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| 如何判定俯冲增生杂岩中的高度肢解的洋底高原-海山系统 |
| 肖庆辉,刘勇,程杨,邱瑞照,范玉须,裴斐,杨斌 |
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(1. 中国地质科学院地质研究所, 北京 100037;
2. 中国冶金地质总局矿产资源研究院, 北京 101300;
3. 中国地质调查局发展研究中心, 北京 100037;
4. 中国煤炭地质总局勘查研究总院, 北京 100039;
5. 中国地质大学地球科学与资源学院, 北京 100083) |
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| 摘要: |
| 巨型洋底高原或海山系统到达俯冲带发生俯冲以后会在俯冲过程中发生肢解，在增生杂岩带中形成面目全非的小型洋底高原-海山系统的断块或碎片，使得在增生杂岩带中识别古老洋底高原-海山系统变得十分困难。为此，本文提出了基于洋板块地层、岩石学和地球化学联合研究的新方法及其识别标志，重新审定增生杂岩中洋底高原或海山的成因。 |
| 关键词: 洋板块地质 俯冲增生杂岩带 洋底高原 海山 |
| DOI：10.19826/j.cnki.1009-3850.2021.02006 |
| 附件 |
| 投稿时间：2020-11-03修订日期：2021-02-20 |
| 基金项目:地调“全国陆域及海区地质图件更新与共享”项目（No.DD20190370） |
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| How to recognize the highly dismembered ocean floor plateau-seamount system in accretionary complexes? |
| XIAO Qinghui, LIU Yong, CHENG yang, QIU Ruizhao, FAN Yuxu, PEI Fei, YANG Bin |
(1. Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037, China;
2. Institute of Mineral Resources Research, China Metallurgical Geology Bureau, Beijing 101300, China;
3. Development and Research Center of China Geological Survey, Beijing 100037, China;
4. General Prospecting Institute, China National Administration of Goal Geology, Beijing 100039, China;
5. School of Earth Science and Resource, China University of Geoscience, Beijing 100083, China) |
| Abstract: |
| When a giant ocean floor plateau-seamount system reaches the subduction zone, it will be dismembered into small blocks in the subduction process. It is difficult to identify the ancient ocean floor plateau-sea mountain system in the accretionary complex zone. In this light of the integration of oceanic plate strata, lithology and geochemistry, a new model is suggested in this paper to recognize ancient ocean floor plateau-seamount system in accretionary complex zones. |
| Key words: oceanic plate geology subduction accretionary zone ocean floor plateau seamount |