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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.
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(in Chinese with English abstract).
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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
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11,2
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
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。
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
DOI:
分类号:
基金项目:中国地质大学(北京)开放实验室项目(GPMR0735),国家自然科学基金项目(NSFC40802020)及中国地质调查局地质大调查项目(1212010633902,1212010633903,1212010911028,1212010711814)资助。
High magnesian andesitic/dioritic rocks (HMA) and magnesian andesitic/dioritic rocks (MA): two igneous rock types related to oceanic subduction
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-yan11,2
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
Abstract:
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.
Key words:  high-Mg andesitic rocks (HMA)  Mg andesitic rocks (MA)  igneous rocks related to oceanic subduction