Articles | Volume 9, issue 2
Research article
23 Apr 2018
Research article |  | 23 Apr 2018

Controls on fault zone structure and brittle fracturing in the foliated hanging wall of the Alpine Fault

Jack N. Williams, Virginia G. Toy, Cécile Massiot, David D. McNamara, Steven A. F. Smith, and Steven Mills

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Cited articles

Adam, L., Toy, V., and Boulton, C.: Mylonites as shales? Experimental observations of P-wave anisotropy dependence on mineralogy, layering and scale, in: SEG Technical Program Expanded Abstracts 2016, 3169–3173, Society of Exploration Geophysicists, 2016.
Allen, M. J., Tatham, D., Faulkner, D. R., Mariani, E., and Boulton, C.: Permeability and seismic velocity and their anisotropy across the Alpine Fault, New Zealand: An insight from laboratory measurements on core from the Deep Fault Drilling Project phase 1 (DFDP-1), J. Geophys.-Res.-Sol. Ea., 122, 6160–6179,, 2017.
Ampuero, J. P. and Mao, X.: Upper limit on damage zone thickness controlled by seismogenic depth, Fault Zo. Dyn. Process. Evol. Fault Prop. Dur. Seism. Rupture, 227, 243–253, 2017.
Andrews, D. J.: Rupture dynamics with energy loss outside the slip zone, J. Geophys.-Res.-Sol. Ea., 110, 1–14,, 2005.
Barth, N. C., Toy, V. G., Langridge, R. M., and Norris, R. J.: Scale dependence of oblique plate-boundary partitioning: New insights from LiDAR, central Alpine fault, New Zealand, Lithosphere, 4, 435–448,, 2012.
Short summary
We present new data on the orientation of fractures, their fill, and their density around the Alpine Fault, a plate boundary fault on the South Island of New Zealand. Fractures < 160 m of the fault are filled and show a range of orientations, whilst fractures at greater distances (< 500 m) are open and parallel to the rock's mechanical weakness. We interpret the latter fracture set to reflect near-surface processes, whilst the latter are potentially linked to deep-seated Alpine Fault seismicity.