Identification of Uncomformity Plane at the Bottom (K2qn3) of Qingsan Member in the Songliao Basin
详细信息
- 责任者：Wang Jiangong (Lanzhou Geoscience Institute ; Chinese Academy of Sciences ; Lanzhou 730000 ; China) ; Wang Tianqi
- 刊名：Acta Geologica Sinica
- 出版年：2009
- 卷期：83（1）
- 关键词：不整合 ; unconformities ; 油气勘探 ; petroleum exploration ; 层序地层学 ; sequence stratigraphy ; 松辽平原 ; Songliao Plain
- 页码：p.78-88
- 图表：12 illus., 27 refs.
- 分类号：1200
- issnNo：ISSN0001-5717
- isbnNo：CN11-1951/P
摘要
Based on the seismic, core and logging data, integrated with the characteristics of micro-paleophyte and geochemistry, this study carried out research on high resolution stratigraphy for the Qingshankou Formation, and a regional unconformity of K2qn3 bottom was found in the west slope block, Taikang uplift zone, Longhupao terrace and Binbei block of Songliao Basin. The unconformity can be regarded as an important mark for formation correlation of K2qn2 and K2qn3 in the north and south of Songliao basin and an important theory evidence of the 3rd sequence division. Formation of the unconformity was controlled jointly by differential deposit velocity, and depression velocity of earth crust, belonging to deposition uniformity.