| 洋岛-海山研究进展及其对于重建洋板块的意义 |
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| 引用本文： | 袁四化,潘桂棠,任飞.洋岛-海山研究进展及其对于重建洋板块的意义[J].地球科学,2020,45(8):2826-2845. |
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| 作者姓名： | 袁四化 潘桂棠 任飞 |
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| 作者单位： | 1.防灾科技学院, 河北三河 065201 |
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| 基金项目： | 中央高校基本科研业务费ZY20110202国家自然科学基金项目41772200国家自然科学基金项目91755212防灾科技学院精品课程建设项目JPJS2018001防灾科技学院精品课程建设项目JPJS2018005中国地质调查局项目DD20190375中国地质调查局项目DD20190053中国地质调查局项目DD20179386中国地质调查局项目DD2016G0345 |
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| 摘 要： | 在中国区域大地构造研究中，对洋岛-海山/洋底高原的识别尚未引起足够重视.为深入研究中国大陆洋板块构造，系统回顾了洋岛-海山/洋底高原的基本概念、基本特征和增生造山过程.洋岛-海山/洋底高原是在海底扩张、大洋壳演化过程中由于地幔热点/柱作用形成的有异常厚度洋壳的区域，是大洋岩石圈的重要组成部分.洋岛-海山/洋底高原在垂向上具有典型的二元结构，下部以镁铁质、超镁铁质岩石为主，上部以碳酸盐岩建造为主.现今大洋盆地中大面积分布着正在演化中和正在俯冲的洋岛-海山，根据比较大地构造学原理，古洋岛-海山的存在指示古大洋盆地的存在，是研究造山带的重要载体.认为地史时期大洋盆地中有相当数量的洋岛、海山，在俯冲增生碰撞造山过程中保留下来的古洋岛-海山残块以构造岩片（块）形式夹持在俯冲增生杂岩中，随大洋盆地关闭；其作为缝合带的重要组成部分，是识别对接带的重要判别依据之一.
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| 关 键 词： | 洋岛-海山 洋底高原 增生造山作用 俯冲增生杂岩 洋板块地质学 |
| 收稿时间： | 2020-03-26 |
Review on Geological Research of Oceanic Island-Seamount and Its Significance for Reconstruction of Ocean Plate |
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| Abstract: | The identification of oceanic island-seamount/oceanic plateau has not been attended sufficiently in the regional tectonic analysis of China. In order to study the ocean plate geology of China in depth, the basic concepts, characteristics and accretionary procession of the oceanic island-seamount and ocean floor plateau are reviewed systematically in this paper. Ocean island-seamount/oceanic plateau is an area with abnormal thickness ocean crust formed by hot spot/mantle plume in the process of ocean floor spreading and ocean crust evolution. It is an important part of the oceanic lithosphere. The ocean island-seamount/oceanic plateau has a typical binary structure, with the lower part dominated by mafic and ultramafic rocks, and the upper part composed of carbonate rock formation. According to the principles of comparative tectonics, the existence of the ancient ocean island-seamount indicates the relics of the fossil ocean basin. It is an important carrier to study the orogenic belt. It is considered that there are quite a number of oceanic island-seamounts in the oceanic basin during the geological history. During the subduction-accretion to collision orogeny, the remaining fossil oceanic island-seamounts are sandwiched in the subduction-accretion complex in the form of tectonic slices (blocks), which is one of the important criteria to identify the suture zone, when the ocean closed. |
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