| 异剥钙榴岩及其岩石成因意义 |
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| 引用本文： | 倪志耀,翟明国,赵太平,周磊.异剥钙榴岩及其岩石成因意义[J].地球科学进展,2005,20(4):407-413. |
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| 作者姓名： | 倪志耀 翟明国 赵太平 周磊 |
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| 作者单位： | 成都理工大学,四川,成都,610059;中国科学院地质与地球物理研究所,北京,100029;中国科学院地质与地球物理研究所,北京,100029;中国科学院广州地球化学研究所,广东,广州,510640;成都理工大学,四川,成都,610059 |
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| 基金项目： | 国家自然科学基金;中国科学院知识创新工程项目 |
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| 摘 要： | 异剥钙榴岩作为一种特殊的交代变质岩，绝大多数与超镁铁岩的蛇纹石化有关，是超镁铁岩蛇纹石化过程中所产生的富钙流体对与其伴生的相关岩石进行钙交代的结果。蛇纹石化的超镁铁岩或为蛇绿岩的端员组分，或为太古代绿岩带、阿拉斯加型和阿尔卑斯型等其它成因类型的超镁铁岩。它们多为纯橄榄岩、方辉橄榄岩和辉石岩等。异剥钙榴岩的形成主要取决于超镁铁岩的蛇纹石化作用和钙交代程度，而与超镁铁岩的成因类型、构造属性和时代归属没有多大的关系。那种将异剥钙榴岩片面地看成蛇绿岩的组成部分或者作为鉴别蛇绿岩辅助标志的观点需要改正。
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| 关 键 词： | 异剥钙榴岩 超镁铁岩 蛇纹岩化 钙交代作用 |
| 文章编号： | 1001-8166(2005)04-0407-07 |
| 收稿时间： | 2003-09-30 |
| 修稿时间： | 2003年9月30日 |
PETROLOGY OF RODINGITES AND THEIR PETROGENETICAL SIGNIFICANCE |
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| NI Zhi-yao,ZHAI Ming-guo,ZHAO Tai-ping,ZHOU Lei.PETROLOGY OF RODINGITES AND THEIR PETROGENETICAL SIGNIFICANCE[J].Advance in Earth Sciences,2005,20(4):407-413. |
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| Authors: | NI Zhi-yao ZHAI Ming-guo ZHAO Tai-ping ZHOU Lei |
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| Institution: | 1.Chengdu University of Technology,Chengdu 610059,China;2.Institute of Geology and Geophysics,Chinese Academy of Sciences,Beijing 100029,China;3.Institute of Guangzhou Geochemistry,Chinese Academy of Sciences,Guangzhou 510640,China |
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| Abstract: | The rodingites are a kind of special metasomatite ,and mostly related to serpentinised ultramafic rocks. They are the result of calcic metasomatism between calcium-rich fluid and related rocks during serpentinization. The serpentinised ultramafic rocks are either end-members of ophiolite or other genetical ultramafic rocks such as Archaean greenstone, Alaskan- or Alpine-type rocks, and the rock type may be the dunite,harzburgite and pyroxenite. The formation of rodingites depends on the serpentinization and degree of calcic metasomatism,and has no relationship for genetical types,tectonic setting and age of ultramafic rocks.The viewpoint that rodingites are the end-member of ophiolite or the auxiliary sign for ophiolite discrimination needs to be corrected. |
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| Keywords: | Rodingites Ultramafic rock Serpentinization Calcic metasomatism |
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