| 松树沟超镁铁岩和铬铁岩的微量元素及锶氧同位素地球化学研究 |
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| 引用本文： | 张泽军.松树沟超镁铁岩和铬铁岩的微量元素及锶氧同位素地球化学研究[J].矿物岩石,1992(4). |
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| 作者姓名： | 张泽军 |
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| 作者单位： | 西安地质学院 西安 |
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| 基金项目： | 国家自然科学基金(4840006) |
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| 摘 要： | 根据岩石学特征,本文全岩样品被分为三组。各组岩石具有不同的微量元素含量和锶氧同位素组成,还呈现不同的变异特征。各类岩石的Rb,Ba,Nb,Sr等元素含量明显高于原始地幔值。这些特征与其他已发表的资料均反映出超镁铁岩和铬铁岩有地幔残余成因和岩浆结晶成因,以及上涌地幔经历过多期部分熔融和大陆岩石圈中壳幔物质混染作用。
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| 关 键 词： | 地球化学 岩石成因 壳慢混染 地幔热柱 |
ON STUDY OF MICROELEMENTS AND STRONTIUM-OXYGEN ISOTOPES GEOCHEMISTRY OF SONGSHUGOU ULTRAMAFITES AND CHROMITITES |
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| Zhang Zejun.ON STUDY OF MICROELEMENTS AND STRONTIUM-OXYGEN ISOTOPES GEOCHEMISTRY OF SONGSHUGOU ULTRAMAFITES AND CHROMITITES[J].Journal of Mineralogy and Petrology,1992(4). |
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| Authors: | Zhang Zejun |
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| Institution: | Xi'an College of Geology Xian 710054 |
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| Abstract: | The samples in this paper can be divided into three groups according to their petroiogical features. They show different microelement contents and strontium-oxygen isotope abundances,and different variational modeles from each other. Rb,Ba,Nb,Sr contents of all samples are higher than that of primary mantle. The above-mentioned features and other published data suggest that the ultramafites and chromitites belong to mantle-residue genesis and magmatic-cumulate genesis,and complex events of upwelling mantle plume about multiperiod partial meltings and crustal-mantle contaminations in continental lithosphere. |
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| Keywords: | geochemistry petrogenesis crustal-mantle contamination mantle plume |
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