与挠曲作用相关的一种特殊裂缝形成机制

董有浦; 肖安成; 吴磊; 毛黎光; 徐波

doi:10.3799/dqkx.2013.073

Volume 38 Issue 4

Jul. 2013

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DONG You-pu, XIAO An-cheng, WU Lei, MAO Li-guang, XU Bo, 2013. Mechanism of Formation of Special Fold Accommodation Fractures. Earth Science, 38(4): 755-762. doi: 10.3799/dqkx.2013.073

Citation:

DONG You-pu, XIAO An-cheng, WU Lei, MAO Li-guang, XU Bo, 2013. Mechanism of Formation of Special Fold Accommodation Fractures. Earth Science, 38(4): 755-762. doi: 10.3799/dqkx.2013.073

DONG You-pu, XIAO An-cheng, WU Lei, MAO Li-guang, XU Bo, 2013. Mechanism of Formation of Special Fold Accommodation Fractures. Earth Science, 38(4): 755-762. doi: 10.3799/dqkx.2013.073

Citation:

DONG You-pu, XIAO An-cheng, WU Lei, MAO Li-guang, XU Bo, 2013. Mechanism of Formation of Special Fold Accommodation Fractures. Earth Science, 38(4): 755-762. doi: 10.3799/dqkx.2013.073

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Mechanism of Formation of Special Fold Accommodation Fractures

doi: 10.3799/dqkx.2013.073

DONG You-pu^{1, 2, 3
,},
XIAO An-cheng^{2, 3
,
,},
WU Lei^{2, 3},
MAO Li-guang^{2, 3},
XU Bo^{2, 3}

1.
Department of Earth Sciences, Faculty of Land Resource Engineering, Kunming University of Science and Technology, Kunming 650093, China
2.
Department of Earth Sciences, Zhejiang University, Hangzhou 310027, China
3.
Research Center for the Structures in Oil and Gas Bearing Basin, Ministry of Education, Hangzhou 310027, China

Received Date: 2012-10-21
Publish Date: 2013-07-01

Abstract

Abstract

To explore the relationship between the formation of fractures and the deformation of strata, fractures data from outcrops in the Upper Jurassic strata of Lin'an are integrated with geometry modeling in this study. It is found that two main type fractures are secondary structures to the fold, which are referred to as fold accommodation fractures in this paper, and named as D and D' fractures respectively. An angle ranging 44°-80° exists between fractures and stratum layers, with D' fracture directing the motion of local layer and D fracture directing the motion of adjacent layer. The fractures formed primarily because of an increase in bed curvature within fold cores. The relationship between fracture density and layer thickness is established on the basis of geometrical analysis of the fold and we find that fractures density is proportional to the layer thickness.
- fold accommodation fractures,
- outcrop,
- geometry modeling,
- mechanism,
- structural geology

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References(29)

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