【摘要】 黑龙江省西北部地区为森林沼泽浅覆盖区,中生代填图单位的划分、对比及形成时代一直是该地区的重点研究问题,也是地层划分对比争论的焦点之一。本文结合近年本地区开展的1/20万、1/25万、1/5万区域地质调查项目和相关的科研论文成果等实际资料,并结合邻区资料和最新的同位素年龄成果,提出了新的划分对比意见,将本区侏罗纪—早白垩世地层划分对比为漠河、塔河、兴隆—呼玛3个地层小区和17个组级地层单位。更多还原

【Abstract】 The stratigraphic age, subdivision, and correlation of Jurassic and Early Cretaceous strata in northwestern Heilongjiang Province has been a significant challenge because of dense forestation and poor exposures. This paper proposes a new subdivision and correlation scheme based on 1/200000, 1/250000, and1/50000 regional geological survey data, stratigraphic data from adjacent regions, and latest isotopic ages.Jurassic and Early Cretaceous strata in northwestern Heilongjiang Province can be divided into 17 stratigraphic units that are distributed in 3 stratigraphic regions(i.e., Mohe, Tahe and Xinglonghuma regions).更多还原