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大兴安岭北部地区位于中亚造山带的东段,是研究造山带构造演化的重要地区。东北地区大地构造单元的划分集中反映了区域构造演化研究程度和对基底性质的认识。有关大兴安岭北部地区基底属性和形成时代的认识大致经历了两个研究阶段:在槽台理论时期,黄汲清等(1977)将大兴安岭地区划分为额尔古纳兴凯(震旦纪—早寒武世)褶皱系和兴安华力西(晚古生代)褶皱系;随着板块构造理论的引入,人们普遍将东北地区划
The northern part of the Greater Hinggan Mountains is located in the eastern part of the Central Asian orogenic belt and is an important area for studying the tectonic evolution of the orogenic belt. The division of tectonic units in the northeastern region reflects the degree of research on regional tectonic evolution and the understanding of the nature of the basement. The understanding of the basement properties and the age of formation in the northern part of the Greater Xing’an Mountains has generally gone through two research stages: During the period of slot platform theory, Huang et al. (1977) classified the Greater Hinggan Mountains into Ergun Xingkai (Sinian- Wulian) fold system and the Hing’an Variscan (late Paleozoic) fold system. With the introduction of plate tectonics, it is generally accepted that the northeastern region