Extensional structures and basin evolution of the Wunite depression in Erlian Basin

MIAO Quan-yun; QI Jia-fu; XIAO Yang; WANG Li-shuang; ZENG Ting; ZHANG Jie

doi:10.12029/gc20160614

2016 Vol. 43, No. 6

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Article navigation > Geology in China > 2016 > (6): 2036-2045

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MIAO Quan-yun, QI Jia-fu, XIAO Yang, WANG Li-shuang, ZENG Ting, ZHANG Jie. Extensional structures and basin evolution of the Wunite depression in Erlian Basin[J]. Geology in China, 2016, (6): 2036-2045. doi: 10.12029/gc20160614

Citation:

MIAO Quan-yun, QI Jia-fu, XIAO Yang, WANG Li-shuang, ZENG Ting, ZHANG Jie. Extensional structures and basin evolution of the Wunite depression in Erlian Basin[J]. Geology in China, 2016, (6): 2036-2045. doi: 10.12029/gc20160614

Extensional structures and basin evolution of the Wunite depression in Erlian Basin

1.
College of Geosciences, China University of Petroleum, Beijing 102249, China
2.
College of Geosciences, China University of Petroleum, Beijing 102249, China;State Key Laboratory of Petroleum Resource and Prospecting, China University of Petroleum, Beijing 102249, China
3.
Huabei Oil Company, PetroChina, Renqiu 062552, Hebei, China

Received Date: 02 October 2015

Revised Date: 10 December 2015

Publish Date: 24 December 2016

Abstract

Abstract

The Wunite depression is one of the five depressions in the Erlian Basin. A series of grabens/half grabens were developed under the action of regional extension in Early Cretaceous. Extensional fault and transform structure form the extensional structures. The major boundary faults (MBF) are listric faults, slipping deep in the mélange zone and being shallow in complex synclines. The MBF extends like a simple arc or a wave. Accommodating/propagating displacement is realized through transfer fault or strike ramp. Divergent TZ and convergent are the main transfer structures between faulted-sags. And the MBF tendency often changes through the divergent or convergent TZ. In the early Early Cretaceous, lots of independent small-scale faulted-sags filled Wunite Depression; in middle Early Cretaceous, with the continuing of extension, adjacent faults were laterally propagating to become the regional boundary fault and adjacent faulted-sags were connected to become the complex faulted-sag; in late Early Cretaceous, the depression entered into the post-rifting stage.
- extensional structures /
- basin evolution /
- Wunite depression /
- Erlian Basin.