| 海南岛昌江灰色片麻岩包体及其地球化学特征 |
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| 引用本文： | 梁新权.海南岛昌江灰色片麻岩包体及其地球化学特征[J].大地构造与成矿学,1998,22(4):346-352. |
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| 作者姓名： | 梁新权 |
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| 作者单位： | 中国科学院长沙大地构造研究所 |
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| 摘 要： | 灰色片麻岩包体出露于海南岛昌江中元古代花岗质岩石中，主要由花岗闪长质-英云间长质片麻岩及其糜棱岩组成，遭受过强烈的剪切作用和变质作用，野外产出与岩石矿物学特点及其地球化学特征均表明灰色片麻岩是正片麻岩，是以片麻岩形式存在的高Al型英云间长岩-花岗间长岩深成岩体。具有轻稀土富集型和轻稀土亏损型两种分配模式，岩石成因复杂，其Nd模式年龄为2735～2791Ma，说明海南岛存在太古宙古陆壳。||关键词##4灰色片麻岩包体;;英云间长岩-花岗间长岩;;地球化学特征;;海南昌江
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| 关 键 词： | 灰色片麻岩包体 英云间长岩-花岗间长岩 地球化学特征 海南昌江 |
GEOLOGICAL AND GEOCHEMICAL CHARACTERISTICS OF THE CHANGJIANG GREY GNEISS XENOLITHS ON HAINAN ISLAND |
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| Abstract: | The Changjiang grey gneiss xenoliths exposed in meso-Proterozoic granitic rocks of Hainan Island consist mainly of tonalitic-granodioritic gneisses. They suffered shearing and metamorphism. Their occurrence in the field, mineralogical and geochemical characteristics indicate that they were orthogneisses or an ancient tonalitic-granodioritic plution which now occur in the form of gneisses and were formed by partial melting of uniformly depleted mantle magma or crystallization differentiation in 2735~2791 Ma. These represent an important tectono-thermal event in the Archeozoic on Hainan Island. |
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| Keywords: | Grey gneiss xenolith tonalite-granodiorite geochemical characteristics Changjiang Hainan Island |
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