1 10 5 https://theses.otagogeology.org.nz/files/original/1e5d7f0255085f156e747edd510f2910.pdf 1b426fd14bb8fd381a9bc5dc64ed808b 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 Jones Project type Is it an MSc, PhD, BSc(Hons) or PGDipSci? MSc Advisers Who supervised/advised this student Wilson, G.S. Gorman, A.R. Abstract The Abstract for this thesis The Foulden Maar is part of the latest Oligocene - early Miocene Waipiata Volcanic Field and is located about 10 km to the southeast of Middlemarch, Central Otago, New Zealand. Its sediment-filled crater is approximately 1 km in diameter and includes laminites, debris flows and volcaniclastics. Three geophysical surveys of the Foulden Maar have been undertaken and these include seismic reflection, gravity and a magnetic investigation. Two boreholes have also been drilled at the site (FH1 and FH2) and the location of these was selected with the aid of the geophysical surveys. The seismic reflection study entailed the collection of four profiles across the diameter of the Foulden Maar. Explosive sources (150 g Pentex boosters) were used as the source, and 48 ×40 Hz geophones at a 5 m spacing were used to record the reflections. Signal within the data was optimised using a commercial seismic processing package by removing noisy traces, attenuating the airwave, applying refraction static corrections, deconvolving the waveforms, and applying automatic gain. Six facies were characterised in the stacked reflections based on dip direction, velocity, and depth (time). The sedimentary facies were the most well defined, with debris flows at the edges (marginal facies) and laminites filling the remaining accommodation space in the crater. The diatreme facies had a low reflectivity because it probably has a density which is similar to the Otago Schist (∼2.67 g/cm3). Re-flections from a deep antiformal structure (∼2 km) were identified and are likely to be from an old magma chamber or sill. A normal fault structure was also identified toward the west of the Maar, and this has an offset between 10 and 30 m. The FH2 borehole was drilled at 5516263N, 2292728E (NZGD1949) and 183.88 m of core was recovered with a diamond drill rig between the 23rd of June and the 3rd of July, 2009. FH2 contained four significant facies related to maar sedimentation. These were laminated diatomite, non-laminated diatomite, sandstone debris and a schist breccia. The facies were grouped into four stages of sedimentation (A-D) based on their succession. Whole core densities and P-wave velocities were measured for FH2 with a Multi Sensor Core Logger. These data sets were analysed in a geophysical interpretation package to generate a synthetic seismogram for the well location. The synthetic seismogram allowed for a detailed re-interpretation of seismic profiles based on the four stages of sedimentation. A gravity survey over the Foulden Maar involved the observation of 356 stations over eight profiles. Observations were made at 20 m intervals and accurate height information was gathered by differential GPS. Raw gravity data were corrected for drift and reduced to the Bouguer Anomaly (BA). The residual gravity field was exposed by occupation of 22 stations around Foulden Hills. This was extracted from the BA to give an oblate residual anomaly of -6.2 mGal centred toward the middle of the mapped diatomite deposit. The crater sediments were modelled in 2D for each of the eight profiles. Two bodies were used in the modelling; a diatomaceous body (1.27 g/cm3 ); and a sandstone body (2.22 g/cm3 ). A 3D model was created using an original method. The basal 3D surface of the modelled diatomaceous body has a maximum depth of 118 m while the sandstone body has a maximum depth of 194 m. The total field strength of 2011 magnetic stations were measured with a proton magnetometer during November, 2008. Data was processed to extract the effects of diurnal variation, account for magnetic infrastructure, and transform data to the pole, where the inducing field is vertical. Two high intensity, short wavelength trends were identified in the southwest, while longer wavelengths were also identified there (242 nT) and toward the centre of the mapped diatomite deposit (84 nT). Computer models were developed with basalt bodies, assigned a magnetic susceptibility of 0.0043 c.g.s. The models reveal that short wavelength trends are related to outcrops of basalt at the surface which penetrate to a depth of 600 m. The long wavelength trend in the southwest may be caused by an eroded basalt body while a feeder vent is probably the cause of the 84 nT intensity toward the centre of the Maar. Overall, the Foulden Maar conforms with the general maar model which was postulated by Lorenz (2003). The crater sediments have a bowl like shape, whereas the diatreme facies probably have a funnel shape. The Maar walls are steep sided within the diatreme breccia because the Foulden Maar is situated in a hard rock environment, and a diatreme depth of 1500 m is proposed, giving a ratio of about 4:7, for crater width to diatreme depth. There is a possibility that two maar craters exist at Foulden Hills, and evidence for this is found in the gravity and magnetic data. However, further investigations are needed to prove the theory. Therefore, the Foulden Maar is likely to have a similar structure to the Baruth and Messel maars in Germany, which have been defined by Schulz et al. (2005). OURArchive handle The handle from the Otago University Research Archive (OURArchive) <a href="http://hdl.handle.net/10523/2334">http://hdl.handle.net/10523/2334</a> OURArchvive access level Open Department The department where the student is studying primarily. Geology Named locality Named locality describing the field area location. Foulden Maar central Otago. Thesis description Number of pages, maps, CDs, etc. xvi, 223 p. : ill.(chiefly col.) ; 30 cm. + 1 DVD-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 2012Jones Creator An entity primarily responsible for making the resource Jones, Daniel Amir Date A point or period of time associated with an event in the lifecycle of the resource 2012 Title A name given to the resource The Geophysical Characterisation of the Foulden Maar Subject The topic of the resource Paleomagnetics Foulden Maar Geophysics. Waipiata Volcanic Field https://theses.otagogeology.org.nz/files/original/95cbf4f4b48c4ccde6c525e897828b44.pdf 5345c1502aa5ec944d6d770c568e625c 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 ((170.52696692159904 -45.403743677065485,170.531691806104988 -45.40393525163288,170.531204403806328 -45.408330714688788,170.526564903198135 -45.40811120008383,170.52696692159904 -45.403743677065485)) Author last name Last name of the Author Jones Project type Is it an MSc, PhD, BSc(Hons) or PGDipSci? BSc(Hons) Advisers Who supervised/advised this student Norris, R.J. Craw, D. Abstract The Abstract for this thesis The Golden Bar pit is part of the Macraes mine, the largest gold mine in New Zealand. The Macraes mine is mainly developed in the late metamorphic Hyde-Macraes Shear Zone. However, the Golden Bar pit was developed in a mineralised zone about 200 m structurally above the Hyde-Macraes Shear Zone. The host rocks are dominated by massive quartzofeldspathic schist (5-10 m layers) with minor intercalations (1-5 m scale) of micaceous schist. All the host schist has disseminated pyrite (micron to mm scale) from pervasive late metamorphic hydrothermal alteration. In addition, there has been more localised (metre scale) relatively intense hydrothermal alteration controlled by shears subparallel to foliation. Gold occurs in three types of mineralised rock: silicified schist, which dominates, fissile black sheared rock, and cross-cutting quartz veins. There are three principal structural zones in the deposit: (a) a strongly sheared micaceous and graphitic zone at the base of the structural sequence; (b) a weakly deformed schist zone cut by relatively flat-lying (S 20° dipping) quartz veins; and (c) a stack of imbricated schist pods and deformed silicified schist confined between two sub-parallel low-angle N (.ea: 30°) shears. These structural zones were juxtaposed during thrust deformation. The lower black shear zone has m-scale folding and overthrust packages, kink folding and foliation stacking with associated striations that imply west-directed thrusting. Striations and imbrication geometry between the upper two shears imply oblique thrusting that was directed towards the west. Post-mineralisation normal faults locally disrupt the mineralised zone. The Golden Bar pit mineralised zone has some of the structural and mineralogical characteristics of the main Hyde-Macraes Shear Zone, and may be genetically related. Department The department where the student is studying primarily. Geology Named locality Named locality describing the field area location. Otago east Macraes Flat Thesis description Number of pages, maps, CDs, etc. vi, 84, [6] leaves : ill., maps ; 30 cm. + 3 charts. 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 2006Jones_P Creator An entity primarily responsible for making the resource Jones, Philip Hamish. 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 Structural controls on hydrothermal gold mineralisation above the Hyde-Macraes Shear Zone, Golden Bar pit, Macraes, east Otago Subject The topic of the resource Mineralogy Map Hydrothemal gold mining hydrothermal gold mineralisation https://theses.otagogeology.org.nz/files/original/7f2ea3e5174d64f630720ed131daf4ad.pdf 7a8b72476bd901ae250237c567870231 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 ((170.667556083684985 -45.648633678348574,170.608295575084298 -45.716516952971503,170.551494081994804 -45.715011268401042,170.556400753985855 -45.646912454014121,170.667556083684985 -45.648633678348574)) Author last name Last name of the Author Jones Project type Is it an MSc, PhD, BSc(Hons) or PGDipSci? PGDipSci Advisers Who supervised/advised this student Norris, R.J. Abstract The Abstract for this thesis Slope failures in the Seacliff- Kilmog Hill region are a major issue. They affect the road and rail networks that are a major lifeline to the city ofDunedin. State Highway 1 runs through this area and was realigned in the late 1960s. This led to slope stability issues such as the Site Office Slide. The underlying geology of the area is dominantly made up of the clay rich Onekakara Group, with knobs ofvolcanics and sandstones resting on top. The abundance of Onekakara Group located at the surface is the main reason behind slope stability issues found in this area. Analysis revealed that slope failures dominantly occur in the southeast direction, and less so in the northwest direction. Low angle slopes were shown to offer little resistance to slope failures, with the majority of failures occurring between 1 0 - 20 degrees. Mass wasting is occurring on a large scale with 3 - 4 large landslide complexes, slowly creeping towards the coast. Within the debris of these complexes slope failures are common and generally occur as debris flows. A simple landslide hazard map was produced and indicated regions of high, medium and low risk. It was found that the majority of SH 1 lies within the high-risk category. Residential areas at Warrington and baches along the coast lay within the low risk category. This may have implications for future development in the area, but it is suggested that the hazard map be used as a qualitative guide to susceptibility to slope failures. OURArchive handle The handle from the Otago University Research Archive (OURArchive) <a href="http://hdl.handle.net/10523/3808">http://hdl.handle.net/10523/3808</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. Seacliff Kilmog Hill Otago east Thesis description Number of pages, maps, CDs, etc. 50 Leaves. Ill.(some col). Maps (folded in pocket); 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 2006Jones_A Creator An entity primarily responsible for making the resource Jones, Anthony F. E. (Anthony Francis Elliott) 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 Landslides in the Seacliff-Kilmog Hill area, East Otago, New Zealand Subject The topic of the resource Structural geology Map landslide https://theses.otagogeology.org.nz/files/original/1b43e45fdfba09d0aad1465cfa58ad68.pdf da59ffefe477a9c064298a5e5dc8ea37 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 ((163.378953558654871 -78.244129495695148,163.320451391143621 -78.24399711408131,163.289129795634267 -78.239039087695318,163.223953103289858 -78.228697807990926,163.021908104769608 -78.196431555031523,163.022455241220285 -78.189724459182656,163.022634293744574 -78.187527903959761,163.024993598917746 -78.158509345475423,163.056682040419474 -78.153071896379089,163.126425354737165 -78.141074798320034,163.217779473052445 -78.125298088248812,163.342141622797953 -78.103707029200748,163.452640433283364 -78.10354058335993,163.505619187428607 -78.103445532892835,163.597444721003626 -78.103257376214529,163.712650340725361 -78.102979315955864,163.734187422125501 -78.102922148109315,163.837061729357657 -78.116479442583199,163.861344668558957 -78.119669704847993,163.935214505393787 -78.12935153118022,163.935318932901822 -78.136936959188574,163.935545277817056 -78.153345586071509,163.935779761392126 -78.170297289583502,163.9360470408445 -78.189561742054025,163.620311001580689 -78.226923820518422,163.604456902633473 -78.22878459782082,163.515357308887332 -78.239215072326232,163.471650573727345 -78.244314865654502,163.434518452475544 -78.244244201288069,163.415921545302155 -78.244207007010019,163.378953558654871 -78.244129495695148)) Author last name Last name of the Author Jones Project type Is it an MSc, PhD, BSc(Hons) or PGDipSci? MSc Advisers Who supervised/advised this student Craw, D. Abstract The Abstract for this thesis Four granitoid plutons, belonging to the DV1a and DV1b plutonic suites, intrude Koettlitz Group metasediments in the Walcott Bay area, South Victoria Land, Antarctica. The plutons display markedly different structural styles, reflecting their emplacement during progressive uplift in the Paleozoic Ross Orogeny. In order of intrusion: 1) Bonney Pluton (530-520 Ma), a regionally extensive hornblende-biotite body, with the southern end mapped in the Walcott Bay area. The pluton syn-kinematically intrudes the metasediments at mid-upper amphibolite fades conditions, 7<>0°C, 5±1 kbars. Fabric development is variable with magmatic flow fabrics at the NE margin and central parts of the body changing to solid-state fabrics along the SW margin Host rock foliations are parallel to pluton margins. 2) Armitage Pluton is a hornblende-biotite DV1a body, chemically distinct from Bonney Pluton, which intrudes central parts of Bonney Pluton at a late stage of the host granite crystallisation. A weak magmatic lineation is present, sub-parallel to magmatic lineations in central parts of Bonney Pluton. 3) Chancellor Orthogneiss is a strongly deformed biotite DV1b body which discordantly intrudes metasediments as randomly orierued dykes and stocks. Solid-state deformation fabrics overprint magmatic fabrics throughout the body indicating post-emplacement ductile deformation. This body was emplaced close to or at the brittle-ductile transition, at least biotite zone, 250-350°C, 10-15 km depth. 4) Hidden Granite is an undeformed DV1b biotite granite which discordantly intrudes metasediments and older granitoid bodies as randomly oriented dykes and stocks. The granite was emplaced into a brittle host rock, above the brittle-ductile tranisition, less than 250-350°C. Hidden Granite is coevally intruded by a swarm of gabbroic to intermediate plugs, dykes and near horizontal· sills (1-40m thick) of the Keyhole Mafic Suite, a genetically related group of mafic bodies with high-K calc-alkaline affinities. Contact relations between the mafic bodies and host granite such as: lobate to crenulate boundaries; enclave swarms; diffuse flame-like contacts; a lack of chilled margins and back-dyking of the mafic bodies indicates the mafic bodies are coeval with Hidden granite. The mafic bodies are divided into two end-member groups (irregular plugs and sheet-like bodies), based on structural features. Contact relations of the irregular plugs and the host granite are generally more variable than the sheet-like bodies. The orientation of the plugs is random whereas the consistent NE-SW orientation of vertical sheet-like bodies indicates a degree of regional structural control on their emplacement. The degree of interaction between mafic and felsic phases generally decreases as the mafic bodies become more sheet-like in form. These changes could reflect the increasing crystallinity of the host granite.Field observations, petrology and geochemical data indicates chemical interaction accompanies physical mixing in the strongly mingled margins to form hybrid zones (at least at a centimetre scale). However, chemical mixing is most likely insignificant at margins of the sheet-like bodies, even though in detail, these boundaries are quite gradational. Vertical NE-SW oriented bodies of the Keyhole Mafic Suite are parallel to a younger swarm of mafic and felsic porphyry dykes which consistently strike 040°. The dyke orientation suggests crusta! extension during dyke emplacement was oriented NW-SE. This extension direction is approximately parallel to the elongation direction of post-emplacement ductile deformation fabrics in Chancellor Orthogneiss and suggests a geometric relationship between the ductile and brittle fabrics. The younger dyke swarm was emplaced towards the end of the Paleozoic Ross Orogeny and forms the dominant NE-SW brittle fabric in the basement rocks. A sequence of brittle fabrics in Hidden Valley indicates repeated reactivation of the inherited crustal anisotropy. The sequence is as follows: 1) Paleozoic NE-SW oriented dykes; 2) hydrothermally altered quartz-filled extensional fractures which occur within or parallel to the dykes; 3) NW-SE dextral faults offset dykes and fractures at right angles and are steeply dipping (to near vertical) with strikes between 110° to 140°; 4) NE-SW oriented structures crosscut young s'urface features and lie parallel to the dykes. These brittle features represent a late Quaternary sinistral reactivation of the pre-existing anisotropy. The late Quaternary faults indicate that this area of South Victoria Land is still tectonically active as indicated by the high topographic relief and active alkaline volcanism in the rift zone. Department The department where the student is studying primarily. Geology Named locality Named locality describing the field area location. Walcott Bay South Victoria Land Antarctica Thesis description Number of pages, maps, CDs, etc. xiii, 198 p. : ill. (some col.), maps (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 1995Jones_S Creator An entity primarily responsible for making the resource Jones, Sarah Anne. Date A point or period of time associated with an event in the lifecycle of the resource 1995 Title A name given to the resource Structural evolution of northern Walcott Bay, South Victoria Land, Antarctica / Sarah Anne Jones. Subject The topic of the resource Structural geology Antarctica South Victoria Land structure Walcott Bay https://theses.otagogeology.org.nz/files/original/471f6f8a0fa2e23f35cf3c5343358660.pdf a8abfa3602f363b1d43934921d121b5a 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 Jones Project type Is it an MSc, PhD, BSc(Hons) or PGDipSci? MSc Advisers Who supervised/advised this student Fordyce, R.E. Abstract The Abstract for this thesis A new genus and new species of large fossil penguin is described, based on three well preserved substantially complete articulated skeletons. Elements or complexes represented are the rostrum; parts of the cranium including quadrate, mandible, many vertebrae and the pygostyle, many ribs, sternum, coracoid, scapula, all of the forelimb, pelvis, femur, tibia, tarsus, and most of the digits. Six previously described supposedly indeterminate specimens are referred to the new taxon. All . specimens are from the Kokoamu Greensand (upper Whaingaroan to Duntroonian · Stage, Upper Oligocene) of the Duntroon and Waihao districts, South Island, New Zealand. The newly described material usefully links many elements known previously from isolated bones. The partial skeletons thus provide much phylogenetic and functional information hitherto unavailable through the study of single bones. This information helps elucidate broader evolutionary relationships amongst fossil penguins. In this study, potentially useful taxonomic characters were identified using both literature and comparisons between the new fossil species and other described fossil and modern taxa. The states for these characters were determined for twenty nine modern, fossil and outgroup taxa including a possible ancestral fossil penguin (OU 12651). Cladograms were generated using the program PAUP version 3.1 (Phylogenetic Analysis Using Parsimony). The resulting consensus tree reinforced the monophyly of penguins. Within the penguin clade, six discrete groups were identified, each formed by either multi~axa, monophyletic clades or clusters of monospecific paraphyletic stem groups. Each group was separated by many state changes; of note, there is a major structural gap between Eocene/Oligocene penguins (including the new species), and later Neogene to Recent taxa. The new species was positioned in the middle of the stem group. Analyses of functional morphology and scaling in th~ new fossil species identified a range of skull pectoral girdle, forelimb and hindlimb features that differed from modem species. A body mass estimate of 60 kg is based on forelimb surface area. The stratigraphic distribution of fossil species and the disappearance of large fossil penguins is discussed in light of the results of the phylogenetic and functional analysis. Department The department where the student is studying primarily. Geology Named locality Named locality describing the field area location. Canterbury Otago Thesis description Number of pages, maps, CDs, etc. vii, 188 leaves, 35 leaves of plates : ill. (some col.), 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 1995Jones_CM Creator An entity primarily responsible for making the resource Jones, Craig M. Date A point or period of time associated with an event in the lifecycle of the resource 1995 Title A name given to the resource Systematics of a new fossil penguin (Spheniscidae) from the Kokoamu Greensand (Duntroonian stage, upper Oligocene), South Island, New Zealand Subject The topic of the resource Paleontology Sedimentology Aves Canterbury Foraminifera Otago