| 岚皋碱性镁铁-超镁铁质潜火山杂岩中金云角闪辉石岩类地幔捕虏体矿物学特征 |
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| 引用本文： | 黄月华.岚皋碱性镁铁-超镁铁质潜火山杂岩中金云角闪辉石岩类地幔捕虏体矿物学特征[J].岩石学报,1993,9(4). |
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| 作者姓名： | 黄月华 |
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| 作者单位： | 西北大学地质系 西安 |
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| 基金项目： | 国家自然科学基金(49192201) |
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| 摘 要： | 金云角闪辉石岩类捕虏体产于扬子板块北缘岚皋县境的早古生代碱性镁铁质-超镁铁质潜火山杂岩中,它们的典型矿物组成为单斜辉石、角闪石、金云母、磷灰石和钛铁矿。捕虏体岩石具粗-细粒等粒结构、板状等粒结构、三联点结构、碎裂结构和肯克带结构,交代结构十分发育。岩石产状、结构和矿物成分特征研究表明,金云角闪辉石岩类捕虏体是地幔交代作用产物,可能代表了该区碱性镁铁质-超镁铁质潜火山杂岩的源区岩石。
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| 关 键 词： | 金云角闪辉石岩 地幔捕虏体 地幔交代作用 扬子板块 岚皋 |
MINERALOGICAL CHARACTERISTICS-OF PHLOGOPITE-AMPHIBOLE-PYROXENITE MANTLE XENOLITHS INCLUDED IN THE ALKALI MAFIC-ULTRAMAFIC SUBVOLCANIC COMPLEX FROM LANGAO COUNTY,CHINA |
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| Huang Yuehua.MINERALOGICAL CHARACTERISTICS-OF PHLOGOPITE-AMPHIBOLE-PYROXENITE MANTLE XENOLITHS INCLUDED IN THE ALKALI MAFIC-ULTRAMAFIC SUBVOLCANIC COMPLEX FROM LANGAO COUNTY,CHINA[J].Acta Petrologica Sinica,1993,9(4). |
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| Authors: | Huang Yuehua |
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| Abstract: | The phlogopite-amphibole-pyroxenite mantle xenoliths, occurring in early Palaeozoic alkali mafic-ultramafic subvolcanic complex in Langao County on the northern margin of Yangtze Plate, are composed of clinopyroxene, amphibole, phlogopite, apatite and illmenite. The rocks of xenoliths usually have coarse-fine granulitic, slab-granulitic, triplepoints, cataclastic and kink band textures with strongly developed the metasomatic textures. The studies on the characteristics of rocks and of mineral compositions show that the phlogopite-amphibole-pyroxenite xenoliths are the product of mantle metasomatism and they possibly represent the source of alkali mafic-ultramafic subvolcanic complex in this area. |
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| Keywords: | Phlogopite-amphibole-pyroxenite Mantle Xenoliths Mantle Metasomatism Yangtze Plate Langao County |
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