| 识别洋陆转换的岩石学思路——洋内弧与初始俯冲的识别 |
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| 引用本文： | 肖庆辉,李廷栋,潘桂棠,陆松年,丁孝忠,邓晋福,冯益民,刘勇,寇彩化,杨琳琳.识别洋陆转换的岩石学思路——洋内弧与初始俯冲的识别[J].中国地质,2016(3):721-737. |
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| 作者姓名： | 肖庆辉 李廷栋 潘桂棠 陆松年 丁孝忠 邓晋福 冯益民 刘勇 寇彩化 杨琳琳 |
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| 作者单位： | 中国地质科学院地质研究所, 北京 100037;中国地质调查局发展研究中心, 北京 100037,中国地质科学院地质研究所, 北京 100037;国土资源部咨询研究中心, 北京 100035,成都地质矿产研究所, 四川 成都 610082,国土资源部咨询研究中心, 北京 100035;天津 地质矿产研究所, 天津 300170,中国地质科学院地质研究所, 北京 100037,国土资源部咨询研究中心, 北京 100035;中国地质大学地球科学与资源学院, 北京 100083,西安地质矿产研究所, 陕西 西安 710054,中国地质科学院地质研究所, 北京 100037,中国地质科学院地质研究所, 北京 100037,中国地质大学地球科学与资源学院, 北京 100083 |
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| 基金项目： | 中国地质调查局"中国地质志、图及欧亚大陆大地构造图编制"(2011FY120100)、"主要地质单元区域地质调查与片区总结"(1212011120115)、"江南造山带区域地质调查与片区总结"(121201111120117)联合资助。 |
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| 摘 要： | 阐述了洋陆转化形成的洋内弧与初始弧的岩石组合序列及其地球化学特征,提出岩浆弧是由洋陆转化以及底侵的壳幔转化共同作用形成的认识,前弧环境是洋陆转化形成初生大陆的场所,由特征的类似洋中脊的洋内弧前弧玄武岩类构成。大陆的形成过程如下:从地幔中生长出洋壳,从洋壳中的洋陆转化生长出不成熟的弧陆壳,最后从弧陆壳底侵的壳幔转化中长出成熟的陆壳。这样,地壳的生长和形成主要通过岩浆增生作用来实现。
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| 关 键 词： | 洋内弧 初始俯冲 大陆生长 洋陆转换 前弧 壳幔转化 |
| 收稿时间： | 2015/10/12 0:00:00 |
| 修稿时间： | 2015/12/1 0:00:00 |
Petrologic ideas for identification of ocean-continent transition: Recognition of intra-oceanic arc and initial subduction |
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| XIAO Qing-hui,LI Ting-dong,PAN Gui-tang,LU Song-nian,DING Xiao-zhong,DENG Jin-fu,FENG Yi-min,LIU Yong,KOU Cai-hua and YANG Lin-lin.Petrologic ideas for identification of ocean-continent transition: Recognition of intra-oceanic arc and initial subduction[J].Chinese Geology,2016(3):721-737. |
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| Authors: | XIAO Qing-hui LI Ting-dong PAN Gui-tang LU Song-nian DING Xiao-zhong DENG Jin-fu FENG Yi-min LIU Yong KOU Cai-hua and YANG Lin-lin |
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| Institution: | Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037, China;Development Research Center, China Geological Survey, Beijing 100037, China,Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037, China;Consulting Research Center, MLR, Beijing 100035, China,Chengdu Institute of Geology and Mineral Resources, Chengdu 610082, Sichuan, China,Consulting Research Center, MLR, Beijing 100035, China;Tianjin Institute of Geology and Mineral Resources, Tianjin 300170, China,Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037, China,Consulting Research Center, MLR, Beijing 100035, China;School of Earth Science and Resources, China University of Geosciences, Beijing 100083, China,Xi''an Institute of Geology and Mineral Resources, Xi''an 710054, Shaanxi, China,Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037, China,Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037, China and School of Earth Science and Resources, China University of Geosciences, Beijing 100083, China |
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| Abstract: | In this paper, the authors describe the rock assemblage series and geochemical characteristics of the intra-oceanic arc and initial arc during the ocean-continent transition, and propose that the magmatic arc was formed together with the ocean-continent transition and the underplating crust-mantle transition. The former arc environment was the place where the primary continent was formed by the ocean-continent transition, which constituted diagnostic basalts of former arc of intra-oceanic arc similar to the midoceanic ridge. The formation process of the continent is as follows: the oceanic crust grew from the mantle, and the immature arccontinent crust grew from the ocean-continent transition in the oceanic crust: at last, the mature continent crust grew from the curstmantle transition of underplating arc-continent crust. Therefore, the growth and formation of the earth''s crust was mainly realized by the accretion of magma. |
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| Keywords: | intra-oceanic arc initial subduction continent growth ocean-continent transition former arc crust-mantle transition |
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