The damage zone of New Zealand

Author:

Williams, Jack Nicholas (Jack)

Year:

Project type:

Abstract:

The dynamic propagation of an earthquake rupture will generate inelastic deformation within its surrounding medium, culminating in the development of a fault damage zone. These are heavily fractured volumes of rock that flank the fault core, where the majority of displacement has been accommodated. Using the example of the Alpine Fault, I assess the mechanical and chemical processes associated with fault damage, which strongly condition the short and long term evolution of a fault.

Approximately 70% of the oblique-dextral motion between the Australian and Pacific plates on the South Island of New Zealand is localised onto the Alpine Fault. A continuous record of its damage zone extending <30 m above its principal slip zones (PSZs) is provided by core recovered during the first phase of the Deep Fault Drilling Project (DFDP-1). A combination of visual core descriptions, X-ray and neutron tomographic core scanning, and X-ray diffraction demonstrate that the damage zone is epitomised by gouge-filled

Named Localities:

Thesis description:

255 Pages A4

Department:

OU geology Identifier:

2017Williams

Author last name:

OURArchive access level:

Open Access

Location (WKT, WGS84):

MULTIPOLYGON (((169.798292031391 -43.5293028095617,170.341206105389 -43.2440135055566,170.43216699032 -43.3127983353413,169.865109514897 -43.6045274335989,169.798292031391 -43.5293028095617)))

Abstract PDF File

http://download.otagogeology.org.nz/temp/Abstracts/2017Williams.pdf

Collection

Citation

Williams, Jack Nicholas (Jack), “The damage zone of New Zealand,” Otago Geology Theses, accessed November 21, 2017, http://theses.otagogeology.org.nz/items/show/659.