摘要
拉斯曼丘陵位于东南极伊丽莎白公主地英格里德·克里斯滕森海岸,地势呈南高北低特征,受地质构造、冰川、温度、极风等多种内外地质营力多重影响,其发育多种地貌类型.拉斯曼丘陵主体由变质程度达角闪岩相-麻粒岩相且发生复杂变形的变质岩组成.1989 年,中国在拉斯曼丘陵的米洛半岛上建立了东南极常年科学考察站——中山站,为我国科学家开展东南极地球科学研究提供了重要基地.本文基于 35 年来我国科学家在该区的调查研究和成果,总结了东南极拉斯曼丘陵的变质层序、变质年龄、原岩建造、变质条件和构造环境等方面的研究进展.表明我国科学家取得的部分科研成果引领并提升了对泛非造山带演化的认知水平.未来应重视的重点研究领域包括区域多期变质事件的性质、镁铁质-超镁铁质麻粒岩性质和造山带属性等科学问题.
Abstract
The Larsemann Hills are located on the Ingrid Christensen Coast of Princess Elizabeth Land,East Ant-arctica,have the topographer with the high in the south and low in the north.Influenced by various internal and external geological forces,including geological structure,glaciers,temperature,and polar winds,the region shows a diverse array of landforms.The predominant rock type is metamorphic rocks that have ex-perienced the complex deformation and metamorphism from the amphibolite to granulite facies.In 1989,China constructed the year-round Antarctic research station,the Zhongshan Station,on the Mirror Peninsula,Larsemann Hills.The station then became the home for Chinese scientists undertaking earth science research in East Antarctica.The research of Chinese scientists on the metamorphic sequence,metamorphic age,pro-tolith composition,metamorphic conditions and tectonic environment in this region over the past 35 years is summarized.The findings of Chinese scientists have greatly promoted the cognition of the evolution of the Pan-African orogenic belt.In the future,the priority should be paid more attention on the nature of regional multi-stage metamorphic events,the characteristics of mafic-ultramafic granulites,and the attributes of oro-genic belts.
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