2 10 30 https://theses.otagogeology.org.nz/files/original/0e1e1ec820e7c21d4d2237f0ba755567.pdf fd30b88dc04796a94fc4d23f448292cf 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 MULTIPOLYGON (((161.383436482000207 -77.919436589999975,161.320118892000153 -77.919158685999918,161.205761425000105 -77.909889900999985,161.13808984500011 -77.895507576999961,161.308470835000122 -77.876751113999958,161.466131949000157 -77.887138447999988,161.461067169000131 -77.906220681999955,161.383436482000207 -77.919436589999975)),((161.329310575000051 -77.784787809999941,161.361412126000147 -77.801952201999953,161.270173059000058 -77.79695523099997,161.186313240000146 -77.782911683999941,161.132174511000073 -77.757237762999964,161.160584150000119 -77.745171394999943,161.175481151000071 -77.733654421999972,161.279905478000018 -77.727844431999983,161.358386059999987 -77.725859692999961,161.461055461000143 -77.718721732999924,161.528683806000146 -77.725822257999923,161.56037269000015 -77.743303821,161.549591209000056 -77.760440374999973,161.480573242000162 -77.768882044999955,161.443320301000085 -77.774237619999951,161.375383157000101 -77.772827494999945,161.348964045000116 -77.772464921999983,161.329310575000051 -77.784787809999941)),((159.898428696000082 -76.693281530999968,159.826828304000117 -76.710282864999954,159.752241341000087 -76.733176196999977,159.674044544000054 -76.747047413999951,159.611263523000048 -76.749911027999985,159.553755766000108 -76.77014556499995,159.421239433000125 -76.783956376999953,159.44608696700007 -76.749629385999981,159.540353497000069 -76.719223942999989,159.51115247600012 -76.706966754999939,159.542038242000189 -76.682423834999938,159.573764958000112 -76.655908552999932,159.582180879000077 -76.621753265999956,159.61456277500011 -76.607105750999963,159.647219270000051 -76.630935097999981,159.648918787000127 -76.646461926999962,159.609773972000113 -76.670797142999959,159.615069132000059 -76.684072296999943,159.688270196000047 -76.69391421499995,159.722031394000055 -76.683975691999933,159.789917102000175 -76.665153827999958,159.777566368000095 -76.649247919999922,159.794598991000015 -76.630207698999982,159.818457498000129 -76.613800911999988,159.862755748000041 -76.616542897999977,159.91155142100007 -76.63603461699995,159.901593775000038 -76.657714862999967,159.926228124000176 -76.671565966999921,159.898428696000082 -76.693281530999968))) Author last name Last name of the Author Airoldi Project type Is it an MSc, PhD, BSc(Hons) or PGDipSci? PhD Advisers Who supervised/advised this student White, J.D.L. Cooper, Alan Zanella, E. Abstract The Abstract for this thesis Solidified remnants of major magma pathways, and localized clusters of smaller intrusive sheets, are exposed in the mountains of South Victoria Land, Antarctica. Together the intrusions represent the shallowest 2 km of the plumbing system for the Early Jurassic Ferrar Large Igneous Province. Three sites were investigated: Allan Hills exposes the shallowest portion (<1 km) of the Ferrar plumbing system, whereas Terra Cotta Mountain and Solitary Rocks represent a paleodepth of ≥2 km. Ferrar Dolerite sills were emplaced into a highly stratified and vertically anisotropic sedimentary sequence. They evolved as interconnections of shallowly dipping Ferrar Dolerite sheets and sills, or ‘transgressive intrusions’. These intrusions represent the preferred mode of propagation of magma in the Ferrar LIP and are observed even at shallow depths. The largest sills, such as the Basement Sill exposed at Solitary Rocks, represent major magma pathways that were continuously injected during the Ferrar magmatism, and which transported magma for long distances through rock now exposed in the Transantarctic Mountains. At Terra Cotta Mountain, and several other locations in South Victoria Land, clusters of igneous sheets formed thanks to high localized tensile and shear stresses between intrusions propagated along adjacent stratigraphic levels (bedding planes). Within 1 km of the surface (Allan Hills), sills propagated very close to, or even intersected, the surface. The injection of magma into fractures formed in a roof of country rock, which was buoyed up above such shallow-seated sills, resulted in clusters of segmented intrusions, with both irregular and transgressive geometries, and complex mutual relationships. There are no significant petrological differences among intrusions exposed in these different parts of the Ferrar system. Magma flow paths inferred from rock magnetic fabrics indicate a strong connection between magmatic flow directions and complex intrusion geometries, and the general heterogeneity of both is inferred to indicate that magma created its own set of fractures both across the Beacon sedimentary rocks. The model developed for the Ferrar plumbing system on the basis of the above observations and inferences is, at least between 0 and 2 km depth below the Jurassic paleosurface, propagation of sills and connecting sheets of the Jurassic Ferrar LIP was essentially selfdriven, with little or no control from significant stresses acting on the lengthscale of the sill network. The principal structural controls on magma emplacement were provided by structural anisotropies within the Beacon sedimentary sequence. Finally, during evolution of the province the lowest sill intrusions became thickened at depth as the result of repeated injections of magma; this phenomenon favoured the lateral propagation of magma for long distances across the Ferrar LIP. OURArchive handle The handle from the Otago University Research Archive (OURArchive) <a href="http://hdl.handle.net/10523/616">http://hdl.handle.net/10523/616</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. Ferrar LIP South Victoria Land Antarctica Thesis description Number of pages, maps, CDs, etc. viii, 177 leaves : ill. (chiefly col.), col. maps ; 30 cm + 1 CD-ROM (4 3/4 in.) 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 2011Airoldi Creator An entity primarily responsible for making the resource Airoldi, Giulia Maria. Date A point or period of time associated with an event in the lifecycle of the resource 2011 Title A name given to the resource Magma injection dynamics in the shallow Ferrar LIP (South Victoria Land, Antarctica) Subject The topic of the resource Volcanology Igenous Petrology Antarctica Ferrar Large Igneous Province Rock magnetism https://theses.otagogeology.org.nz/files/original/1a2d3525bd3159852ed98507dc74a67d.pdf f7220180309363d8514a17e144b27158 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 ((169.738090972414852 -46.240028488223061,169.731951973512139 -46.239376701380095,169.736605080254066 -46.160922857891016,169.7771581430423 -46.11206443198342,169.834443968677476 -46.068419460907364,169.927605428075537 -46.054294019344447,170.029819354121116 -46.061761265952839,170.118025922487902 -46.075928466755748,170.18882585191264 -46.096744451599562,170.241866803869982 -46.131377271353429,170.275741826883376 -46.20839444619039,170.247596232854278 -46.29106733588312,170.151753844637994 -46.350633127436744,170.027089642645137 -46.366508081138228,169.917040529035688 -46.365972779065721,169.832964974345089 -46.332715142906238,169.770413576528739 -46.285717403689979,169.738090972414852 -46.240028488223061)) Author last name Last name of the Author Lindqvist Project type Is it an MSc, PhD, BSc(Hons) or PGDipSci? PhD Advisers Who supervised/advised this student Lee, D.E. White, J.D.L. Abstract The Abstract for this thesis Late Cretaceous-Paleocene nonmarine and shallow marine sediments of Pakaha Group in Kaitangata Sub-basin, 80 km south of Dunedin, provide a useful reference for exploration of the mainly-offshore Great South Basin. Deposition occurred in adjacent passive and actively subsiding zones west and east of Castle Hill Fault. Castle Hill Fault, a southern coalescence of Titri and Tuapeka Faults, has a northerly trend within the study area and extends offshore to the southeast. East of Castle Hill Fault, a lower 500+ m thick coal-bearing interval of Taratu Formation is overlain by a ~ 180 m thick interfingering assemblage of Latest Cretaceous-Paleocene paralic sediments; informally referred to as 'Golf Club succession' (GCs). GCs comprises a series of eastward-prograding, tide-influenced sandy pebble conglomerate units (included in upper Taratu Formation) and westward-onlapping transgressive sandstone bodies (included in Golf Club Member ofWangaloa Formation). Shoreface sandstones are locally cemented with calcite, dolomite, magnesian siderite, framboidal pyrite, and alkali feldspar. Clear authigenic overgrowths on detrital potassium feldspar grains are found throughout Wangaloa Formation. Evidence of syndepositional sulphide diagenesis related to meteoric groundwater seepage in the shoreface zone (massive pyrite cement, chimney structures, and pyrite-cemented walls of Rhizocorallium trace fossils) is present in one transgressive sand body. Tidal influence during deposition of granule and pebble conglomerate units interbedded with shoreface sands is indicated by abundant examples of paired mud drapes, tidal bundles, and Teredolites in transported wood. Mud-draped straight-crested conglomerate megaripples of ~ 1 m wavelength preserved in the upper part of GCs exposed near W angaloa Domain provide evidence of increasing activity of ocean swell waves approaching from the east. Overlying GCs, the upper 45 m of Wangaloa Formation assigned to Mitchells Rocks Member (MRM), consists of fine-grained sandstone and shell beds composed mainly of turritelline gastropods. Hummocky and swaley cross-stratification, megaripple bed-forms, and abundant Ophiomorpha burrows in MRM are consistent with deposition in a storm-influenced shoreface setting. Early Paleocene shoreline transgression and deposition of MRM across Castle Hill Fault zone in the Benhar area reflects a cessation in growth faulting, reduction in local coarse-grained sediment supply, and relative sea level rise. Anomalously high gamma radiation emitted by MRM is associated with monazite-bearing heavy mineral concentrations composed mainly of degraded ilmenite (pseudorutile) and zircon sand. Heavy minerals are interpreted to have been concentrated in the foreshore and Department The department where the student is studying primarily. Geology Named locality Named locality describing the field area location. Kaitangata Thesis description Number of pages, maps, CDs, etc. viii, 277 leaves : ill. (some col.) ; 30 cm. 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 2009Lindqvist Creator An entity primarily responsible for making the resource Lindqvist, Jon K. Date A point or period of time associated with an event in the lifecycle of the resource 2010 Title A name given to the resource Sedimentology of pakaha group, late Cretaceous-Paleocene, Kaitangata sub-basin, great south basin, New Zealand Subject The topic of the resource Sedimentology Coal facies analysis Pakaha group Great South Basin. Kaitangata https://theses.otagogeology.org.nz/files/original/8a16ab04ccdeccf48feed1874cf0cbcd.pdf dd468a74dc4b461dfe2ecefd93bcab76 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 Author last name Last name of the Author Lewis Project type Is it an MSc, PhD, BSc(Hons) or PGDipSci? MSc Advisers Who supervised/advised this student White, J.D.L. Abstract The Abstract for this thesis The Potaka Tephra was deposited in a range of conditions across the Wanganui Basin including: nearshore/delta front, restricted-sediment-input, nearshore marine environment, and mid-basin with highly variable sediment supply (paleobathymetry and lcaol current fluctuation controlled). Evidence exists for two stages of volcaniclastic sedimentation at Kai Iwi, the result of a delayed (relative to other localities) major influx of material to the site. A rapid influx of sediments is suggested by componentry, sedimentary structures, thickness, and a prograding delta environment. The main controls on this process is sediment supply. The Potaka Tephra is a good example of post volcanism sedimentary response in a distal basinal environment. The chemistry of the Potaka Tephra pumice-glass and ash shards ranges from ~72-78% SiO2. Minor variations in other elements occur non-systemically across all localities. Wholepumice compositions range from dacite to high SiO2 rhyolite. All pumice are peraluminous, and range from medium-high K2O. Phenocrysts make up 6-7.5% of the solid material in Potaka Tephra pumice. Phenocrysts identified are: plagioclase (73%), hornblende (8%), OPX (7%), iron oxides (5%), quartz (3%), biotite (3%), CPX (<0.5%), +/- accessory minerals apatite and zircon. Free crystals in the Potaka Tephra make up approximately 5-85% of the tephra depending on locality. The free crystal assemblage consists of: plagioclase feldspar, hornblende, OPX, CPX, quartz, biotite, muscovite, iron oxides, ± alkali feldspar, apatite, and zircons. The proportion of free crystals present in any one sample is highly varied. All glass and whole-pumice major and trace element compositions show minor compositional variations consistent with fractionation of the observed mineral assemblage ± monazite, allanite, and xenotime. Overall they look similar, and are suggestive of a single population. The Potaka Tephra trace element composition is nearly identical to that of the Kidnappers Ignimbrite and Fall Deposits. For the first time, a definitive correlation of the Potaka Tephra with the Kidnappers Fall and Ignimbrite Deposits can be made. Magma evolution in the Potaka tephra was dominated by plagioclase fractionation. No definitive evidence of magma mixing was seen. Trace element ratios suggest that the Potaka Tephra was sourced from two separate batches of magma (melt + crystals). Each batch of magma evolved by fractionation of plagioclase and zircon, but to different degrees. To produce chemical signatures like these, the magma batches would have to have been isolated from each other, either by chemical zoning or physical isolation. Department The department where the student is studying primarily. Geology Named locality Named locality describing the field area location. Whanganui Thesis description Number of pages, maps, CDs, etc. xviii, 304, [110] p. : col. ill., maps ; 30 cm. + 1 CD-ROM. 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 2007Lewis Creator An entity primarily responsible for making the resource Lewis, Bridgette. Date A point or period of time associated with an event in the lifecycle of the resource 2007 Title A name given to the resource Eruptive source and depositional characteristics of the Potaka Tephra, Wanganui Basin, New Zealand Subject The topic of the resource Sedimentology Petrology depostition sedimentation volcanic ash Whanganui River Watershed https://theses.otagogeology.org.nz/files/original/183f25ae6244f06dbfede7aa7a750a2f.pdf 52be272c141708915360c98fa89efcb7 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 Author last name Last name of the Author Gue?gan Project type Is it an MSc, PhD, BSc(Hons) or PGDipSci? MSc Advisers Who supervised/advised this student White, J.D.L. Abstract The Abstract for this thesis The Middle Jurassic Kirkpatrick flood basalts and comagmatic Ferrar intrusions exposed in the Transantarctic Mountains represent a major pulse of tholeiitic magmatism, and together constitute the Ferrar Large Igneous Province of Antarctica. At Coombs Hills, the exposed Ferrar intrusions consist of numerous dykes and sills representing a complex plumbing system. This work examines the mode of dyke propagation and magma flow within different dykes present within, and on the edge of, a vent complex, enriching our understanding of magma transport and shallow intrusion conditions within Large Igneous Provinces generally. A tentative scaling relationship analysis has been applied to the dyke population of Coombs Hills from study of aerial photographs. This preliminary study shows a heterogeneous distribution of dykes, both spatially and in terms of orientation, within the area. The length-frequency distribution of dykes follows a power-law distribution, but the physical significance of these observations is not yet known. Field mapping, plus detailed observation and description of dykes' geometry in the field produced one of the main datasets of this study. Dykes exposed at Coombs Hills are highly segmented. The mechanisms inferred for segmentation suggests either a system of preexisting segmented country-rock fractures in some areas, or variations in the orientation or intensity of the principal stresses along the propagation paths. En-echelon arrays of dyke segments are considered to have formed by breakdown of a parent crack in response to spatial or temporal rotations of the remote principal stresses, and mostly show a sense of dextral offset in the field. Bridging structures and en-echelon dykes array reflect a predominantly vertical flow within the area. There are differences in the inferred flow patterns and dyke geometry between the dykes that intrude the well r) . layered but isotropic Beacon sandstone versus dykes intruding the poorly stratified ---------~ Mawson lapilli tuff. These differences may reflect a meandering flow in the poorly stratified Mawson compared to a more straightforward one within the sandstone, and may reflect the poor consolidation inferred for the recently deposited Mawson at the ---~-----~ time of dyke intrusion. The structural analysis reveals two distinct sets of dyke trends, subperpendicular to each other. The country rock fractures in the area present the same geomorphologic aspect as the dykes' walls and their orientations follow similar subperpendicular trends as those identified for the dykes. The fractures are found in prolongation of dykes and are here interpreted to have formed during an early stage of dyke propagation and in the absence of significant stresses other than the magmatically induced ones. The characteristic sub-perpendicular dyke and fracture trends observed suggest that the "background" stress field was an effectively triaxial stress field with strains and fractures generated only by vertical movement and pressure on the host rock. Anisotropy of Magnetic Susceptibility (AMS) analyses have been done on 80 samples collected from the field area. This analysis reveals the importance, when investigating the flow direction within volcanic rocks of considering and removing the magnetic remanent component from the bulk magnetic susceptibility measured on the sample. Unfortunately the degree of anisotropy measured for most samples was consistently very low and did not allow determination of extensive and characteristic flow directions within dykes and within the whole area. The AMS analysis, however, still suggest a sub-horizontal flow direction within the massive basaltic cliff of the area, suggesting it to be a major (more than 300 m wide) sill; this is interesting, because the inner, western contact of the sill with the vent complex is subvertical. The petrographical and geochemical observations indicate that the intrusions are basaltic andesite in terms of T AS classification, with little variation among samples. The geochemical results suggest the dykes intruded the Beacon sandstone first, before minor fractional crystallisation reduced the compatible element abundance in the magma that was subsequently emplaced as the massive sill (basaltic cliff) intrusion. The model of emplacement proposed for Coombs Hills intrusion is comparable to the observed system exposed at Mt Grant where both vertical and horizontal intrusive sheets, as well as inclined ones, are linked together as record of a complex magma distribution system. Department The department where the student is studying primarily. Geology Named locality Named locality describing the field area location. Coombs Hill Antarctica Thesis description Number of pages, maps, CDs, etc. v, 188 page + appendices; A4, 1 map (~A2), CD 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 2006Guegan Creator An entity primarily responsible for making the resource Emilie B. M. Guégan (Emilie Benedicte Montaine), 1983- Date A point or period of time associated with an event in the lifecycle of the resource 2006 Title A name given to the resource Shallow intrusion conditions in a flood-basalt province : the story from dykes and a sill offshoot along the contact between a vent complex and country rock : Coombs Hills, Ferrar Province, Antarctica Subject The topic of the resource Volcanology Map Dykes Ferrar intrusions Flood Basalt Intrusion https://theses.otagogeology.org.nz/files/original/5cdef2a18a78a815909b21559350d648.pdf 0ece8aebb4746f656112004b2061ad66 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 Author last name Last name of the Author Garland Project type Is it an MSc, PhD, BSc(Hons) or PGDipSci? BSc(Hons) Advisers Who supervised/advised this student White, J.D.L. Abstract The Abstract for this thesis Facies analysis indicates a deep marine depositional environment that sourced sediment loads from the shelf margins. Shelf margins are interpreted to have been narrow margins which were vulnerable to destabilisation at the shelf break when sediment exceeded accommodation space on the shelf. Destabilisation of the shelf break is interpreted to have generated turbidite flows that were deposited in the deep marine depositional environment. Department The department where the student is studying primarily. Geology Named locality Named locality describing the field area location. Coombs Hills Antarctica Ferrar Glacier Region Antarctica Thesis description Number of pages, maps, CDs, etc. iv, 147, [16] leaves : ill., maps, 30 cm. + 1 CD-ROM 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 2006Garland Creator An entity primarily responsible for making the resource Garland, Marama Jean. Date A point or period of time associated with an event in the lifecycle of the resource 2006 Title A name given to the resource Intrusive processes in the Ferrar Province and their role in the evolution of the geology of Coombs Hills, Antarctica Subject The topic of the resource Structural geology intrusives https://theses.otagogeology.org.nz/files/original/3c8b1d28946161397d3694de936585a0.pdf f2f5c2187167980e1d10bcb98f49339f 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 ((173.697497887098592 -38.884149356665198,174.703744201329101 -38.867842164422783,174.659819117622419 -39.917391551453917,173.723383880626216 -39.921056674676514,173.689699186062086 -38.866313626657806,173.697497887098592 -38.884149356665198)) Author last name Last name of the Author Finnis Project type Is it an MSc, PhD, BSc(Hons) or PGDipSci? PhD Advisers Who supervised/advised this student White, J.D.L. Johnston, D. Abstract The Abstract for this thesis The aim of this thesis is to examine the resilience and vulnerability of Taranaki communities to volcanic hazards, and to propose a strategy to ensure the safety and longevity of Taranaki residents in the event of an eruption. Mt Taranaki is a dormant volcano that is surrounded by a ring plain populated by over 100,000 people. The volcano has had an average eruptive cycle of 330 years, with the last eruption dated at ~1755 AD. Hazards include ash fall, lahars, debris avalanches and pyroclastic density currents. Inglewood, Stratford and Opunake are the largest population centres located in moderate to high hazard zones, and for this reason were chosen as the study communities. Resilience is defined as the capacity to respond to a hazard event by physically and psychologically recovering, adapting to, or changing to similar or better conditions than those experienced before the event. Vulnerability is defined to be people's incapacity to cope with a hazardous event as a result of their personal characteristics. A person's vulnerability and resilience is influenced by demographic variables, socio-cognitive variables and preparedness. Inglewood, Stratford and Opunake adults have good self-efficacy and action-coping use, fair risk perceptions, outcome expectancy and response efficacy, but poor understanding of event timing relative to eruption probability, critical awareness, preparedness and information-seeking intentions and preparedness levels. Preparedness is found to be influenced by residents' intentions to prepare, which in turn are influenced by critical awareness, action-coping and outcome expectancy. Taranaki students have a fair awareness of hazard and knowledge of correct response behaviours to various hazards. Preparedness, in terms of preparedness measures undertaken, emergency plans made and emergency practices in place, is low. Students who have participated in hazard-education programmes have a better knowledge of response behaviours, lower levels of hazard-related fear, and reported higher level of preparedness. Spatial analyses, carried out to determine the geographic distribution of at-risk groups within the study communities, showed that the areas most at-risk tend to be those with the highest population densities. The spatial analysis was not as beneficial as expected, due to small data sets, but did provide some results to be considered as a basis for further research. Effective public education can be achieved when delivered to a set of guidelines, such as providing information regularly through multiple media and sources, ensuring consistent messages, targeting information to at-risk groups and monitoring programme effectiveness. Community capacity building projects decrease aspects of vulnerability and build resilience by working at a local scale and targeting at-risk groups. Psychological preparedness education helps citizens to mentally prepare for an event and should be a component of all projects. The proposed strategy calls for (a) forming partnerships with relevant stakeholders to assist with public education, research, and funding, (b) further research into the characteristics of Taranaki communities and effective public education campaigns, (c) the development and implementation of a public education schedule and projects that build community capacity, and d) long-term planning, periodic revision of programmes and consistent public engagement. OURArchive handle The handle from the Otago University Research Archive (OURArchive) <a href="http://hdl.handle.net/10523/144">http://hdl.handle.net/10523/144</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. Mt Taranaki Mt Egmont Thesis description Number of pages, maps, CDs, etc. xvii, 445 leaves : ill., maps ; 30 cm. 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 2006Finnis Creator An entity primarily responsible for making the resource Finnis, Kirsten Kay, 1978- Date A point or period of time associated with an event in the lifecycle of the resource 2006 Title A name given to the resource Resilience and vulnerability in communities around Mt Taranaki Subject The topic of the resource Volcanology analysis environment hazard Mount Egmont New Zealand resilience Taranaki volcanic volcanic hazards https://theses.otagogeology.org.nz/files/original/88d22aead830fb492b5d58c32571d794.pdf 3485554f000f218ae65b5295b48b480c 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 Author last name Last name of the Author Ross Project type Is it an MSc, PhD, BSc(Hons) or PGDipSci? PhD Advisers Who supervised/advised this student White, J.D.L. Abstract The Abstract for this thesis The Jurassic Ferrar large igneous province of Antarctica contains significant mafic volcaniclastic deposits, underlying the Kirkpatrick flood basalts. In South Victoria Land, the mafic volcaniclastics are referred to as the Mawson Formation. At Coombs Hills, the Mawson is interpreted as filling a large vent complex, which was re-examined in detail to better understand vent-forming processes. Two contrasting types of cross-cutting volcaniclastic bodies were found in the complex, both of which are interpreted to have been forcefully emplaced from below into existing, non-consolidated debris. The first type consists of country rock-rich lapilli-tuff pipes. These are interpreted as fossilized remnants of subterranean debris jets which originated when phreatomagmatic explosions occurred near the walls or floor of the vent complex, causing fragmentation of both magma and country rock. The second type of cross-cutting body consists of basalt-rich tuff-breccias and lapilli-tuffs, some of which could have been generated by explosions taking place within pre-existing basalt-bearing debris, well away from the vent walls. Other basalt-rich zones, accompanied by domains of in situ peperite and coherent basalt, are inferred to have originated by less violent processes. At nearby Allan Hills, the Mawson can be divided into two informal members, m1 and m2. Member m1 is exposed only at central Allan Hills, consists essentially of sedimentary material from the underlying Beacon Supergroup, and is interpreted as a ::::;180 m-thick debris avalanche deposit. Most megablocks in m1 were derived from the late Triassic Lashly Formation, parts of which were probably only weakly consolidated in the Jurassic. Sandstone breccias dominate volumetrically over megablocks within the deposits. This indicates pervasive and relatively uniform fragmentation of the moving mass, and probably reflects the weak and relatively homogeneous nature of the material involved. The avalanche flowed into a pre-existing topographic depression carved into the Beacon sequence, and flow indicators reveal a northeastward movement. Sparse globular basaltic megablocks suggest that Ferrar intrusions played a role in triggering the avalanche. Member m2, which is exposed at both central and southern Allan Hills, consists predominantly of metre-thick basaltic volcaniclastic layers that fall into three broad categories: (1) poorly sorted, coarse lapilli-tuff and tuff-breccia; (2) block-rich layers; (3) tuff and fine lapilli-tuff. The former type is interpreted as the deposits of high-concentration pyroclastic density currents (PDCs), probably formed during the collapse of phreatomagmatic eruption plumes. Occasional block-rich layers probably were formed by both ballistic fall from local vents and pyroclastic flows, and the finer-grained layers were probably deposited by dilute PDCs. Dilute, moist turbulent currents were also likely responsible for the generation and deposition of large (::::;4.5 cm) rim-type accretionary lapilli. The thick layers are locally underlain by or interbedded with thin tuff ring-style volcaniclastic layers, and all the layers are underlain and invaded by basalt-rich tuff-breccias and lapilli-tuffs. Department The department where the student is studying primarily. Geology Named locality Named locality describing the field area location. Coombs Antarctica Allan Hills Antarctica Victoria Land south Thesis description Number of pages, maps, CDs, etc. 1 v. (various pagings) : ill., maps ; 30 cm. 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 2005Ross Creator An entity primarily responsible for making the resource Ross, Pierre-Simon. Date A point or period of time associated with an event in the lifecycle of the resource 2005 Title A name given to the resource Volcanology of the Mawson Formation at Coombs and Allan Hills, South Victoria Land, Antarctica Subject The topic of the resource Volcanology lapilli - tuffs mafic volcaniclastics Mawson Formation vent-forming processes https://theses.otagogeology.org.nz/files/original/3bae35718e77cbe8068051a015e58800.pdf c498e241d59cc291cb22da92d14113f1 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 Author last name Last name of the Author Hardy Project type Is it an MSc, PhD, BSc(Hons) or PGDipSci? BSc(Hons) Advisers Who supervised/advised this student White, J.D.L. Abstract The Abstract for this thesis Lake Okaro was formed approximately 700 years ago, simultaneous with a late stage of the Kaharoa eruptive phase at Tarawera, in a phreatic eruption that induced a number of secondary hydrothermal eruptions. The phreatic eruption was initiated within or beneath the welded Rangitaiki Ignimbrite and involved the excavation of a crater at least 80-metres deep at the south end of the present lake, with the resulting ejecta creating a ‘cap’ over an area of previous hydrothermal activity now occupied by the north end of the lake. I infer that increases in pressure as a result of the hydrothermal system being buried by material from the phreatic eruption led to a number of shallowly focused (<60 metres depth) hydrothermal eruptions, which helped fill the phreatic eruption crater, making the lake its present shape. Slumping into the craters, in addition to redeposition of Kaharoa tephra and AD1886 Rotomahana Mud from the surrounding hills, filled the lake to its present observed depth, with deep points indicating the position of original craters. Erosion rills scarring hillsides to the north of Lake Okaro occur entirely within the Rotomahana Mud and represent part of the immediate sedimentary response to the AD1886 eruption. Increased sediment flow from erosion of the Rotomahana Mud over a low-permeability soil horizon developed in the Okaro Deposit initially caused degradation of valley floors, but once the rills stabilised and the sediment flow decreased, aggradation rates of approximately 0.013 metres/year occurred raising the valley floors 0.10 metres higher than their pre-eruption level by 1917, when the Frying Pan Flat hydrothermal eruption at Waimangu deposited a layer of material over the area. Department The department where the student is studying primarily. Geology Named locality Named locality describing the field area location. Rotomahana Lake Okaro Thesis description Number of pages, maps, CDs, etc. 66 leaves : ill., maps ; 30 cm. + 1 CD-ROM (4 3/4 in.) 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 2005Hardy Creator An entity primarily responsible for making the resource Hardy, Lyndon Winter. Date A point or period of time associated with an event in the lifecycle of the resource 2005 Title A name given to the resource Lake Okaro : explosions and erosion : a study into erosion on the hills to the north of Lake Okaro and the 0.7 ka phreatic and hydrothermal eruptions at Lake Okaro to help understand the current geomorphology Subject The topic of the resource Hydrology Geothermal hydrothermal explosions https://theses.otagogeology.org.nz/files/original/ffd8ab56a13687dc481460a139ec6441.pdf 1695da2a5b70ecb73d9880001fc77641 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 Author last name Last name of the Author Marx Project type Is it an MSc, PhD, BSc(Hons) or PGDipSci? MSc Advisers Who supervised/advised this student White, J.D.L. Abstract The Abstract for this thesis The Rotorua volcanic centre (RVC) forms a well-defined topographic depression ? 21 km by 22 km in diameter that is located along, and partly delineates, a structural embayment in the western margin of the central TVZ. The late Quaternary lacustrine sedimentary record in the Rotorua depression probably began shortly after Rotorua Caldera formed with the eruption at ? 220 ka, of the voluminous Mamaku Ignimbrite. Initial sedimentation probably began with debris and hyperconcentrated flows, followed by lacustrine deposition as the new catchment adjusted to the volcanically created accommodation space. Three littoral terraces, formed during periods of stable high water levels surround Lake Rotorua. Deposits exposed in these terrace outcrops include those of beaches, subaqueous channels, fine-grained delta fronts and well-formed delta foresets. These can be separated by their geomorphology and field relationships, in particular by identifying the unconformities that separate highstand deposits. Sediment from these deposits was also characterised by Electron Microprobe analysis of glass shards, granulometry, their ferromagnesian mineral assemblage, and XRD and SEM analysis of samples obtained from different lacustrine deposits. This dataset allows construction of an integrated stratigraphic model from individual deposits and outcrops, informally subdividing them into three alloformations based on their bounding unconformities. Allostratigraphy provides an objective means of correlating heterogenous lacustrine deposits that are nevertheless genetically related. Lacustrine beds were deposited in deep lake waters during three time intervals, when Lake Rotorua was filled to between 65 m and 120m higher than today. Each suite of deposits is informally named for the volcanic event inferred to have initiated the high lake level. 1. Post-Mamaku alloformation (up to ? 415 m a.s.l.). 2. Post-Rotoiti alloformation (up to ? 380 m a.s.l.). 3. Post-Hauparu alloformation (up to ? 349 m a.s.l.). The first highstand, after the Rotorua depression formed, may have ended when the caldera wall adjacent to the Pohaturoa Dome collapsed, with this breach forming the Hemo Gorge. Subsequent high stands followed eruptions from the neighbouring Okataina Volcanic Centre that deposited large, northwardly dispersed, tephra deposits which formed natural dams across the Rotoiti channel, the northern outlet of Lake Rotorua. Eventually these dams were breached either by headward stream erosion or by land sliding of weak damming material. This channel was finally occluded at ? 9 ka and now contains Lake Rotoiti. At very high lake levels, the lake may have spilled across the caldera margin above Mission Bay; this water would have entered the Kaituna River, to drain into the Western Bay of Plenty. At this high level, the lake extended through the Hemo Gorge and flooded the neighbouring Kapenga depression, probably crossing the modem drainage divide and spilling into the Waikato River to the South. OURArchive handle The handle from the Otago University Research Archive (OURArchive) <a href="http://hdl.handle.net/10523/5421">http://hdl.handle.net/10523/5421</a> OURArchvive access level Open Access Department The department where the student is studying primarily. Geology Named locality Named locality describing the field area location. Lake Rotorua Thesis description Number of pages, maps, CDs, etc. 1 v. (various pagings) : ill. ; 30 cm. 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 2004Marx Creator An entity primarily responsible for making the resource Marx, Raymond Stanley. Date A point or period of time associated with an event in the lifecycle of the resource 2004 Title A name given to the resource Evolution of Lake Rotorua Subject The topic of the resource Volcanology Geomorphology lake sediment volcanic ash https://theses.otagogeology.org.nz/files/original/1359a4f0462103634e35523553e926c4.pdf f63f254e37101b6617fce91ce3d382d4 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 ((170.640393176036355 -45.838292944351664,170.672017138623147 -45.8642807444947,170.618208626766204 -45.872697072385421,170.608310434698666 -45.842769526217026,170.640393176036355 -45.838292944351664)) Author last name Last name of the Author Laurie Project type Is it an MSc, PhD, BSc(Hons) or PGDipSci? PGDipSci Advisers Who supervised/advised this student White, J.D.L. Abstract The Abstract for this thesis The most extensive period of Cenozoic volcanism in the Otago region, New Zealand is the Miocene Dunedin Volcanic Complex (DVC). The DVC has a diameter of 25 km and forms a conspicuous landform on the south-east coast of the South Island. The DVC is split into a western ridge and an eastern peninsula, separated by the Otago Harbour. Present day outcrop indicates the DVC is an eroded remnant of a much larger complex. Mapping still reveals a several hundred meter thick accumulation of alkaline volcanic rocks. The Otago Peninsula is part of the wider DVC. It was formed by volcanic eruptions varying from submarine, to emergent and fully sub-aerial eruption processes from various small vents, over several million years. This has resulted in a complex stratigraphy and has produced a wide range of volcanic and volcaniclastic deposits. The Otago Peninsula, in the mapped area, is characterized by small volcanoes and a volcanic system that includes plumbing, intrusions, volcanic edifices and other accoutrements of volcanic systems with small short lived eruption sites, and local eruptive centers that were active for substantial periods of time or were reactivated. Rocks of the DVC rest on Cretaceous and Tertiary sedimentary rocks, which are underlain by a pre-Cretaceous basement of quartzofeldspathic schist as indicated by clasts in the Port Chalmers Breccia. The sedimentary rocks comprise a non-marine basal unit and marine sandstones, mudstones, calcareous sandstones, bioclastic sandstones and glauconitic sandstones. There is a conspicuous absence of the more mafic volcanics, characteristic of other areas of the DVC. The dominate rock types identified include; widespread lapilli tuffs and diatreme remnants of phreatomagmatic origins, associated with trachytic lavas, and dikes, trachyandesite autobreccias, phonolites and basaltic rocks. Department The department where the student is studying primarily. Geology Named locality Named locality describing the field area location. Otago peninsula Thesis description Number of pages, maps, CDs, etc. 1 v. (unpaged) : col. ill., maps ; 30 cm. + 2 folded sheets, 1 folded map in pocket. 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 2004Laurie Creator An entity primarily responsible for making the resource Laurie, Blair. Date A point or period of time associated with an event in the lifecycle of the resource 2004 Title A name given to the resource Geology of the central Otago Peninsula Subject The topic of the resource Structural geology Dunedin volcanics