Joint development in perturbed stress fields near faults

Rawnsley, Keith; Rives, T.; Petti, Jason P.; Hencher, Steve; Lumsden, A.C.

doi:10.1016/0191-8141(92)90025-r

Cited by 149 publications

(48 citation statements)

References 27 publications

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“…However, it is important to keep in mind that different directions of stresses or superposed stress states do not necessarily indicate polyphase tectonics. Stresses may show local deflections (e.g., Rawnsley et al, 1992;Rebaï et al, 1992;Petit and Mattauer, 1995;Homberg et al, 1997;Kattenhorn et al, 2000) or rapidly vary in a locality (e.g., Hauksson, 1994;Homberg et al, 1999;Bergerat and Angelier, 2000;Homberg, 2000) even if the overall state of stresses is homogeneous. Relative chronologies are the most factor in assigning deviated stress states to otherwise homogeneous stress field.…”

Section: Stress Field and Large-scale Faultingmentioning

confidence: 99%

Structural inheritance and cenozoic stress fields in the Jura fold-and-thrust belt (France)

et al. 2002

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Based on an analysis of 8000 minor fault-slip data in the Jura Mountains (France), we discuss the influence of pre-existing discontinuities on the development of fold-and-thrust belts. We present palinspastic maps showing the stress fields and active faults during the Cenozoic pre-orogenic events in the Jura belt prior to the main Late Miocene fold-and-thrust tectonics. During the Eocene, a N -S strike-slip regime produced a few NNE -SSW sub-vertical strike-slip faults in the central external Jura and a few E -W reverse faults in the eastern Jura near the future frontal thrust. During the Oligocene, an average WNW -ESE extension, with irregular stress trajectories, resulted in normal faulting along N -S to NE -SW trends in the external part of the belt, WNW -ESE trends along the future northern and northeastern frontal thrust, and NW -SE trends in the internal Jura. The Late Miocene tectonics began with a strike-slip regime with a fan-shaped compressional trajectory. It was followed by a stress field with similar stress direction, but local r 2 /r 3 stress permutation resulted in strike-slip regime domains contrasting with reverse regime domains. Stress deflections and permutations occurred near inherited cover and basement discontinuities. Major deformation zones, like the Jura frontal thrust onto the foreland, the thrust of the internal central Jura onto the external Jura, and the narrow deformation bands within the flat-lying plateaus formed close to the inherited faults. The structural style of the Jura belt thus partly mimics the pre-orogenic fault pattern. Stress deflections point to the pre-orogenic faults, express the indentation process of the Jura by its hinterland, and highlight successive slip events along major faults during the fold-and-thrust tectonics. This case study illustrates the relevance of minor fault-slip studies for characterizing both the pre-orogenic tectonics and the kinematics of the deformation. D

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Section: Stress Field and Large-scale Faultingmentioning

confidence: 99%

Structural inheritance and cenozoic stress fields in the Jura fold-and-thrust belt (France)

et al. 2002

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“…The outcrop analogue in Yorkshire, next to the Sole Pitt Basin and subject to a similar tectonic evolution, points to possible development of such network hierarchy and topology in the arrangement of the different Flt-Frc subsets. The outcrop analogue case exhibits fracture networks that were formed most probably under a Tertiary N-S compression stress regime with fracture development both syn and post Tertiary folding and faulting (Rawnsley et al, 1992). The similar larger tectonic evolution of the Yorkshire and Dutch offshore translation of these constraints for populating the input model with a perceivable smaller order fracture-fault network.…”

Section: Resultsmentioning

confidence: 99%

Fracture-fault Networks and Role of Nested Topology on the Mechanical Response and Connectivity for Tight Gas Extraction

Hardebol¹,

Bertotti²

2014

Proceedings

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SUMMARYOur aim is to quantify the role of intermediate length scale pre-existing faults and fractures on the critical loading of first order faults and on the potential for enhancement of fracture network. The arrangement of smaller scale natural fractures relative to larger-scale faults is subject of our combined outcrop and numerical modelling study. In this study we perform finite element geomechanical simulation to quantify mechanical response in terms of loading and failure of complex network of pre-existing fault and fracture planes. The first and intermediate order faults and fractures are included in the mechanical models by means of Discrete Surface Networks. The structural configuration of the Dutch SE North Sea P6 block inspired the definition of the first order faults of our geologic input model for mechanical simulations. The analyses of first and smaller order fault patterns of the North Sea subsurface case were combined with the detailed fracture observations from our outcrop analogue. Differently from previous studies, this work addresses the length scales between larger scale tectonic models that account mainly for the horst-bounding faults and the detailed studies that address stresses at and around boreholes.

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“…Arrays of cross joints typically resemble a "ladderlike" pattern in outcrop [Rawnsley et al, 1992] because cross joints are limited in length by the intervening distance between older systematic joints. Additionally, cross-joint spacing often correlates with the spacing of preexisting joints because the latter serve as mechanical layer boundaries [Gross, 1993].…”

Section: Introductionmentioning

confidence: 99%

Theoretical analysis of cross‐joint geometries and their classification

Bai¹,

Gross²

1999

J. Geophys. Res.

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Abstract. One commonly observed bedrock joint pattern consists of cross joints that terminate against an older set of longer systematic joints. Dyer [ 1988] showed that unique cross-joint geometries may develop in response to a combination of remote stresses and local perturbations of the stress field in the vicinity of preexisting joints. We expand upon Dyer's analysis by providing the general solutions for cross-joint geometry as a function of remote principal stress orientations and ratios. Specific cross-joint geometries are determined by solving for the local cross-joint angle as a function of distance from the preexisting joint. On the basis of theoretical derivations, cross-joint geometries are grouped into five main categories: curving parallel, curving perpendicular, quasi-curving parallel, quasi-curving perpendicular and noncurving geometries. Furthermore, by discussing the stress state in the vicinity of the preexisting joint, a general expression for the dimension of compressive zone is derived, and a more detailed classification of cross-joint geometry is provided. Results from this study provide a method to estimate the relative magnitudes of remote principal stresses simply based on the observed cross-joint geometry, which may help constrain the tectonic history of a region. In addition, knowledge of precise cross-joint curvature and intersection geometries may provide important insights into their connectivity and fluid flow characteristics.

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Joint development in perturbed stress fields near faults

Cited by 149 publications

References 27 publications

Structural inheritance and cenozoic stress fields in the Jura fold-and-thrust belt (France)

Structural inheritance and cenozoic stress fields in the Jura fold-and-thrust belt (France)

Fracture-fault Networks and Role of Nested Topology on the Mechanical Response and Connectivity for Tight Gas Extraction

Theoretical analysis of cross‐joint geometries and their classification

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