| 东海早第三纪玄武岩的发现及其区域地幔地球化学成因意义 |
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| 引用本文： | 周新华,鄂莫岚,张剑波.东海早第三纪玄武岩的发现及其区域地幔地球化学成因意义[J].岩石学报,1992(4). |
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| 作者姓名： | 周新华 鄂莫岚 张剑波 |
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| 作者单位： | 中国科学院地质研究所，中国科学院地质研究所，中国科学院地质研究所 北京 100029，北京 100029，北京 100029 |
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| 基金项目： | 国家自然科学基金(949011,4860105) |
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| 摘 要： | 本文首次报道东海陆架拗陷带早第三纪玄武岩的发现及邻区有关玄武岩同位素体系分析结果。初步研究表明东海玄武岩为晚渐新世喷发产物,源自与岩石圈有亲缘关系的富集地幔,EMI-LOMU端元在其源区中起主导作用,其深部很可能具古老大陆基底,这一推论为研究华南地区构造演化提供了新的制约。
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| 关 键 词： | 东海 早第三纪玄武岩 地幔地球化学 |
EARLY TERTIARY BASALT IN EAST CHINA SEA BASIN AND ITS IMPLICATIONS TO REGIONAL MANTLE GEOCHEMISTRY |
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| Zhou Xinhua,E Molan and Zhang Jianbo.EARLY TERTIARY BASALT IN EAST CHINA SEA BASIN AND ITS IMPLICATIONS TO REGIONAL MANTLE GEOCHEMISTRY[J].Acta Petrologica Sinica,1992(4). |
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| Authors: | Zhou Xinhua E Molan and Zhang Jianbo |
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| Abstract: | The results of systematic petrological-geochemical study of the Early Tertiary basalt from a drill hole in the East China Sea show its tholeiitic nature in major chemistry and slight enrichment in REE, The primitive-like Sr isotopes and negative Nd value suggest that the mantle source is dominated by the EMI-LOMU component which is first observed in South China.The overall geochemical pattern implies the dominant role of the mixing processes between EMI and DM components in the source of Early Tertiary basalts and the perservation of the ancient basement in the region. |
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| Keywords: | Basalt Early Tertiary Mantle geochemistry |
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