Geological Age and Paleoenvironmental Significance of the Upper Part of Middle Member of the Anjihaihe Formation on Southern Margin of Junggar Basin, Xinjiang
详细信息
- 责任者：Zhou Chunmei (Exploration and Development Research Institute ; Xinjiang Oil field Company ; PetroChina ; Karamay 834000 ; China) ; Cheng Jinhui
- 刊名：Journal of Stratigraphy
- 出版年：2012
- 卷期：36(4)
- 关键词：古近纪 ; Paleogene ; 生物地层学 ; biostratigraphy ; 古环境 ; paleoenvironment ; 准噶尔盆地 ; Junggar Basin
- 页码：p.723-732
- 图表：4 illus., 1 table, 21 refs.
- 分类号：1200
- issnNo：ISSN0253-4959
- isbnNo：CN32-1187/P
摘要
This paper investigates dinoflagellates extracted from about 100 samples from the upper part of the Middle Member of Anjihaihe Formation at 12 outcrops and boreholes on southern edge of the Junggar Basin. 52 genera and 93 species were identified, and one assemblage zone with two subzones was recognized. According to the dinoflagellate assemblage, the authors infer that the studying area was obviously influenced by warm sea water when the upper part of the Middle Member of Anjihaihe Formation was deposited. However, the existence of a large number of Pediastrum indicates deposition in a brackish environmental.