俯冲板块板内岩浆作用和动力学  

Geodynamics of intraplate magmatism in subducting plate

作　　者：但卫[1,2] 王强 马林[1,2] 唐功建[2] 张修政 DAN Wei;WANG Qiang;MA Lin;TANG Gong-jian;ZHANG Xiu-zheng(State Key Laboratory of Isotope Geochemistry,Guangzhou Institute of Geochemistry,Chinese Academy of Sciences,Guangzhou 510640,China;CAS Center for Excellence in Deep Earth Science,Chinese Academy of Sciences,Guangzhou 510640,China;College of Earth and Planetary Sciences,University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院广州地球化学研究所,同位素地球化学国家重点实验室,广州510640 [2]中国科学院深地科学卓越创新中心,广州510640 [3]中国科学院大学地球与行星科学学院,北京100049

出　　处：《矿物岩石地球化学通报》2023年第5期976-987,I0003,共13页Bulletin of Mineralogy, Petrology and Geochemistry

基　　金：国家自然科学基金资助项目(42021002);第二次青藏高原科学考察项目(2019QZKK0702)。

摘　　要：地球上的岩浆活动主要发生于大洋中脊、俯冲带,而板内岩浆通常是由地幔柱或热点作用产生的。最近一二十年,在俯冲板块内部发现了一些岩浆活动,它们通常不能用传统的动力学机制来解释。本文综述了位于不同构造背景的俯冲板块内部的岩浆活动,包括大洋板块俯冲背景下俯冲的大洋和大陆板块部分,以及陆陆碰撞背景下俯冲的大陆板块。在此基础上,讨论了板片拉力在俯冲板块岩浆作用中的地位和效应,认为俯冲下盘微陆块的裂解通常需要多种因素的综合,并且需要多学科综合研究来鉴别地史上的俯冲板块以及相应的板内岩浆作用。俯冲板块中的板内岩浆的识别和研究将是板块构造理论框架下解释板内岩浆作用的重要补充。Magmatism mainly occurred in the mid-ocean ridges and subduction zones of the Earth,while intraplate magmas are usually generated by mantle plumes or hotspots.In the last one or two decades,some magmatisms which were found in the interior of subducting plates,usually cannot be explained by using the conventional geodynamic mechanisms.In this paper,we have reviewed researches on magmatism in subducting plates located in different tectonic setings including parts of subducting oceanic and continental plates in the oceanic plate subduction setting and the subducting continental plate in the continental-continental collision setting.Based on the above review,we have discussed roles and effects of the slab pull in the generation of magmatism within subducting plates,believed that the breakup of microcontinental blocks under the subducting plate usually requires a combination of several factors,and pointed out that integrated multidisciplinary studies are needed to identify subducting plates and relevant intraplate magmatisms in geological history.The identification and study of intraplate magmatisms within subducting plates will be an important complement to the interpretation of intraplate magmatism in the framework of plate tectonic theory.

关 键 词：俯冲板块 板内岩浆 板片拉力 地幔柱 大陆裂解 

分 类 号：P588.11[天文地球—岩石学]