南沙海域构造沉降特征

张云帆; 廖杰; 孙珍; 李付成; 夏斌

doi:10.3799/dqkx.2011.100

Volume 36 Issue 5

Sep. 2011

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ZHANG Yun-fan, LIAO Jie, SUN Zhen, LI Fu-cheng, XIA Bin, 2011. Characteristics of Tectonic Subsidence of Nansha Area. Earth Science, 36(5): 949-955. doi: 10.3799/dqkx.2011.100

Citation:

ZHANG Yun-fan, LIAO Jie, SUN Zhen, LI Fu-cheng, XIA Bin, 2011. Characteristics of Tectonic Subsidence of Nansha Area. Earth Science, 36(5): 949-955. doi: 10.3799/dqkx.2011.100

ZHANG Yun-fan, LIAO Jie, SUN Zhen, LI Fu-cheng, XIA Bin, 2011. Characteristics of Tectonic Subsidence of Nansha Area. Earth Science, 36(5): 949-955. doi: 10.3799/dqkx.2011.100

Citation:

ZHANG Yun-fan, LIAO Jie, SUN Zhen, LI Fu-cheng, XIA Bin, 2011. Characteristics of Tectonic Subsidence of Nansha Area. Earth Science, 36(5): 949-955. doi: 10.3799/dqkx.2011.100

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Characteristics of Tectonic Subsidence of Nansha Area

doi: 10.3799/dqkx.2011.100

1.
CAS Key Laboratory of Marginal Sea Geology, South China Sea Institute of Oceanology, Guangzhou 510301, China
2.
Swiss Fed Inst Tech, Zurich 8092, Switzerland
3.
School of Marine Sciences, Sun Yat-Sen University, Guangzhou 510275, China

Received Date: 2011-04-30
Publish Date: 2011-09-15

Abstract

Abstract

Tectonic subsidence histories of Zengmu basin, Beikang basin, Nanweixi basin and Wan'an basin in Nansha area are analyzed with back-stripping technique.1D tectonic subsidence histories of 24 presumed wells are calculated.The results show that Nansha area experienced 3 main subsiding stages in Cenozoic: (1) Nansha area experienced rifting stage in 40.5—30.0 Ma with a wide range of subsidence.In the first subsiding stage, the max tectonic subsidence rate is 160 m/Ma, which was supposed to be controlled by Xiwei movement. (2) In the second stage (30.0—10.2 Ma), Nansha area ended rifting stage and shifted to depression stage in connection with collision between ancient South China Sea and Borneo.The max tectonic subsidence rate decreased to 20—50 m/Ma. (3) For the third stage (10.2—0 Ma), the regional basins experienced a stage of accelerated subsidence in connection with Nasha movement since Late Miocene.Nansha area experienced regional subsiding stage.
- Nansha area,
- tectonics,
- back-stripping technique,
- subsidence rate,
- marine geology

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References(17)

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