| 哀牢山─金沙江裂谷系岩石中镁铁云母成分特征及其岩石学意义 |
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| 引用本文： | 谢应雯,张玉泉.哀牢山─金沙江裂谷系岩石中镁铁云母成分特征及其岩石学意义[J].矿物学报,1995(1). |
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| 作者姓名： | 谢应雯 张玉泉 |
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| 作者单位： | 中国科学院广州地球化学研究所!广州，510640，中国科学院广州地球化学研究所!广州，510640 |
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| 摘 要： | 本区的Mg－Fe云母是富镁黑云母及金云母，MF＞1．35，［Mg／（Mg＋Fe3+＋Fe2+＋Mn）］＞0.65，［（Fe3+＋Fe2+）／（Fe3+＋Fe2+＋Mg）］＜0．4，属于富镁、富碱、高硅、贫铁类型云母。根据Mg－Fe云母的成分及形成的物化条件，表明其寄生岩石属于富碱，浅成一超浅成的幔源岩石。
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| 关 键 词： | 碱性斑岩 富镁黑云母 矿物化学 岩石学意义 哀牢山─金沙江裂谷系 |
COMPOSITIONAL CHARACTERISTICS AND PETROLOGICAL SIGNIFICANCE OF Mg-Fe MICAS IN ALKALIC ROCKS OF THE AILAOSHAN-JINSHAJIANG RIFT SYSTE |
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| Xie Yingwen, Zhang Yuquan.COMPOSITIONAL CHARACTERISTICS AND PETROLOGICAL SIGNIFICANCE OF Mg-Fe MICAS IN ALKALIC ROCKS OF THE AILAOSHAN-JINSHAJIANG RIFT SYSTE[J].Acta Mineralogica Sinica,1995(1). |
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| Authors: | Xie Yingwen Zhang Yuquan |
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| Abstract: | Mg-Fe micas in alkalic rocks of the Ailaoshan-Jinshajiang rift system characterized by MF>1. 35, Mg/ (Mg+Fe3+ + Fe2+ + Mn) ] > 0. 65 and (Fe3++ Fe2+ )/(Fe3+ + Fe2+ + Mg ) ] <0. 4, are Mg-rich biotites and phlogopites, belonging to the Mg-rich, alkali-rich, silicon-high and iron-poor type. Their chemical compositions and physicochemical conditions of formation show that their host rocks are alkali-rich,hypabyssal-ultrahypabyssal mantle-derived rocks. |
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| Keywords: | Mg-rich biotite mineral chemistry alkali-porphyry Ailaoshan-Jinshajiang rift system |
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