https://theses.otagogeology.org.nz/files/original/8c0f4b955548236ab5df9924e39f844b.pdf 5b80211f877abfc9e0a44e1e27b31808 Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Geology theses OU Geology thesis Thesis or dissertation completed by University of Otago Geology students Location WKT (WGS84) The location stored in WKT (WGS84) format POLYGON ((170.172210263390298 -44.560617163716671,170.201671342808538 -44.561105176890734,170.20010998088361 -44.583218533755392,170.170827301195686 -44.582258153757493,170.172210263390298 -44.560617163716671)) Author last name Last name of the Author Webster Project type Is it an MSc, PhD, BSc(Hons) or PGDipSci? MSc Advisers Who supervised/advised this student Toy, V.G. Abstract The Abstract for this thesis The microstructural deformation processes that occur during earthquakes and how these are represented in the fault rocks are not well understood. As cataclastic fault rock is formed, there is an evolution of particle size distribution and formation of different particle shapes. Three faults were investigated in the Loch Laird Recreational Reserve, Benmore, Waitaki, which have accommodated varying amounts of slip (0.64 - 6.8m). Using high-resolution imaging capabilities on a Scanning Electron Microscope, we produced particle maps that distinguish grains according to their size and shape. These maps were constructed for the main cataclasite components: quartz and feldspar. Particle size distribution (PSD) data indicate that there is no relationship between fractal dimension (D) and amount of slip on the fault plane. The fractal dimension is consistent across all faults regardless of total slip. Therefore, it is proposed that the fractal dimension within cataclasite is established at displacements smaller than those accommodated by these faults. Particle size analysis show that, as particle size decreases, angularity decreases but circularity and convexity increase. From this study alone, it is not possible to infer what effect this change in particle shape has on the frictional strength of the fault. Observations from thin sections and consistency of PSD with theoretical predictions indicate that constrained comminution is the deformation mechanism that initially reduces particle size. Abrasion is thought to be the dominant particle size reduction for relatively smaller particles, inferred by examination of the circularity and convexity shape data. OURArchive handle The handle from the Otago University Research Archive (OURArchive) <a href="http://hdl.handle.net/10523/5898">http://hdl.handle.net/10523/5898</a> OURArchvive access level Abstract Only Department The department where the student is studying primarily. Geology Named locality Named locality describing the field area location. Loch Laird Recreational Reserve Benmore Thesis description Number of pages, maps, CDs, etc. xviii, 159 pages A4 Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Identifier An unambiguous reference to the resource within a given context 2015Webster Creator An entity primarily responsible for making the resource Webster, Christopher (Chris) Date A point or period of time associated with an event in the lifecycle of the resource 2015 Title A name given to the resource Cataclastic Processes in Small Scale Faults at Loch Laird Recreational Reserve, Benmore, New Zealand Subject The topic of the resource Structural Geology Brittle Deformation Cataclasite faulting Fractal Dimension Micro-structural Deformation New Zealand Particle Size Distribution