大兴安岭及邻区石炭—二叠纪地层和生物古地理

摘要

With study on the Carboniferous-Permian strata in Daxinganling and its adjacent areas, this paper introduces their distribution, rock association, fossil assemblage etc., especially the Early-Middle Permian mixed fauna of cool and warm sea water fossil types in some places. Based on the Paleozoic plate tectonic movement of this region, the author gives a biological paleogeographical division, i.e. the northern part of the region belongs to the Xingan sub-province, Junggar-Xingan province of Boreal Realm, to be characteristic of the fauna of cool water type; while the southern part is assigned to the northern marginal sub-province, North China province of Tethyan Realm, characterized by the fauna of warm water type. The mixed fauna of cool and warm water fossil types are distributed in some places between the Siberian plate and the North China plate during Early-Middle Permian.%研究分析了大兴安岭及其邻区石炭—二叠纪地层,着重介绍各地层单元的分布范围、岩性组合、生物化石特征,特别总结了早、中二叠世冷水型和暖水型生物组合在本区局部出现的混生现象.根据本区板块构造发育,结合生物组合特征,进行了生物古地理分区的划分.本区北部属于北方大区,准噶尔-兴安区,兴安亚区；南部属于特提斯大区,华北区,华北北缘亚区.