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AAPG Bulletin

Abstract

AAPG Bulletin, V. 95, No. 1 (January 2011), P. 1-26.

Copyright copy2011. The American Association of Petroleum Geologists. All rights reserved.

DOI:10.1306/06301009207

Fault growth and linkage: Implications for tectonosedimentary evolution in the Chezhen Basin of Bohai Bay, eastern China

Jinbao Su,1 Wenbin Zhu,2 Jia Wei,3 Leiming Xu,4 Yanfeng Yang,5 Zhiqiang Wang,6 Zhiyong Zhang7

1State Key Laboratory for Mineral Deposits Research (Nanjing University), School of Earth Sciences and Engineering, Nanjing University, Nanjing 210093, China; [email protected]
2State Key Laboratory for Mineral Deposits Research (Nanjing University), School of Earth Sciences and Engineering, Nanjing University, Nanjing 210093, China; [email protected]
3Sinopec Geophysical Research Institute, Nanjing 210014, China
4Sinopec Geophysical Research Institute, Nanjing 210014, China
5Geological Institute of the Hekou Oil Production Plant, Shengli Oilfield, Sinopec, Dongying 257068, China
6Geological Institute of the Hekou Oil Production Plant, Shengli Oilfield, Sinopec, Dongying 257068, China
7State Key Laboratory for Mineral Deposits Research (Nanjing University), School of Earth Sciences and Engineering, Nanjing University, Nanjing 210093, China

ABSTRACT

The Chezhen Basin has highly representative structural features of the Jiyang depression, Bohai Bay area. The structural geometry and the boundary fault linkage exert a strong influence on basin development and depositional environment. Based on structural analysis, at least six early fault segments are identified in the northern boundary of the Chezhen Basin. These fault segments are important in controlling stratal architecture and distribution. The antecedent structures controlled subbasin initiation and development. The Cenozoic rift initiated in the early Eocene with the development of six isolated fault segments associated with deposition of the Es4 member. During the deposition of the lower Es3 member, these six fault segments quickly linked and formed the present architecture frame. Fault linkage has not resulted in a redistribution of displacement. With the expansion of the Chezhen Basin, the depocenters of the upper strata were kept in nearly the same sites until the early Miocene, then the activity of the Chengnan fault ceased. Fault linkage is a significant event in basin evolution, and its process may be very rapid. However, the fault linkage exerted considerable control on sedimentation and evolution of the basin. This study demonstrates that it is necessary to integrate structural and stratigraphic data to reconstruct the temporal and spatial evolution of normal fault zones.

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