石油与天然气地质 ›› 2018, Vol. 39 ›› Issue (5): 932-942.doi: 10.11743/ogg20180508

• 油气勘探 • 上一篇    下一篇

准噶尔盆地东部构造地层层序及盆地演化

易泽军, 何登发   

  1. 中国地质大学(北京) 能源学院, 北京 100083
  • 收稿日期:2018-05-15 修回日期:2018-07-11 出版日期:2018-10-28 发布日期:2018-09-06
  • 作者简介:易泽军(1987-),男,博士研究生,矿产普查与勘探。E-mail:dkyzj2010@163.com。
  • 基金资助:
    国家科技重大专项(2017ZX05001-001);中国地质调查局地质调查工作项目(1211302108019-1)。

Tectono-stratigraphic sequence and basin evolution of the eastern Junggar Basin

Yi Zejun, He Dengfa   

  1. School of Energy Resources, China University of Geosciences(Beijing), Beijing 100083, China
  • Received:2018-05-15 Revised:2018-07-11 Online:2018-10-28 Published:2018-09-06

摘要: 准噶尔盆地东部自石炭纪以来经历了多期构造运动,沉积中心发生了多次迁移,地层遭受多期剥蚀。为揭示地层和盆地演化的关系,在全盆覆盖的地震剖面解释的基础上,刻画了不整合面的分布范围,分析了不整合面形成时的构造动力学条件。结果表明,准噶尔盆地东部存在下石炭统顶部、中二叠统底部、白垩系底部、古近系底部和新近系底部5套区域性不整合面。这5套区域不整合面将准噶尔盆地东部石炭系—第四系划分为下石炭统构造层和上石炭统—下二叠统构造层、中二叠统—侏罗系构造层、白垩系构造层、古近系构造层和新近系—第四系构造层6大构造层。自晚石炭世到第四纪,准噶尔盆地东部一共经历了5个演化阶段。晚石炭世准噶尔盆地东部进入陆内构造变形旋回,陆相盆地的雏形形成于海西期,中生代—新生代又叠加了印支运动、燕山运动和喜马拉雅运动。克拉美丽山和博格达山的多期分段活动,盆内断层多次复活是多套构造层叠置和盆地多阶段演化的直接原因。

关键词: 不整合面, 构造层, 盆地演化, 叠合盆地, 石炭纪, 准噶尔盆地

Abstract: The east of Junggar Basin has undergone multi-stage tectonic movements since the Carboniferous.Its sedimentary center migrated several times and the strata suffered multiple stage erosion.In order to reveal the relationship between stratigraphy and basin evolution,we described the distribution of unconformity based on the interpretation of seismic profile covering the whole basin,and analyzed the tectonic dynamic conditions during unconformity formation.The results show that there are five regional unconformities in the eastern Junggar Basin.They are respectively located on top of the Lower Carboniferous,and at the bottom of the Middle Permian,the bottom of the Cretaceous,the bottom of the Paleogene and the bottom of the Neogene.Accordingly,the Carboniferous-Quaternary of the eastern Junggar Basin can be subdivided into six tectonic layers,namely the Lower Carboniferous,Upper Carboniferous-Lower Permian,Middle Permian-Jurassic,Cretaceous,Paleogene,and Neogene-Quaternary structural layers.From the Late Carboniferous to the Quater-nary,the area experienced five evolutionary stages in total.In the Late Carboniferous,the intra-continental tectonic defor-mation cycles appeared in the area;in the Hercynian,the continental basin formed initially,and in the Mesozoic-Cenozoic, superimposition of the Indosinian,Yanshan and Himalayan movements occurred in a row.The multi-phased and multi-section activities of Kelameili Mountain and Bogda Mountain,and the repeated reactivation of faults within the basin directly led to the tectonic layer superimposition and multistage evolution of Junggar Basin.

Key words: unconformity, tectonic layer, basin evolution, superimposed basin, Carboniferous, Junggar Basin

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