库车坳陷脆性构造序列及其对构造古应力的指示

张仲培; 王清晨; 王毅; 李铁军

Volume 31 Issue 3

May 2006

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ZHANG Zhong-pei, WANG Qing-chen, WANG Yi, LI Tie-jun, 2006. Brittle Structure Sequence in the Kuqa Depression and Its Implications to the Tectonic Paleostress. Earth Science, 31(3): 309-316.

Citation:

ZHANG Zhong-pei, WANG Qing-chen, WANG Yi, LI Tie-jun, 2006. Brittle Structure Sequence in the Kuqa Depression and Its Implications to the Tectonic Paleostress. Earth Science, 31(3): 309-316.

ZHANG Zhong-pei, WANG Qing-chen, WANG Yi, LI Tie-jun, 2006. Brittle Structure Sequence in the Kuqa Depression and Its Implications to the Tectonic Paleostress. Earth Science, 31(3): 309-316.

Citation:

ZHANG Zhong-pei, WANG Qing-chen, WANG Yi, LI Tie-jun, 2006. Brittle Structure Sequence in the Kuqa Depression and Its Implications to the Tectonic Paleostress. Earth Science, 31(3): 309-316.

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Brittle Structure Sequence in the Kuqa Depression and Its Implications to the Tectonic Paleostress

1.
Institute of Petroleum Exploration and Development, SINOPEC, Beijing 100083, China
2.
School of Energy Resources, China University of Geosciences, Beijing 100083, China
3.
Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China

Received Date: 2005-06-29
Publish Date: 2006-05-25

Abstract

Abstract

In order to understand the time-space changes of the Cenozoic tectonic paleostress in the Kuqa depression, detailed field observations and measurements were carried out. Paleostress evolution history is discussed from the Late Cretaceous, according to the relationship between brittle structures and stresses. Their sequence relation is inferred from field investigations and the calculated results indicate that the early ENE-WSW systematic joints caused by regional uplifting were cut and reworked by late NNW-SSE and NW-SE systematic joints. This corresponds to the change of regional stresses from weak extension to strong compression since the beginning of the Neogene.Resultsof paleostress inversion based on large amounts of fault-slip data display a stress pattern with near N-S extension on the basin margin and NW-SE compression in the basin interior. So at the beginning of the Neogene, the stress field changed and the maximal principal stress σ₁ switched from vertical to horizontal. The rapid vertical uplifting of the Tianshan Mountains might be responsible for the stress difference between the basin range and interior.
- brittle structures,
- joint,
- fault,
- paleostress,
- Kuqa depression

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References(33)

References

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Brittle Structure Sequence in the Kuqa Depression and Its Implications to the Tectonic Paleostress

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