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。
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.
出处
《矿物学报》
CAS
CSCD
北大核心
1995年第1期82-87,共6页
Acta Mineralogica Sinica
关键词
碱性斑岩
富镁黑云母
矿物化学
岩石
裂谷系
Mg-rich biotite
mineral chemistry
alkali-porphyry
Ailaoshan-Jinshajiang rift system
