Volcanic Eruption Cycles of the Cretaceous Yingcheng Formation in the Songliao Basin
详细信息
- 责任者：Yang Di (Daqing Oilfield Exploration and Development Institute ; Daqing 163712 ; China) ; Wang Pujun
- 刊名：Journal of Stratigraphy
- 出版年：2011
- 卷期：35(2)
- 关键词：营城组 ; Yingcheng Formation ; 火山岩 ; volcanic rocks ; 松辽平原 ; Songliao Plain
- 页码：p.122-128
- 图表：2 illus., 3 tables, 39 refs.
- 分类号：0801
- 出版序号：824
- issnNo：ISSN0253-4959
- isbnNo：CN32-1187/P
摘要
Volcanic activities recorded in the Cretaceous Yingcheng Formation in the Songliao Basin are characterized by multiple eruption centers, multiple eruption cycles, and complex and variable volcanic lithologies. On the basis of volcanic sequence and assemblage, volcanic eruption cycles in the Yingcheng Formation in the Songliao Basin are inferred to represent variations in the intensity of volcanic activity (e.g., from quiet to intense and then to quiet). An eruption cycle consists of one or several eruption stages. Analysis of drill cores and field sections shows that the Member 1 (K1y1) and Member 3 (K1y3) of Yingcheng Formation each consist of three volcanic eruption cycles.