The Mesozoic Strata and the Jurassic-Cretaceous Boundary in the Daxinganling Region
详细信息
- 责任者：Shao Jidong (Inner Mongolia Institute of Geological Survey ; Hohhot 010020 ; China) ; Tan Qiang
- 刊名：Geology and Resources
- 出版年：2011
- 卷期：20(1)
- 关键词：侏罗纪 ; Jurassic ; 白垩纪 ; Cretaceous ; 地层界线 ; stratigraphic boundary ; 大兴安岭 ; Greater Hinggan Mountains
- 页码：p.4-11
- 图表：2 tables, 15 refs.
- 分类号：1200
- issnNo：ISSN1671-1947
- isbnNo：CN21-1458/P
摘要
The Jurassic-Cretaceous strata in Daxinganling region are studied regarding the lithostratigraphic units, contact relation, distribution, paleontology and isotopic chronology. The J-K boundary is discussed on the basis of such study. The U-Pb isotopic ages of zircon by SHRIMP are greater than 145 Ma. With the support of fossil assemblages of Peipiaosteus, Nestoria-Keratestheria and Ferganoconcha, the J-K boundary is set between Baiyingaolao formation and Meiletu and Yixian formations.