摘要
赣西北地区在二叠纪末—三叠纪初，曾经历过地壳上升、海平面快速下降、沉积环境变迁、生物灭绝等灾变性地质事件。作者以典型剖面为依据，分析了Ｐ—Ｔ界线的层序地层特征、岩石微量元素含量、沉积环境、古生物化石，认为本区发现的界线粘土岩属火山成因，该粘土岩层正好是Ｐ—Ｔ的界线层。
The Northwest Jiangxi region underwent the catastrophic geological e-yents, such as the crust uprift,rapid settlement of sealevel, deformationof sedimentary environment and organism extinction,etc. during the perio- ds of the late Permian and early Triassic.In the light of the typicalprofile,the authors analyze the stratigraphical features of measures,content oflithological rare earth, sedimentary enviornment and the Paleontologic fos-sil of P-T boundary,Therefore,the authors hold that boundary clayrockdiscovered in this area is of the volcanic genesis,and the clayrock bedis just the boundary strata of P-T.
出处
《江西地质》
1994年第2期122-129,共8页
Jiangxi Geology
