Analysis on Controls of the Coal Accumulation in the Jurassic Badaowan Formation, Junggar Basin

HE Zhi-ping; SHAO Long-yi; KANG Yong-shang; LIU Yong-fu; LUO Wen-lin; QI Xue-feng

According to the thickness and distribution of coals in a sequence stratigraphic framework, the influence of depositional environments, the evolution of depositional system and the fluctuation of lake-level on the coal accumulation, during the deposition of Jurassic Badaowan formation in Junggar basin, has been discussed. The favorable settings for coal accumulation were the interdelta bay, fluvial plain and delta plain during the earlier Jurassic in Junggar basin, which always kept the balance between the rate of peat accumulation and the rate of accommodation creation, and acted as the expressing form of the basic control of the coal accumulation. In fact, the basic control on coal accumulation was the rate of accommodation increase mainly controlled by the fluctuation of relative lake-level for the Jurassic Badaowan formation in Junggar basin.

1. The Key Laboratory of Coal Resource, Education Ministry of China, China University of Mining & Technology, Beijing 100083;

2. The Key Laboratory of Petroleum and Gas Accumulation Mechainism, University of Petroleum,Beijing 102249;

3. Resources & Information College, University of Petroleum, Beijing 102249;

4. Institute of Exploration and Development of Petroleum, Petro China, Karamay Xinjiang 834000

Received Date: 2003-07-02

Rev Recd Date: 2003-09-03

Publish Date: 2004-09-10

Key words:

Abstract: According to the thickness and distribution of coals in a sequence stratigraphic framework, the influence of depositional environments, the evolution of depositional system and the fluctuation of lake-level on the coal accumulation, during the deposition of Jurassic Badaowan formation in Junggar basin, has been discussed. The favorable settings for coal accumulation were the interdelta bay, fluvial plain and delta plain during the earlier Jurassic in Junggar basin, which always kept the balance between the rate of peat accumulation and the rate of accommodation creation, and acted as the expressing form of the basic control of the coal accumulation. In fact, the basic control on coal accumulation was the rate of accommodation increase mainly controlled by the fluctuation of relative lake-level for the Jurassic Badaowan formation in Junggar basin.

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Reference (16)

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Analysis on Controls of the Coal Accumulation in the Jurassic Badaowan Formation, Junggar Basin

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