| 豫西新生代基性火山岩地球化学特征及源区性质 |
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| 引用本文： | 周文戈,张本仁.豫西新生代基性火山岩地球化学特征及源区性质[J].矿物岩石,1998,18(3):51-57. |
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| 作者姓名： | 周文戈 张本仁 |
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| 作者单位： | 中国科学院地球化学研究所，中国地质大学（武汉）地球科学学院 |
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| 基金项目： | 国家自然科学基金,地矿部重大基础项目 |
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| 摘 要： | 豫西新生代基性火山岩主要为粗面玄武岩，少量碱玄岩和玄武岩。其地球化学特征表明该区基性火山岩基本代表了幔源原始岩浆的成分，结晶分异作用及地壳物质混染作用并未对本区基性火山岩产生明显影响。初步的研究表明，本区基性火山岩是富集型地幔熔体和亏损型地幔熔体混合的产物。
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| 关 键 词： | 基性火山岩 球化学特征 源区 豫西 |
GEOCHEMICAL CHARACTERISTICS AND THE PROVENANCE OF CENOZOIC BASIC VOLCANIC ROCKS IN WESTERN HENAN PROVINCE,CHINA |
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| Zhou Wenge,Zhang Benren,Zhao Zhidan,Xie Hongsen.GEOCHEMICAL CHARACTERISTICS AND THE PROVENANCE OF CENOZOIC BASIC VOLCANIC ROCKS IN WESTERN HENAN PROVINCE,CHINA[J].Journal of Mineralogy and Petrology,1998,18(3):51-57. |
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| Authors: | Zhou Wenge Zhang Benren Zhao Zhidan Xie Hongsen |
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| Institution: | Zhou Wenge 1 Zhang Benren 2 Zhao Zhidan 1 Xie Hongsen 1 |
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| Abstract: | Geochemical characteristics and the provenance of the Cenozoic basic volcanic rocks from Western Henan province are studied in this paper. Cenozoic basic volcanic rocks in Western Henan are mainly trachybasalts, tephrites and basalts, which enrich in LREE and incompatible trace elements. The trachybasalt is predominant in these rocks. The chemical characteristics of these rocks indicate that these rocks probably represent the primary magma that derived by small degree melting of mantle rocks. The fractional crystallization and crustal rock assimilation during the magma evolution had little effect on the chemical composition of this magma. Based on its isotopic features, the provenances of these volcanic rocks is analyzed. It is believed that Cenozoic basic volcanic rocks of this area are the mixture of the melts from the Depleted Mantle (DM) and the Enriched Mantles (EMI and EMII). |
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| Keywords: | basic volcanic rocks geochemical characteristics provenance Western Henan |
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