东南极古陆核的研究现状、问题与设想  

Ancient cratonic nuclei in East Antarctica:Research status,problems and prospects

作　　者：刘晓春[1,2,3] 赵越 王伟[1,2,3] 陈龙耀 郑光高[1,2,3] 刘健[1,2,3] 王亚飞 任留东[4] LIU Xiaochun;ZHAO Yue;WANG Wei;CHEN Longyao;ZHENG Guanggao;LIU Jian;WANG Yafei;REN Liudong(Institute of Geomechanics,Chinese Academy of Geological Sciences,Beijing 100081,China;Research Center for Polar Geosciences,China Geological Survey,Beijing 100081,China;Key Laboratory of Paleomagnetism and Tectonic Reconstruction of Ministry of Natural Rescources,Beijing 100081,China;Institute of Geology,Chinese Academy of Geological Sciences,Beijing 100037,China)

机构地区：[1]中国地质科学院地质力学研究所,北京100081 [2]中国地质调查局极地地学研究中心,北京100081 [3]自然资源部古地磁与古构造重建重点实验室,北京100081 [4]中国地质科学院地质研究所,北京100037

出　　处：《地质力学学报》2021年第5期691-704,共14页Journal of Geomechanics

基　　金：国家自然科学基金项目(41941004)。

摘　　要：东南极地盾(克拉通)中的太古宙陆核主要分布在面向印度洋扇区的内皮尔山、南查尔斯王子山、赖于尔群岛和西福尔丘陵,在面向澳大利亚、非洲和太平洋扇区只零星出露。这些古陆核被早元古代—早古生代(泛非期)造山带所分割,它们具有不同的早期演化历史和后期改造过程,并且产于不同扇区的陆核与相邻冈瓦纳陆块具有密切的亲缘关系。对东南极古陆核开展系统的冰上和冰下地质调查以及岩石地球化学综合研究,查明太古宙岩石(物质)的时空分布、岩石成因、源区性质、构造属性及其变质改造历史,进而构建东南极古大陆从初始成核到最终聚陆的历史框架,这将弥补地球早期演化研究领域的南极短板,同时也必将促进地球早期演化研究领域的发展。The Archean cratonic nuclei in the East Antarctic Shield(Craton)occur mainly in the Napier Mountains,southern Prince Charles Mountains,Rauer Group and Vestfold Hills in the Indian Ocean sector,and are sporadically exposed in the Australian,African and Pacific sectors.These ancient nuclei with diverse earlier crustal histories and later reworking processes are separated by the Paleoproterozoic-Early Paleozoic(Pan-African-aged)orogens.The nuclei in different sectors have a close affinity with the adjacent Gondwana continental blocks.Integrated bedrock and subglacial geological investigations and petrological and chemical studies will ascertain the temporal and spatial distributions,petrogenesis,source regions,tectonic affinities and multiple metamorphic records of the Archean rocks(materials)in East Antarctica.This can help to reveal the major history from nucleation to assembly of the East Antarctica continent,and thus to contribute to a better understanding of the early history of the Earth from an Antarctic perspective.

关 键 词：太古宙陆核 多样性 亲缘性 东南极 冈瓦纳 

分 类 号：P728.2[天文地球—海洋科学] P313.2