Controls and Formation Mechanism of the Sequences in the Chagan Fault-Depressed Stagnant Lacustrine Depression, Yin-E Basin

GUO Yan-ru

The controlling factors and formation mechanism of the continental sequences are important research field in continental sequence stratigraphy. A fault-depressed stagnant lacustrine basin as a unique basin has its own particular characteristics. In this paper, the author has studied the sedimentary evolution and the base-level changes of the Early Cretaceous fault-depressed stagnant lacustrine basin in Chagan Depression, and then considered that the controlling factors of the sequence in the fault-depressed stagnant lacustrine basin are dominantly the integration of tectonic and climatic factors, and, in the next place, the supply rate of the sediments and lake-level change. Under the control of the double factors, two types of sequences were formed: one was the compound type of fault-depression and climate, and another was climatic type.

Research Institute of Petroleum Exploration and Development, CNPC, Beijing 100083

Received Date: 2003-07-12

Publish Date: 2004-06-10

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Abstract: The controlling factors and formation mechanism of the continental sequences are important research field in continental sequence stratigraphy. A fault-depressed stagnant lacustrine basin as a unique basin has its own particular characteristics. In this paper, the author has studied the sedimentary evolution and the base-level changes of the Early Cretaceous fault-depressed stagnant lacustrine basin in Chagan Depression, and then considered that the controlling factors of the sequence in the fault-depressed stagnant lacustrine basin are dominantly the integration of tectonic and climatic factors, and, in the next place, the supply rate of the sediments and lake-level change. Under the control of the double factors, two types of sequences were formed: one was the compound type of fault-depression and climate, and another was climatic type.

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Controls and Formation Mechanism of the Sequences in the Chagan Fault-Depressed Stagnant Lacustrine Depression, Yin-E Basin

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