司

摘要(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Si O2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。

关键词(KeyWords)： 安山岩;埃达克岩;岩石地球化学;格根敖包组;东乌旗

Abstract:

Keywords:

基金项目(Foundation):

作者(Author): 刘哲东,刘瑞国,李世龙

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