Tectonic subsidence history and dynamic mechanism of the Dongsha rise in the Zhujiang River Mouth Basin

LIU An; WU Shi-min; CHENG Wei-hua

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LIU An, WU Shi-min, CHENG Wei-hua. Tectonic subsidence history and dynamic mechanism of the Dongsha rise in the Zhujiang River Mouth Basin[J]. Haiyang Xuebao, 2011, 33(6): 117-124.

Citation:

LIU An, WU Shi-min, CHENG Wei-hua. Tectonic subsidence history and dynamic mechanism of the Dongsha rise in the Zhujiang River Mouth Basin[J]. Haiyang Xuebao, 2011, 33(6): 117-124.

LIU An, WU Shi-min, CHENG Wei-hua. Tectonic subsidence history and dynamic mechanism of the Dongsha rise in the Zhujiang River Mouth Basin[J]. Haiyang Xuebao, 2011, 33(6): 117-124.

Citation:

LIU An, WU Shi-min, CHENG Wei-hua. Tectonic subsidence history and dynamic mechanism of the Dongsha rise in the Zhujiang River Mouth Basin[J]. Haiyang Xuebao, 2011, 33(6): 117-124.

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Tectonic subsidence history and dynamic mechanism of the Dongsha rise in the Zhujiang River Mouth Basin

1.
Department of Earth Science, Sun Yat-sen University, Guangzhou 510275,China;Wuhan Institute of Geology and Mineral Resources, Wuhan 430205, China
2.
Department of Earth Science, Sun Yat-sen University, Guangzhou 510275,China
3.
Shenzhen Branch of China National Offshore Oil Corporation Guangzhou 510240, China

Received Date: 2009-04-16
Rev Recd Date: 2011-06-20

Abstract

Abstract

Based on the 1-D tectonic subsidence analysis of Dongsha rise and adjacent area, combined with the previous researches on basement, faults, subsidence, it is proposed that the tectonic evolution history of Dongsha rise can be divided into five stages:compression setting in Cretaceous; initial extension in Paleocene to early Oligocene; denudation at the end of early Oligocene; quick thermal subsidence in later Oligocene to Miocene; fault block adjustment from later Miocene. The high velocity layer in the lower crust is the main cause of the Dongsha rise uplifting and erosion in the early Oligocene,but it has no appavent relationship with magnetic quiet zone and high magnetic zone.
- South China Sea,
- Zhujiang River Mouth Basin,
- Dongsha Rise,
- tectonic subsidence,
- dynamic mechanism

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References(29)

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