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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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邓晋福1,2刘翠1冯艳芳1,2肖庆辉1,2苏尚国1赵国春1孔维琼1曹文燕1. 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.
引用本文: 邓晋福1,2刘翠1冯艳芳1,2肖庆辉1,2苏尚国1赵国春1孔维琼1曹文燕1. 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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DENG Jin-fu1,2, LIU Cui1, FENG Yan-fang1,2, XIAO Qing-hui1,2, SU Shang-guo1, ZHAO Guo-chun1, KONG Wei-qiong1, CAO Wen-yan1. High magnesian andesitic/dioritic rocks (HMA) and magnesian andesitic/dioritic rocks (MA)： two igneous rock types related to oceanic subduction[J]. Geology in China, 2010, 37(4): 1112-1118.
Citation: DENG Jin-fu1,2, LIU Cui1, FENG Yan-fang1,2, XIAO Qing-hui1,2, SU Shang-guo1, ZHAO Guo-chun1, KONG Wei-qiong1, CAO Wen-yan1. High magnesian andesitic/dioritic rocks (HMA) and magnesian andesitic/dioritic rocks (MA)： two igneous rock types related to oceanic subduction[J]. Geology in China, 2010, 37(4): 1112-1118.
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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

  • 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;2.中国地质调查局发展研究中心,北京100037

High magnesian andesitic/dioritic rocks (HMA) and magnesian andesitic/dioritic rocks (MA)： two igneous rock types related to oceanic subduction

  • 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

    摘要
  • 提要：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。
    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. (3) Either of the two methods, i.e., the diagram approach (Fig.2&3) or the numeric approach (Table 1,2&3), may be used for the nomenclature of HMA and MA.
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刊出日期:  2010-08-24

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