走滑环境中陆相盆地充填层序特征以云南先锋盆地为例
- 收稿日期:
1996-07-12
- 刊出日期:
1997-12-10
摘要: 走滑陆相盆地在构造背景、沉积范围、物源供应方式、基底地形特征、沉积物特点和沉积层序特征方面均与大陆边缘海相盆地有重要区别，通常具有多物源、多沉积体系、相带窄、相变快的特点。本文在对云南先锋盆地充填序列、沉积格架、构造格架和区域构造背景分析基础上，讨论了在走滑构造背景下陆相盆地的一系列特征以及走滑型陆相盆地的层序地层特点.
The Sequence Stratigraphical Fcatures of the Intracontinental Strike-Slip Basin—— Xianfeng Basin in Yunnan Province, Southwest China
- 1 University of Petroleum,China,Beijing,100083;
- 2 China's University of Mining and Technology,Xuzhou
- Received Date:
1996-07-12
- Publish Date:
1997-12-10
Abstract: The difference between intracontinental basin and marginal basin exists in many aspects, such astectonic settings, depositional scale, infilling pattern, paleomotography, sediment components and sedi-mentary sequences.The intracontinental basin is characterized by multi-sedinent-sources, multi-sediment| system, narrow lateral facies extension and rapid facies alternation.The Xianfeng basin is a Tertiaryfaulted intracontinental basin in Yunnan Province, Southwest China.This paper studied its infilling se-quence, sedimentary framework, structure framework and the loacal tectonic setting.Furthermore, thefeatures of an intracontinental basin under a strike-slip tectonic setting and the sequence characters werediscussed.Bwsides the features appearing in all inland basins, the Xianfeng basin showed a clear strike-slip character.it controlled the variation of accomadtion and the evolution of sediment source providingpattern.The infilling sequences were charactorized by the migration of the depositional cen along theboundary faults, the lateral onlap of sediment system and the active infilling along the mqjor axis of thebasin.Through carefully study, four types of sruface have been recognized to divide the sequence and thesystem tracts: tectogenesis surface(TCS), tectonic stress field transition surface(T TS).large-scale flood-ing surface(FDS) and coal bed surface(CBS).On the basis of sequence surfaces listed the above, the in-filling sequence could be divided into two sequences.LST, TST, HST and AST were recognized.Coal-bearing sequences were well developed in the Xianfeng basin, mainly appearing in the upper part of LSTand HST.Coal bed M 8 spreaded on a whole basin scale with the depth as thick as 236.6m.As we allknow, a coal bed is a sensitive indicator which reflects the fluctuation of alke surface and water depth.Therefore, the locally spreaded coal beds are the ideal surfaces to determine a parasequence and parase-quence sets.in addition, it should be pointed out that the tectonic movement plays a great role in tehbasin infilling including tectonic subsidence, strike-slip movement and tectonic inversion.
张强, 邵震杰. 走滑环境中陆相盆地充填层序特征以云南先锋盆地为例[J]. 沉积学报, 1997, 15(4): 30-37.
| 引用本文: |
张强, 邵震杰. 走滑环境中陆相盆地充填层序特征以云南先锋盆地为例[J]. 沉积学报, 1997, 15(4): 30-37.
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Zhang Qiang, Shao Zhenjie. The Sequence Stratigraphical Fcatures of the Intracontinental Strike-Slip Basin—— Xianfeng Basin in Yunnan Province, Southwest China[J]. Acta Sedimentologica Sinica, 1997, 15(4): 30-37.
| Citation: |
Zhang Qiang, Shao Zhenjie. The Sequence Stratigraphical Fcatures of the Intracontinental Strike-Slip Basin—— Xianfeng Basin in Yunnan Province, Southwest China[J]. Acta Sedimentologica Sinica, 1997, 15(4): 30-37.
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