| 乔治王岛菲尔德斯半岛火山岩岩石学特征及岩浆成因与演化 |
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| 引用本文： | 邢光福,金庆民.乔治王岛菲尔德斯半岛火山岩岩石学特征及岩浆成因与演化[J].资源调查与环境,1992(2). |
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| 作者姓名： | 邢光福 金庆民 |
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| 作者单位： | 中国地质科学院南极研究中心
(邢光福)，中国地质科学院南极研究中心(金庆民) |
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| 基金项目： | 地质行业科学技术发展基金资助项目 |
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| 摘 要： | 菲尔德斯半岛出露一套第三纪岛孤火山岩,包括高铝玄武岩、玄武安山岩、及少量安山岩与英安岩,从早到晚可划分为碧玉山段、玛瑙滩段、化石山段和岩块山段四个岩性段.它们属于同一钙碱性岩浆演化系列,其中高铝玄武岩是其它火山岩的母岩.高铝玄武岩的形成过程可分两个阶段:首先是上地幔楔经过20～25％的部分熔融生成原生橄榄拉斑玄武质岩浆,然后原生岩浆再经40％的矿物分离结晶作用(其中橄榄石占30％,单斜辉石占70％)而分异形成高铝玄武岩浆.
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| 关 键 词： | 火山岩 二阶段成因 岩浆演化 南极 |
PETROLOGY, ORIGIN AND EVOLUTION OF VOLCANIC ROCKS IN FILDES PENINSULA, KING GEORGE ISLAND, ANTARCTICA |
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| Xing Guangfu Jin Qingmin.PETROLOGY, ORIGIN AND EVOLUTION OF VOLCANIC ROCKS IN FILDES PENINSULA, KING GEORGE ISLAND, ANTARCTICA[J].Resources Survey & Environment,1992(2). |
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| Authors: | Xing Guangfu Jin Qingmin |
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| Abstract: | Cenozoic volcanic rocks in Fildes Peninsula can be divided into four lithological members, i.e., Jasper Hill Member (Eb), Agate Beach Member (Em), Fossil Hill Member (Eh) and Block Hill Member (Ey). They include mainly high-alumina basalt, basaltic andesite, a few of andesite and dacite as well, belonging to calc alkaline series but somewhat tholeiitic series in the early stage. High alumina basalt has a two-stage genetic model, i.e., during the first stage the upper mantle wedge underwent partial melting and produced primary olivine tholeiitic magma, and then during the second stage the primary magma evolved high-alumina basaltic magma after extensive crystallization of olivine and clinopyroxene. |
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| Keywords: | volcanic rocks two-stage genetic model magmatic difFerentiation Antarctica |
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