Analysis of Tectonic-Sedimentary Setting in Middle and Upper Triassic in the West Margin of the Ordos Basin
详细信息
- 责任者：Yang Hua (State Engineering Laboratory for Exploration and Development of Low Permeability Oil & Gas Field ; Xi’an 710018 ; China) ; Fu Jinhua
- 刊名：Acta Sedimentologica Sinica
- 出版年：2011
- 卷期：29(3)
- 关键词：晚三叠世 ; Upper Triassic ; 环境分析 ; environmental analysis ; 沉积环境 ; sedimentary environment ; 鄂尔多斯盆地 ; Ordos Basin
- 页码：p.427-439
- 图表：15 illus., 3 tables, 39 refs.
- 分类号：0803
- issnNo：ISSN1000-0550
- isbnNo：CN62-1038/P
摘要
Based on the data analysis of sandstone detrital fragments,heavy mineral assemblages, geochemistry, composition of conglomerates, paleocurrent and tectonic deformation, it is indicated that the provenance and tectonic-sediment setting is different in different areas in the west margin of Ordos Basin. The deposition of the Upper Triassic in Helan Mountain occurred in craton, and its source areas belonged to the Alxa massif and Bayanhaote Basin, paleocurrent was from west to east, sedimentary setting is from fan-belt to lake setting and Helan Mountain was rift basin in the Upper Triassic. The Upper Triassic sedimentation is tremendous, about 3 000 m in Shigouyi area. Based on the comprehensive analysis, it is suggested that the provenance and tectonic-sedimentation was different in different areas in the west margin of Ordos Basin, and being not uniform foreland basin simply.