Chronostratigraphy of the Yingcheng Formation in the Songliao Basin, Cretaceous, NE China

详细信息   

• 责任者：Jia Juntao (College of Earth Sciences ; Jilin University ; Changchun 130061 ; China) ; Wang Pujun
• 刊名：Geological Review
• 出版年：2008
• 卷期：54(4)
• 关键词：早白垩世 ; Lower Cretaceous ; 松辽平原 ; Songliao Plain
• 页码：p.439-448
• 图表：4 illus., 2 tables, 37 refs.
• 分类号：1200
• issnNo：ISSN0371-5736
• isbnNo：CN11-1952/P

摘要

The chronostratigraphy of the Lower Cretaceous Yingcheng Formation (K₁y) of the Songliao Basin was disscussed and summarized on the basis of biostratigraphy, isotopic dating, lithostratigraphy as well as magnetostratigraphy. The sporo-pollen assemblages of the K₁y showed a blooming age from Hauterivian to Albian of Early Cretaceous. The isotopic ages dated on the volcanic rocks/tuffs of the K₁y showed two peaks in the histogram ranging from 135 Ma to 120 Ma and from 115 Ma to 110 Ma, respectively. All these evidences suggest that the age of the Yingcheng Formation can be well constrained from Hauterivian to early Albian with a chronology age ranging from 135 Ma to 110 Ma.