Strike-slip ground-surface rupture (Greendale Fault) associated with the 4th September 2010 Darfield Earthquake, Canterbury, New Zealand

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Journal Article
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University of Canterbury. Geological Sciences
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Date
2011
Authors
Barrell, D.J.A.
Litchfield, N.J.
Townsend, D.B.
Quigley, M.
Van Dissen, R.J.
Cosgrove, R.
Cox, S.C.
Furlong, K.
Villamor, P.
Begg, J.G.
Abstract

This paper provides a photographic tour of the ground-surface rupture features of the Greendale Fault, formed during the 4th September 2010 Darfield Earthquake. The fault, previously unknown, produced at least 29.5 km of strike-slip surface deformation of right-lateral (dextral) sense. Deformation, spread over a zone between 30 and 300 m wide, consisted mostly of horizontal flexure with subsidiary discrete shears, the latter only prominent where overall displacement across the zone exceeded about 1.5 m. A remarkable feature of this event was its location in an intensively farmed landscape, where a multitude of straight markers, such as fences, roads and ditches, allowed precise measurements of offsets, and permitted well-defined limits to be placed on the length and widths of the surface rupture deformation.

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Barrell, D.J.A., Litchfield, N.J., Townsend, D.B., Quigley, M., Van Dissen, R.J., Cosgrove, R., Cox, S.C., Furlong, K., Villamor, P., Begg, J.G., Hemmings-Sykes, S., Jongens, R., Mackenzie, H., Noble, D., Stahl, T., Bilderback, E., Duffy, B., Henham, H., Klahn, A., Lang, E.M.W., Moody, L., Nicol, R., Pedley, K., Smith, A. (2011) Strike-slip ground-surface rupture (Greendale Fault) associated with the 4th September 2010 Darfield Earthquake, Canterbury, New Zealand. Quarterly Journal of Engineering Geology and Hydrogeology.
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