Articles | Volume 9, issue 2
Solid Earth, 9, 469–489, 2018
https://doi.org/10.5194/se-9-469-2018
Solid Earth, 9, 469–489, 2018
https://doi.org/10.5194/se-9-469-2018
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 et al.

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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, https://doi.org/10.1002/2017JB014355, 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, https://doi.org/10.1029/2004JB003191, 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, https://doi.org/10.1130/L201.1, 2012.
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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.