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Sedimentary Dynamic Analysis of Sequence Structure and Stacking Pattern of Base-Level Cycle

ZHENG Rong cai 1 YIN Shi ming 2 PENG Jun 1 1(Chengdu University of Technology,Institute of Sedimentary Geology Chengdu 610059) 2(South-West Bureau of Petroleum Geology,Zigong Sichuan 634000)  
The sedimentary dynamic analysis of sequence structure and stacking pattern of base-level cycle is one of the most important contents to integrate and apply the theory and technology of high-resolution sequence stratigraphy.In this paper,the author takes the stratigraphic and sedimentary process-response dynamic principles as a theoretical basis, middle term base-level cycle as a period and short term base-level cycle as a genetic stratigraphic unit to discuss the relationship between the sequence structure ,the sequence stacking pattern,the ratio variation of accommodation space to sedimentary alimentation (A/S ),the rise or fall range of base-level and the sedimentary dynamic condition.It shows that the short term base-level cycles with different sequence structure and stacking pattern distribute regularly in the middle term base-level cycle, and suggests the standard section architecture of the middle term base-level cycle.It is very significance that the sedimentary dynamic analysis on the sequence structure and stacking pattern of short or middle term base-level cycle in terms of theory mentioned above is completely consistent with the application aspects of the high-resolution sequence stratigraphy of the Mesozoicor Cenozoic terrestrial stratigraphy in Sichuan Basin,Ordos Basin and Liaohe Basin and so on and proves that the theoretical systerm and the analytical technology of the high-resolution sequence stratigraphy and completely adapted to employ the sequence research of the Mesozoic or Cenozoic terrigenous oil-bearing basins developed widely in China.
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