| 女山火山岩及其中高压巨晶形成的温压条件 |
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| 引用本文： | 李有柱.女山火山岩及其中高压巨晶形成的温压条件[J].地球科学与环境学报,1996(4). |
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| 作者姓名： | 李有柱 |
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| 作者单位： | 西安地质学院资源与材料工程系 |
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| 摘 要： | 安徽女山玄武岩属于钢质系列的强碱性玄武岩，它包括碧玄岩、碱性橄榄玄武岩和霞石岩、根据玄武岩的Ｍｇ值（１００Ｍｇ／（Ｍｇ＋Ｆｅ２＋））和高Ｎｉ含量，以及其中含丰富的幔源包体．说明女山玄武岩岩浆是分异程度很低的接近原生的岩浆。本区玄武岩还含有丰富的普通辉石巨晶和歪长石巨晶，而石榴石巨晶罕见。本文从矿物学、岩石学、物理化学（特别是热力学）观点出发，对本区玄武岩和高压巨晶的特征和形成的温压条件进行了研究。
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| 关 键 词： | 女山 玄武岩 高压巨晶 温压计算 |
THE P-T CONDITION OF FORMATION OF NUSHAN VOLCANIC ROCKS AND THEIR HIGH-PRESSURE MEGACRYSTS |
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| Li Youzhu.THE P-T CONDITION OF FORMATION OF NUSHAN VOLCANIC ROCKS AND THEIR HIGH-PRESSURE MEGACRYSTS[J].Journal of Earth Sciences and Environment,1996(4). |
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| Authors: | Li Youzhu |
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| Abstract: | Nushan(Anhui Province)cenozoic basaltic lavas belong to strong alkali basalts of sodium series. Theyconsist of basanite, alkali-olivine-basalt and nephelinite. Mg-value 100 Mg/ (Mg Fe2-)] and high Ni contentof the lavas and their abundant mantle derived nodules as well as other characteristics suggest that Nushanbasaltic magma may represent near -primary magmas with lowdegree differentiation. The basalts in this region also contain abundant megacrysts of augite and anorthoclase and rare megacrysts garnet. This paper dealswith the temperature and pressure conditions of formation of the basalts and high-pressure megacrysts in theregion in the light of minerology, petrology, phisico-chemistry (especially themodynamics). |
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| Keywords: | Nushan basalt high-pressure megacryst thermobarometric calculation |
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