新疆东准噶尔克拉麦里蛇绿岩地球化学:洋脊俯冲的产物

刘希军 许继峰 侯青叶 白正华 雷敏. 新疆东准噶尔克拉麦里蛇绿岩地球化学:洋脊俯冲的产物[J]. 岩石学报, 2007, 23(7): 1591-1602.
引用本文: 刘希军 许继峰 侯青叶 白正华 雷敏. 新疆东准噶尔克拉麦里蛇绿岩地球化学:洋脊俯冲的产物[J]. 岩石学报, 2007, 23(7): 1591-1602.
LIU XiJun, XU JiFeng , HOU QingYe, BAI ZhengHua,LEI Min. Geochemical characteristics of Karamaili ophiolite in east Junggar, Xingjiang: products of ridge subduction[J]. Acta Petrologica Sinica, 2007, 23(7): 1591-1602.
Citation: LIU XiJun, XU JiFeng , HOU QingYe, BAI ZhengHua,LEI Min. Geochemical characteristics of Karamaili ophiolite in east Junggar, Xingjiang: products of ridge subduction[J]. Acta Petrologica Sinica, 2007, 23(7): 1591-1602.

新疆东准噶尔克拉麦里蛇绿岩地球化学:洋脊俯冲的产物

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    国家杰出青年基金项目(40425003)资助.张旗研究员和《岩石学报》匿名审稿专家对本文的初稿提出了建设性的修改意见,一并表示感谢.

Geochemical characteristics of Karamaili ophiolite in east Junggar, Xingjiang: products of ridge subduction

  • 新疆东准噶尔克拉麦里蛇绿岩中的镁铁质岩兼具有洋中脊玄武岩(MORB)和岛弧拉斑玄武岩(IAB)的特征,岩石地球化学特征表现为轻稀土(LREE)亏损、平坦或略微富集,不同程度地亏损高场强元素(HFSE)而富集大离子亲石元素(LILE),成分上非常相似于受洋脊俯冲影响的Chile Ridse和Cocos Ridse玄武岩。可以认为其可能形成于受洋脊俯冲影响的岛弧或弧前扩张环境。相对较高的εNd(t)(7.2—9.8)、低Nb/Zr、Ta/Yb比值,说明在洋脊俯冲的影响下,其源区可能存在有至少三种组分:弧下地幔、来自消减板片流体和俯冲沉积物、MORB地幔。
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修回日期:  2007-02-26
刊出日期:  2007-07-31

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