Effects of regional and local stresses on fault slip tendency in the southern Taranaki Basin, New Zealand

Massiot, Cécile; Seebeck, Hannu; Nicol, Andrew; McNamara, David D.; Lawrence, Mark; Griffin, Angela G.; Thrasher, Glenn P.; O'Brien, Grant; Viskovic, Paul

doi:10.1016/j.marpetgeo.2019.05.030

Cited by 11 publications

(8 citation statements)

References 57 publications

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“…In addition, there is uncertainty involved in measuring BO widths using resistivity image logs as these logs may not capture a full coverage of the borehole circumference, leading to incomplete imaging of BO widths (Kingdon et al., 2016; Massiot et al., 2019). Therefore identifying breakouts using such images may involve some degrees of subjectivity, which in turn can impact the estimation of S H max .…”

Section: Discussionmentioning

confidence: 99%

Shallow Tectonic Stress Magnitudes at the Hikurangi Subduction Margin, New Zealand

Behboudi,

McNamara,

Lokmer

2023

Geochem Geophys Geosyst

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Quantifying tectonic stress magnitudes is crucial in understanding crustal deformation processes, fault geomechanics, and variable plate interface slip behaviors in subduction zones. The Hikurangi Subduction Margin (HSM), New Zealand, is characterized by along‐strike variation in interface slip behavior, which may be linked to tectonic stress variations within the overriding plate. This study constrains in situ stress magnitudes of the shallow (<3 km) overriding plate of the HSM to better understand its tectonics and how they relate to larger scale subduction dynamics. Results reveal σ3: Sv ratios of 0.6–1 at depths above 650–700 m TVD and 0.92–1 below this depth interval along the entire HSM. Additionally, for depths below 650–700 m TVD, SHmax: Sv ratios of 0.95–1.81 in the central HSM and 0.95–2.3 in the southern HSM are estimated. These stress ratios suggest a prevalent thrust to strike‐slip (σ1 = SHmax) faulting regime across the central and southern HSM. In the central HSM, the presence of NNE‐NE striking reverse faults co‐existing with a modern σ1 (SHmax) aligned ENE‐WSW suggests that overtime the stress state here evolved from a contractional to a strike‐slip state, where the compressional direction changes from perpendicular (NW‐SE) to oblique (ENE‐WSW) to the Hikurangi margin. This temporal change in stress state may be explained by forearc rotation, likely combined with the development of upper plate overpressures. In the southern HSM, the modern WNW‐ESE/NW‐SE σ1 (SHmax) and pre‐existing NNE‐NE striking reverse faults indicate that stress state remains contractional and perpendicular (NW‐SE) to the Hikurangi margin overtime.

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Section: Discussionmentioning

confidence: 99%

Shallow Tectonic Stress Magnitudes at the Hikurangi Subduction Margin, New Zealand

Behboudi,

McNamara,

Lokmer

2023

Geochem Geophys Geosyst

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“…Thus, the number of significant observations of rotations is rather small and for some projects no rotation at the fault can be observed (Brodsky et al, 2017). Massiot et al (2019) observe significant rotations of the S Hmax orientation in the Taranaki Basin offshore New Zealand.…”

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confidence: 98%

“…Most prominently a 30 • rotation is observed at the intersection of the borehole Whio-1 with the almost vertically dipping Whio-1-fault. In this setting the orientation of S Hmax is approximately parallel to the strike of aforementioned fault (Massiot et al, 2019;Rajabi et al, 2016c). The prevailing stress state is classified as close to transtensional (S Hmax ≥ S v > S hmin ) with all three stress components inferred.…”

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confidence: 99%

“…Nevertheless, on a meter scale in boreholes abrupt or gradual rotations of the S Hmax orientation have been observed (Barton and Zoback, 1994;Brudy et al, 1997;Massiot et al, 2019;Sahara et al, 2014;Shamir and Zoback, 1992;Wang et al, 2023).…”

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confidence: 99%

“…Rotations of the S Hmax orientation associated with changes in rock stiffness are mainly observed in boreholes, e.g. by rotating borehole breakouts or drilling induced tensile fractures (Brudy et al, 1997;Cui et al, 2014;Haimson et al, 2010;Hickman and Zoback, 2004;Lin et al, 2007;Massiot et al, 2019). Some notable examples are shown in Table 3.…”

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The effect of stiffness contrasts at faults on stress orientation

Ziegler,

Seithel,

Niederhuber

et al. 2024

Preprint

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Abstract. Even though the crustal stress state is primarily driven by gravitational volume forces and plate tectonics, interpretations of borehole breakout observations show occasionally abrupt rotations of horizontal stress orientation of up to 90° when faults are crossed. This indicates the influence of faults on the local stress state, which parameter control the degree of rotation. Herein, we investigate the phenomenon of principal stress rotation at a fault by means of a 2D generic numerical model. We parametrised the fault as a rock stiffness contrast and investigate systematically the full model parameter space in terms of the ratio of the applied principal stresses, the rock stiffness contrast, as well as the angle between fault strike and orientation of the principal stress axis. General findings are that the stress rotation is negatively correlated with the ratio of principal stresses. A small angle between the far field stress orientation and the fault facilitates stress rotation. A high contrast in rock stiffness further increases the stress rotation angle. Faults striking perpendicular to the maximum principal stress orientation experience no rotation at all. However, faults oriented parallel to the maximum principal stress orientation experience either no rotation or a 90° rotation, dependent on the ratio of principal stresses and the rock stiffness contrast. A comparison with observations from various boreholes worldwide shows that in general, the findings are well in agreement, even though the dip angle proves to have an influence on the stress rotation, in particular for shallow dipping faults.

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Numerical investigation of the stress regime effect on injection-induced fault reactivation and associated seismicity

Yan,

Yu,

Jing

2024

Computers and Geotechnics

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Effects of regional and local stresses on fault slip tendency in the southern Taranaki Basin, New Zealand

Cited by 11 publications

References 57 publications

Shallow Tectonic Stress Magnitudes at the Hikurangi Subduction Margin, New Zealand

Shallow Tectonic Stress Magnitudes at the Hikurangi Subduction Margin, New Zealand

The effect of stiffness contrasts at faults on stress orientation

Numerical investigation of the stress regime effect on injection-induced fault reactivation and associated seismicity

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