| 冲绳海槽岩浆源的三分量混合模型 |
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| 引用本文： | 于增慧,翟世奎. 冲绳海槽岩浆源的三分量混合模型[J]. 海洋地质与第四纪地质, 2004, 24(3): 129-133 |
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| 作者姓名： | 于增慧 翟世奎 |
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| 作者单位： | 中国海洋大学,海洋地球科学学院,青岛,266003 |
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| 基金项目： | 国家973重大项目(G2000078503)，国家自然科学基金资助项目(40246024，40306009) |
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| 摘 要： | 综合分析了冲绳海槽玄武岩中微量元素的地球化学特征，发现最少要求三分量混合作用来解释其岩浆源成分，并通过最大方差因子分析估算了3个分量的贡献比例。亏损型地幔是海槽岩浆源的主体，但其中舍有富集型地幔的成分，尤其是海槽中部玄武岩岩浆源中这种富集型地幔成分的特征表现得更为明显。俯冲组分是岩浆源中的另一个主要成分，贡献量为20％左右，是造成海槽区玄武岩中Pb强烈富集的重要原因。
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| 关 键 词： | 冲绳海槽 岩浆源 三分量混合模型 因子分析 |
| 文章编号： | 0256-1492(2004)03-0129-05 |
| 修稿时间： | 2003-12-15 |
THREE-COMPONENT MIXING MODEL OF THE MAGMA SOURCE IN THE OKINAWA TROUGH |
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| YU Zeng-hui,ZHAI Shi-kui. THREE-COMPONENT MIXING MODEL OF THE MAGMA SOURCE IN THE OKINAWA TROUGH[J]. Marine Geology & Quaternary Geology, 2004, 24(3): 129-133 |
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| Authors: | YU Zeng-hui ZHAI Shi-kui |
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| Abstract: | The geochemical features of the trace elements in the basalts in the Okinawa Trough are discussed and the argument that there are at least three components mixing in the magma sources is proposed.By the factor analysis,the contributions of three components are respectively evaluated.The depleted mantle is the dominant component.The contribution of the enriched mantle is also significant,especially to the magma source of those volcanic rocks in the middle of the Trough.The component derived from the subducting makes a contribution of at most 20%,that results in the intensive enrichment of Pb in the basalts in the Trough. |
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| Keywords: | magma source three component mixing model factor analysis the Okinawa Trough |
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