南沙海域新生代构造特征和沉降演化

赵中贤; 孙珍; 陈广浩; 张云帆

doi:10.3799/dqkx.2011.084

Volume 36 Issue 5

Sep. 2011

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ZHAO Zhong-xian, SUN Zhen, CHEN Guang-hao, ZHANG Yun-fan, 2011. Cenozoic Structural Characteristics and Subsidence Evolution in Nansha. Earth Science, 36(5): 815-822. doi: 10.3799/dqkx.2011.084

Citation:

ZHAO Zhong-xian, SUN Zhen, CHEN Guang-hao, ZHANG Yun-fan, 2011. Cenozoic Structural Characteristics and Subsidence Evolution in Nansha. Earth Science, 36(5): 815-822. doi: 10.3799/dqkx.2011.084

ZHAO Zhong-xian, SUN Zhen, CHEN Guang-hao, ZHANG Yun-fan, 2011. Cenozoic Structural Characteristics and Subsidence Evolution in Nansha. Earth Science, 36(5): 815-822. doi: 10.3799/dqkx.2011.084

Citation:

ZHAO Zhong-xian, SUN Zhen, CHEN Guang-hao, ZHANG Yun-fan, 2011. Cenozoic Structural Characteristics and Subsidence Evolution in Nansha. Earth Science, 36(5): 815-822. doi: 10.3799/dqkx.2011.084

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Cenozoic Structural Characteristics and Subsidence Evolution in Nansha

doi: 10.3799/dqkx.2011.084

1.
CAS Key Laboratory of Marginal Sea Geology, South China Sea Institute of Oceanology, Guangzhou 510301, China
2.
Graduate University of Chinese Academy of Sciences, Beijing 100039, China

Received Date: 2011-05-02
Publish Date: 2011-09-15

Abstract

Abstract

Tectonic evolution in Nansha is analyzed by depicting the faults and calculating the tectonic subsidence along 5 profiles across Nansha.The study shows the following results: 1.T₆₀ (23.8 Ma) is an important tectonic transformation boundary (except for the region around Youngshu basin) because most normal faults have been activated until sequence boundary T₄₀ (16 Ma) or T60 (23.8 Ma) and subsidence curves across the region are characterized by syn-rift basin before T₆₀ (23.8 Ma) and post-rift basin after that.2.The Southeast of Nansha is the outstanding topography with a combination of a NE-SW belt of high subsidence along Nansha trough and its NE elongating zone with a NE-SW belt of thrust to the Southeast indicating there is a stress reverse in T₄₀ boundary.3.There is high subsidence period since 5.3 Ma which may relate to the weakness of compression to the SE of Nansha.
- tectonics,
- subsidence,
- Cenozoic,
- Nansha,
- marine geology

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References(29)

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