软弱地质体对挤压构造变形影响的物理模拟及其应用

徐子英; 孙珍; 周蒂; 张云帆; 孙龙涛; 赵中贤; 李付成

doi:10.3799/dqkx.2011.097

Volume 36 Issue 5

Sep. 2011

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Article Navigation > Earth Science > 2011 > 36(5): 921-930

XU Zi-ying, SUN Zhen, ZHOU Di, ZHANG Yun-fan, SUN Long-tao, ZHAO Zhong-xian, LI Fu-cheng, 2011. Discussion on the Influence of Weakness Body on Compression Structure Deformation Through Analogue Modeling and Its Application. Earth Science, 36(5): 921-930. doi: 10.3799/dqkx.2011.097

Citation:

XU Zi-ying, SUN Zhen, ZHOU Di, ZHANG Yun-fan, SUN Long-tao, ZHAO Zhong-xian, LI Fu-cheng, 2011. Discussion on the Influence of Weakness Body on Compression Structure Deformation Through Analogue Modeling and Its Application. Earth Science, 36(5): 921-930. doi: 10.3799/dqkx.2011.097

Citation:

XU Zi-ying, SUN Zhen, ZHOU Di, ZHANG Yun-fan, SUN Long-tao, ZHAO Zhong-xian, LI Fu-cheng, 2011. Discussion on the Influence of Weakness Body on Compression Structure Deformation Through Analogue Modeling and Its Application. Earth Science, 36(5): 921-930. doi: 10.3799/dqkx.2011.097

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Discussion on the Influence of Weakness Body on Compression Structure Deformation Through Analogue Modeling and Its Application

doi: 10.3799/dqkx.2011.097

XU Zi-ying^{1, 2},
SUN Zhen^{1
,
,},
ZHOU Di¹,
ZHANG Yun-fan¹,
SUN Long-tao¹,
ZHAO Zhong-xian^{1, 2},
LI Fu-cheng^{1, 2}

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 100049, China

Received Date: 2011-05-28
Publish Date: 2011-09-15

Abstract

Abstract

To investigate the influence of weakness body on compression, we carry out six sets of analogue modeling experiments to study the impact of size, location as well as the force direction of weakness body on structural deformation.Based on the modeling results, effects of weakness body on compression structure deformation in the Yinggehai and Qiongdongnan basin are discussed.Experiments show that during compression, uplift first appears and propagates rapidly in area with weakness body, then the uplift appears in non-weakness body, the uplift area in weakness body is bigger than that in area without weakness body, and its fold deformation is stronger than that of non-weakness body.With larger weakness body, the deformation region of weakness body becomes bigger, and the deformation gets stronger.However, the deformation region of non-weakness body stays stable.When the weakness body is located closer to compressive boundary, the deformation of compressive structures appears earlier and stronger; otherwise the deformation is later and weaker.The compressive deformation is stronger under normal compression than that under oblique compression.By experimental modeling, we conclude that the features of compression fold in middle sag of Yinggehai basin and Qiongdongnan basin may be related with distance of oblique compress boundary and the existence of weakness body, and the oblique compress stress comes from sinistral slip of Indochina block.Some fold size is connected with initial size of weakness body.
- Qiongdongnan basin,
- Yinggehai basin,
- weakness body,
- tectonics,
- analogue modeling,
- marine geology

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References(41)

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