【摘要】 根据吉林省延边地区汪清县大兴沟镇和盛村附近含早二叠世华夏植物群陆相地层的发育特征,结合前人对延边地区石炭纪—二叠纪地层研究成果,提出一个新的岩石地层单位——和盛组,用来代表延边地区晚石炭世—早二叠世山秀岭组海相碳酸盐岩沉积和早—中二叠世大蒜沟组海相碳酸盐岩及碎屑岩沉积之间的一套陆相碎屑岩沉积,其时限为早二叠世晚期(亚丁斯克—空谷早期)。和盛组层型剖面为吉林省延边地区汪清县大兴沟镇和盛村剖面,厚230m,主要由灰色、灰黑色砾岩、含砾砂岩、粉砂岩及粉砂质泥岩为主的陆相沉积组成,与下伏地层山秀岭组假整合接触,与上覆大蒜沟组整合接触。和盛组与上覆大蒜沟组构成华北板块北缘早—中二叠世一个海进地层序列。和盛组的建立为探讨华北板块与佳蒙地块的分界、研究西拉木伦河—延吉缝合带在延边地区的东延提供了重要的地层证据。更多还原

【Abstract】 A new lithostratigraphic unit,the Hesheng Formation,is erected to represent Cisuralian(Lower Permian) terrestrial strata characterized by the Cathaysia flora in the Yanbian area,Jilin Province.The type section of the formation is the Heshengcun section in the vicinity of Hesheng Village of Daxinggou Town,Wangqing County.This formation consists of about 230 m of grey and dark grey conglomerate,coarse-grained sandstone,siltstone and mudstone.It is underlyain by the Upper Carboniferous-Cisuralian marine carbonate of the Shanxiuling Formation with an unconformable contact,and overlain by conformably the Cisuralian-Guadalupian marine carbonate of the Dasuangou Formation.The Hesheng and Dasuangou formations constitute a Cisuralian-Guadalupian transgressive sequence on the northern margin of the North China Plate.Biostratigraphic evidence suggests that the Hesheng Formation is of Late Cisuralian(Artinskian-Early Kungurian) in age.The Hesheng Formation in the Yanbian area provides stratigraphic evidence to better understand the tectonic history of the North China Plate,the boundary between the North China Plate and the Jiamusi-Mongolia Block,and the eastward extension of the Xar Moron River-Yanji suture zone.更多还原