| 康定片麻岩岩石化学特征的初步研究 |
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| 引用本文： | 吴根耀,张雯华.康定片麻岩岩石化学特征的初步研究[J].矿物岩石,1990,10(2):23-30. |
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| 作者姓名： | 吴根耀 张雯华 |
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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 北京 100011，北京 100011 |
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| 摘 要： | 川西地区康定片麻岩(原称澄江—晋宁期岩浆岩第Ⅳ期的酸性岩)的主体是富钠质的英云闪长质-奥长花岗质片麻岩(灰色片麻岩);尚有少量花岗质片麻岩,系灰色片麻岩遭受钾质交代而成。其岩石化学特征与太古代花岗地体一致.灰色片麻岩属低铝型,以相对富铁和不具Eu异常为特征。它与川滇交界区晚太古代垭口片麻岩等一起构成川西滇中地区的片麻岩基底.
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| 关 键 词： | 片麻岩 岩石化学 低铝型 花岗质 |
A PRELIMINARY STUDY OF PETROCHEMISTRY FEATURES OF KANGDING GNEISS,WESTERN SICHUAN |
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| Wu Genyao Zhang Wenhua.A PRELIMINARY STUDY OF PETROCHEMISTRY FEATURES OF KANGDING GNEISS,WESTERN SICHUAN[J].Journal of Mineralogy and Petrology,1990,10(2):23-30. |
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| Authors: | Wu Genyao Zhang Wenhua |
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| Abstract: | The main body of Kangding Gneiss is tonalitic-trondhjemitic gneiss(gray gneiss),as well as some the granitic gnciss,product of potassium-feldsparization.The geochemicsl features of former are coincident with those of th Archacan granitic gnciss.It belongs to the low-Al_2O_3type,with relatively higher FeO.Its REE pattern is characterized by having no Eu anomaly and a little increasing Y with SiO_2increased.But the latter shows more typical Calc-alkaline tcndcncy.Kangding Gneiss might be the oldest sialic basement of Kangding-Luding arca.Stretching Southwards,it could connect the Late Archaean Yakou Gneiss and its equivalents in Western Sichuan and Central Yunnan. |
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| Keywords: | grey gneiss Low-Al_2O_3type Granitie gneiss Archaean kangding |
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