| 高镁安山岩/闪长岩类(HMA)和镁安山岩/闪长岩类(MA):与洋俯冲作用相关的两类典型的火成岩类 |
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| 引用本文： | 邓晋福,刘 翠 冯艳芳,肖庆辉,苏尚国 赵国春 孔维琼 曹文燕.高镁安山岩/闪长岩类(HMA)和镁安山岩/闪长岩类(MA):与洋俯冲作用相关的两类典型的火成岩类[J].中国地质,2010,37(4):1112-1118. |
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| 作者姓名： | 邓晋福 刘 翠 冯艳芳 肖庆辉 苏尚国 赵国春 孔维琼 曹文燕 |
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| 作者单位： | 1. 中国地质大学地质过程与矿产资源国家重点实验室,北京,100083;中国地质调查局发展研究中心,北京,100037
2. 中国地质大学地质过程与矿产资源国家重点实验室,北京,100083 |
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| 基金项目： | 中国地质大学(北京)开放实验室项目，国家自然科学基金项目，中国地质调查局地质大调查项目 |
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| 摘 要： | 本文主要基于对实验岩石学成果的简要评述,讨论与洋俯冲作用有关的两类典型的火成岩类:楔形地幔在含水条件下橄榄岩局部熔融产生的高镁安山岩/闪长岩类(HMA)和俯冲洋壳局部熔融岩浆与地幔楔相互作用产生的镁安山岩/闪长岩类(MA)。提出:(1)识别HMA和MA必须同时运用两套参数系统:SiO2-MgO系统和SiO2-FeO/MgO系统;(2)区别HMA和MA是在它们均符合LF-CA(低Fe钙碱趋势)特征条件下,再用SiO2-MgO系统进一步加以鉴别;(3)识别HMA和MA的方法,或用在给定SiO2时,MgO和FeO/MgO的具体数值,或用图解法。
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| 关 键 词： | 高镁安山岩/闪长岩类 镁安山岩/闪长岩类 与洋俯冲有关的火成岩类 |
High magnesian andesitic/dioritic rocks(HMA)and magnesian andesitic/dioritic rocks(MA): two igneous rock types related to oceanic subduction |
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| DENG Jin-fu,LIU Cui,FENG Yan-fang,XIAO Qing-hui,SU Shang-guo,ZHAO Guo-chun,KONG Wei-qiong,CAO Wen-yan.High magnesian andesitic/dioritic rocks(HMA)and magnesian andesitic/dioritic rocks(MA): two igneous rock types related to oceanic subduction[J].Chinese Geology,2010,37(4):1112-1118. |
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| Authors: | DENG Jin-fu LIU Cui FENG Yan-fang XIAO Qing-hui SU Shang-guo ZHAO Guo-chun KONG Wei-qiong CAO Wen-yan |
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| Institution: | DENG Jin-fu1,2,LIU Cui1,FENG Yan-fang1,XIAO Qing-hui1,SU Shang-guo1,ZHAO Guo-chun1,KONG Wei-qiong1,CAO Wen-yan1(1.State Key Laboratory of Geological Processes and Mineral Resources,Key Laboratory of Lithospheric Tectonics and Lithoprobe Technology of Ministry of Education,China University of Geosciences,Beijing 100083,China,2.China Geological Survey,Beijing 100037,China) |
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| Abstract: | This paper discusses two igneous rock types(HMA and MA) related to oceanic subduction based on a brief review of the experimental petrological data.On such a basis,some suggestions are put forward as follows:(1) The utilization of both the MgO % and FeO/MgO(% ratio) at given SiO2 as the diagnostic parameters is emphasized in recognition of HMA and MAl.(2) On the basis of the LF-CA(Low-Fe calc-alkaline) characteristics,HMA and MA may be distinguished from each other by using the SiO2%-MgO % parameter system.... |
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| Keywords: | high-Mg andesitic rocks(HMA) Mg andesitic rocks(MA) igneous rocks related to oceanic subduction |
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