| 宁芜地区中生代岩浆岩的成因──岩石学与Nd、Sr、Ph同位素证据 |
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| 引用本文： | 邢凤呜.宁芜地区中生代岩浆岩的成因──岩石学与Nd、Sr、Ph同位素证据[J].岩石矿物学杂志,1996(2). |
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| 作者姓名： | 邢凤呜 |
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| 作者单位： | 安徽省地质科学研究所 |
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| 摘 要： | 宁芜中生代火山盆地产出火山岩与侵入岩。火山岩以玄武粗安岩、粗安岩和粗面岩为主，安山岩和响岩少量，火山岩以高钾富碱为特征，已确定为橄揽安粗岩系。侵入岩以辉长间长珍岩－辉长闪长岩为主，以高钠低硅为特征，并有辉长岩和花岗岩产出。据地质学和Ｎｄ、Ｓｒ、Ｐｈ同位素资料，侵入岩与火山岩属同一个岩浆系列，是碱性玄武岩浆在下地壳经过轻度ＡＦＣ混合后，侵入上地壳，在轻度混染的情况下，经过以结晶分离为主的岩浆分异形成的。
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| 关 键 词： | 中生代，岩浆岩，成因，宁芜地区 |
Petrological and Nd, Sr, Ph Isotopic Evidence for Genesis of Mesozoic Magmatic Rocks in Nanjing-Wuhu Area |
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| Xing Fengming.Petrological and Nd, Sr, Ph Isotopic Evidence for Genesis of Mesozoic Magmatic Rocks in Nanjing-Wuhu Area[J].Acta Petrologica Et Mineralogica,1996(2). |
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| Authors: | Xing Fengming |
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| Abstract: | In the Nanjing-Wuha area Mesozoic volcanic basin there occur volcanic and intrusiverocks. Volcanic rocks are mainly basaltic trachyandesite, trachyandesite, and trachyte, withsmall amounts of andesite and phonolite. Characterized by high potassium and rich alkali, thevolcanic rocks are defined as shoshonite. Dominated by gabbro-diorite porphyrite-gabbro-dior ite, intrusive rocks are characterized by high sodium and low silicon, together with the existence of gabbro and granite. According to geological and Nd, Sr, Pb isotopic data, intrusiverocks and volcanic rocks belong to the same magmatic series formed by magmatic differentiation(mainly crystallization fractionation) in a low-degree hybridization environment when alkalinebasaltic magma intruded into the upper crust after low-degree AFC mixture in the lowercrust. |
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| Keywords: | Mesozoic magmatic rock genesis Ningwu area |
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