Types of Sequences, Controlling Factors and Sequence Models for Lower Cretaceous of Tanan Depression in <?xml:namespace prefix = st1 ns = "urn:schemas-microsoft-com:office:smarttags" /><st1:place w:st="on"><st1:City w:st="on">Tamtsag Basin</st1:City>, <st1:country-region w:st="on">Mongolia</st1:country-region></st1:place> <?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" /><o:p></o:p>

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Types of Sequences, Controlling Factors and Sequence Models for Lower Cretaceous of Tanan Depression in Tamtsag Basin, Mongolia

详细信息

责任者：Yang Yonghua (State Key Laboratory of Petroleum Resource and Prospecting ; China University of Petroleum ; Beijing 102249 ; China) ; Ji Youliang
刊名：Geoscience
出版年：2009
卷期：23(4)
关键词：早白垩世 ; Lower Cretaceous ; 层序地层学 ; sequence stratigraphy ; 蒙古 ; Mongolia
页码：p.655-666
图表：11 illus., 18 refs.
分类号：1200
issnNo：ISSN1000-8527
isbnNo：CN11-2035/P

摘要

In this paper, based on the principle of sequence stratigraphy, the sequences in Lower Cretaceous of Tanan Depression in Tamtsag Basin, Mongolia are discriminated and correlated according to well logging and seismic data, and four third-order sequences (SQ₁-SQ₄) are identified. On the basis of these results, the characteristics of sequence structures are studied and the types of sequences are classified through analysis of the tectonic evolution features: SQ₁ and SQ₂ are sequences of initial rift lacustrine basin, SQ₃ is a sequence of maximum rift lacustrine basin, and SQ₄ is a sequence of post rift lacustrine basin. The sequence structures are mainly controlled by tectonic subsidence patterns. The development and distribution of stratigraphic and lithologic traps are distinct in different sequence models.

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