1 10 20 https://theses.otagogeology.org.nz/files/original/4c608658f9e0ba677218e7e895515394.pdf eeca980a0a10ab9e146e741388c45f2b 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 Anderson Project type Is it an MSc, PhD, BSc(Hons) or PGDipSci? BSc(Hons) Advisers Who supervised/advised this student Landis, C.A. Reay, A. Abstract The Abstract for this thesis Beach and offshore sediments were systematically sampled and studied during this work. Textural studies resulted in both on and offshore sediments being modelled by mixing of two modes, a fine modern modal population and a coarse relict modal population. The modern mode is analogous for beach and offshore sediments, the relict mode is finer in the beaches than offshore. This fining is due to abrasion and drowning of coarser clasts by the transgressing sea. With the use of a microprobe, detrital grains were analysed and compared to analyses of minerals from inferred source areas. Appraisal of all textural, mineralogical and chemical data results in definition of the nature of the sources of the Kakanui sediments. Green hornblende and hypersthene are inferred to be derived from the rocks of the Waiau catchment or gabbroic bodies of southern New Zealand. Epidote and MnO rich garnets are derived from the Haast Schist Group. Brown hornblende, enstatite, spinel, clinopyroxene and pyrope garnet are derived from erosion of mantle derived material contained in the Kakanui Mineral Breccia or associated vents. A vent is concluded to occur approximately 4km offshore. Two sources for glauconite were concluded. Sediment from the Waianakarua River and coastal erosion of the Gees Greensand at Gees Point. Titanaugite are concluded as being derived from the Dunedin and associated alkalic volcanics of East Otago. Department The department where the student is studying primarily. Geology Named locality Named locality describing the field area location. Kakanui Otago north Thesis description Number of pages, maps, CDs, etc. v. 180 p. ill. Photos. 30 cm. Location WKT (WGS84) The location stored in WKT (WGS84) format POLYGON ((170.88 -45.17, 170.92 -45.17, 170.92 -45.21, 170.88 -45.21, 170.88 -45.17)) 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 Beach and Continental Shelf Recent Sedimentation of the Kakanui District, North Otago. Identifier An unambiguous reference to the resource within a given context 1982Anderson Creator An entity primarily responsible for making the resource Anderson, SG Date A point or period of time associated with an event in the lifecycle of the resource 1982 Subject The topic of the resource Marine geology Sedimentary petrology Sedimentology Mineralogy beach sediment shelf sediment https://theses.otagogeology.org.nz/files/original/e7239213f9c0a67e3d9bb2133a100895.pdf 8848c775979d1aeeafed41e0524ec414 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 ((168.781473646059908 -44.954535188228874,168.838680682954475 -44.956637730288598,168.834180307065822 -45.004823227209428,168.778669589788365 -45.001828549862559,168.781473646059908 -44.954535188228874)) Author last name Last name of the Author Bayer Project type Is it an MSc, PhD, BSc(Hons) or PGDipSci? MSc Advisers Who supervised/advised this student Martin, C.E. Schallenberg, M. Abstract The Abstract for this thesis In this study macronutrient and trace element (B, Cu, Fe, Si, Mo, Zn) limitation of phytoplankton growth in Lake Hayes, Otago, was investigated from March to July 2006, using nutrient enrichment bioassay experiments. In addition, groundwater and surface water were compared in their importance as sources of macronutrients and trace elements to the lake. Bioassay experiments suggest that phytoplankton growth was limited by N and Zn in May 2006. Although no direct conclusions can be drawn from bioassays in March and April, nutrient data indicates a potential shortage of dissolved nutrients, and a potential for N, or NP limitation in these months. This indicates that N (still) seems to be the limiting macronutrient in Lake Hayes late in the stratification period despite, or probably because of, land use changes in the catchment. Probably as a result of high nutrient stress in March and April, the phytoplankton community was dominated by Ceratium, a mixotrophic dinoflagellate, which is assumed to have a competitive advantage in times of shortage of inorganic nutrients. Due to Ceratium 's mixotrophy phytoplankton growth was not necessarily limited by the availability of dissolved inorganic nutrient in March and April, despite the low supply. Groundwater was found to be an important contributor of N, Si and some essential trace elements (B, Se, and Zn) to Lake Hayes from March to July 2006. Although no direct groundwater influx to the lake was recorded, influx via the Lake Hayes Spring supplied approximately one third of the total external nitrate load and 20% of Zn, despite the spring only accounting for 10 % of the total water influx. Future management should take into consideration that groundwater is an important pathway of nitrate and trace element influx. Department The department where the student is studying primarily. Geology Named locality Named locality describing the field area location. Lake Hayes Otago Thesis description Number of pages, maps, CDs, etc. v. 113 p ill., diagrams., 30cm. 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 2006Bayer Creator An entity primarily responsible for making the resource Bayer, Tina 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 Nutrient and trace element limitation of phytoplankton growth and effects of groundwater influx, Lake Hayes, Otago Subject The topic of the resource Macro nutrient limitations of phytoplankton Lake Hayes macrtnutrients Phytoplankton Ttace elements https://theses.otagogeology.org.nz/files/original/75b5f961d259e77ab56d70cfa3fb8830.pdf 0807399922b65521b24443691f74fdcb 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 (((170.609321054418956 -45.455228026503654,170.611023917892567 -45.452763714561065,170.716139093469394 -45.531125784359006,170.609321054418956 -45.455228026503654)),((170.321698845852012 -45.867905864741019,170.169807260542541 -46.14620484708496,169.747845574527219 -46.19021751020783,169.904071956453322 -45.874492024406827,169.881739752211161 -44.930247273080035,170.609321054418956 -45.455228026503654,170.321698845852012 -45.867905864741019))) Author last name Last name of the Author Németh Project type Is it an MSc, PhD, BSc(Hons) or PGDipSci? PhD Advisers Who supervised/advised this student White, J.D.L. Reay, A. Abstract The Abstract for this thesis The Miocene Waipiata Volcanic Field (WVF), New Zealand, is an eroded phreatomagmatic volcanic field. Three different types of vent or vent complex were recognized. Vent-filling deposits comprising predominantly lava, preserved in the form of plugs, necks, lava lake remnants, lava flows, or dykes, were classified as Type 1 vents. Type 1 vents are inferred to be the remnants of scoria cones, most of them with thin basal phreatomagmatic pyroclastic deposits. Vents represented by predominantly pyroclastic infill are classified as Type 2 vents. Type 2 vents are inferred to have been the substructures of phreatomagmatic tuff ring/maar volcanoes, many of which may have had associated scoria cones. Type 3 vent complexes are groups of closely spaced or overlapping vents, with voluminous preserved lava flows. Type 3 vent complexes are the remnants nested maars and tuff rings with associated magmatic explosive and effusive products. Pyroclastic rocks of most of the Waipiata vents record initial phreatomagmatic explosive activity fuelled by groundwater followed by Strombolian-style eruptions. Erosion rates for the WVF are 5 to 50 m per million years. Cenozoic sedimentary cover was widespread and still complete ( e.g. 200 – 400 m thick Oligocene marine units) at the time of volcanism, although over much of the field no Cenozoic sedimentary rock units remain today . Vent alignments largely follow the basement structural pattern of the Otago Schist, defining NESW and NW-SE trends. The longest vent alignment, traceable in ~ 30 km, coincides with and is parallel to the largest fault zone in the Otago region, the NW-SE trending Waihemo- fault zone. The total volume of magma erupted in the WVF is estimated to have been ~ 9 to 40 km^3 DRE. A systematic compositional sequence exists at each volcano, with initial phreatomagmatic eruptive products being differentiated tephrite and phonotephrite composition, whereas subsequent lava flows and dykes are of primarily basanite. Basanite was parental to the tephrite and phonotephrite. Basanite generated beneath WVF appears to have “failed” to reach the surface, instead being captured en route and stored to produce tephrite phonotephrite via 15-25 % crystal fractionation of olivine and clinopyroxene. Many attempted eruptions of parental basanite "failed", and that each successful eruption at the surface involved both a newly-injected basanite from depth, and a transected and entrained remnant of melt evolved from magma captured at shallower depths from a preceding "failed" eruption. Significant amount of magma was underplated beneath or injected into the crust of the WVF. The Otago crust is density and rheologically stratified, and in the Miocene lay within a mild extensional (strike- slip) tectonic regime; this combination was responsible for the entrapment of magma at various levels in the Waipiata – Dunedin region. The WVF-wide trend in magma evolution at individual vents has also been demonstrated from the mild extension-related Late Miocene Bakony- Balaton Highland Volcanic Field (BBHVF), Hungary. Recognition of this pattern at two unrelated fields may suggest that initial injection, with subsequent entrainment to produce dual-source monogenetic eruptions may be common in intracontinental alkaline basaltic volcanic fields. It is suggested that the lithospheric density and rheological structure, together with the state of stress, play an important role in fostering magma injection and entrapment in areas where the crust is 1) strongly density stratified, 2) relatively thin, 3) hot (high heat flow), and 4) the crustal stress regime mildly extensional, preferably with strike slip movements. These conditions were shared by the WVF and the BBHVF, with the result that magmas, processes of storage and differentiation, and ultimate eruption and volcano formation were in many ways remarkably similar. Department The department where the student is studying primarily. Geology Named locality Named locality describing the field area location. Waipiata Otago north Thesis description Number of pages, maps, CDs, etc. 2 v. : ill. (some col.), maps (1 folded, col.) ; 30 cm. + 1 computer disk. 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 2001Nemeth Creator An entity primarily responsible for making the resource Németh, Károly, 1969- Date A point or period of time associated with an event in the lifecycle of the resource 2001 Title A name given to the resource Phreatomagmatic volcanism at the Waipiata volcanic field, Otago, New Zealand Subject The topic of the resource Volcanology Igneous geology Structural geology Map basanite erosion Hungary maar New Zealand phreatomagmatic scoria tephrite vent 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 https://theses.otagogeology.org.nz/files/original/755c7fcb271b6ee9304fc9994934571f.pdf ac6eac18323ecaac0f202dc1e3640930 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 ((171.39003488700007 -45.966419637999934,171.183020564000117 -45.905355971999938,170.90053917900002 -45.821208868999975,170.829627050000113 -45.799934675999964,170.832287560000054 -45.795726167999931,170.863984066000057 -45.745575483999971,170.899838046000013 -45.68872674399995,170.978640416000076 -45.690077896999981,171.460010147000048 -45.697167642999943,171.717401223000024 -45.700139412999931,171.717301624000015 -45.704824938999934,171.715086786000029 -45.808960387999946,171.711653447000117 -45.970204359999968,171.709745312000109 -46.059740873999942,171.39003488700007 -45.966419637999934)) Author last name Last name of the Author Gray Project type Is it an MSc, PhD, BSc(Hons) or PGDipSci? MSc Advisers Who supervised/advised this student Landis, C.A. Koons, P. Abstract The Abstract for this thesis High resolution sub-bottom reflection seismic profiles, sediment sample analysis and visual observation of the Karitane Canyon are correlated with multichannel seismics, known sediment distribution patterns and information from the wildcat exploration well Galleon-1 to compose an account of the structure and evolutionary history of the Karitane Canyon in relation to the Otago shelf. The sedimentary pathways on the southeastem coast of New Zealand, through which sediments derived from central and eastern Otago travel in their transition from inland areas to the deep sea, comprises the Otago Submarine canyons at the shelf break channelling sediment down the Bounty Channel via the Bounty Trough until it ultimately deposits on the Bounty Fan Complex. This system is known to have existed for around 55 million years. The Karitane Canyon is one of the submarine canyons that constitutes the Otago Fan Complex. Evidence presented here from high resolution subbottom seismic profiles collected for this study suggest the Karitane Canyon has been actively channelling sediment downslope for at least 2.4 million years, and possibly for as long as 4.2 Million years, in response to a changing tectonic regime during the Late Cenozoic. Large-scale foresets, progradational clinoforms, drape structures, and erosional surfaces and channels are all features that occur in these profiles. Deposition of relatively thick - Pleistocene sequences over the shelf break is controlled by changes in relative sea level due to eustatic sea level fluctuations and the local tectonic situation. Seismically reflective strata identified in high resolution sub-bottom profiles are correlated with the wildcat exploratory well Galleon-1 for lithological and age data. Remote Operated Vehicle (ROV) footage of five investigative dives gives visual confirmation of the nature of sediment on the sea floor, and biological colonization of outcrop at the head and in the walls of Karitane Canyon. Fossil tributary channels enter the open valley that is the Kari tane Canyon of today all the way from the inner shelf toward the head (directly off Pleasant River), to the shelf break. These channels are in the order of 170 m to 190 m deep and up to 1.5 km wide. Many of the well preserved channels appear to be related to the last major glacial period of the Pleistocene as they often cut through Pliocene to Pleistocene strata. Department The department where the student is studying primarily. Geology Named locality Named locality describing the field area location. Karitane Canyon Otago Thesis description Number of pages, maps, CDs, etc. 150 p. : ill. (some col.), maps ; 22 x 31 cm. + 2 videos. 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 1993Gray Creator An entity primarily responsible for making the resource Gray, Fiona L. (Fiona Lyn), 1967- Date A point or period of time associated with an event in the lifecycle of the resource 1993 Title A name given to the resource Karitane Canyon : a submarine valley cut into the Otago continental shelf Subject The topic of the resource Marine geology Karitane Canyon marine geophysics https://theses.otagogeology.org.nz/files/original/39f26bc178d17acfad7b9d08832465dc.pdf 2a30547a7342533fafbe5afce4b60cbe 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 Karubaba 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 The thesis deals with the statistical interpretations of stream sediment geochemical data to show the potential areas for exploration of precious and base metals in Kabupaten Yapen Waropen of the Irian Jaya Province of Indonesia, and the •u.u ..... v .. of arsenic as an indicator element for detecting gold-tungsten mineralisation in Macraes area and the surrounding t. Apart from the statistical interpretations, this thesis introduces two new statistical models for threshold determinations. first method is a univariate method and was initially developed in this study. The second method is the application of the Jviahalanobis distance for a multivariate threshold determination. The anomalous samples of Kabupaten Waropen have been determined by setting the threshold value equal to the mean plus ··two standard deviations. The statistical interpretations of the data indicate that the eastern part of Yapen Island is favorable for follow up exploration because most of the anomalies (Au, Ag, Cu, Pb, Zn, As and Bi) are grouped on the eastern side of the island. The anomalies are consistent with the presence of the Jobi Ophiolite Hydrothermal Breccia and caldera structure which are a good indicator for detecting epithermal ore deposits. Three known elemental sources, gold-tungsten mineralisation in Macraes area, the Haast Schist bedrock and volcanic rocks of the Pigroot area, were used to study the downstream distribution patterns of arsenic and other associated elements in Deepdell Creek and Shag River. The study has established backgrounds of the elements, measuring different 'dimensions' of the elemental ·variation and elucidating the relationship between elemental variables in multivariate data using the principal component and canonical discriminant function analysis theories as well as examination of the downstream elemental mobilisation and ·correlation matrix to identify the interelement relationship. The downstream spatial trends of arsenic content in stream sediments and water of Oeepdell Creek are negatively correlated. This is a useful prospecting tool for gold-tungsten mineralisation. The ·principal component analysis indicates that the anomaly index model for detecting gold-tungsten mineralisation can be written as GTM = {(0.87 As + 0.13 Cr + 0.13 Zn + 0.12 V+ 0.11 Ni + 0. 01 La) - (0.58 Cu + 0.15 Ba + 0. 12 Nb + 0.08 Se+ 0.03 Nd)} where As, Cr, ..... , Nd here represent the concentration values from a set of data after they have been standardised to have zero means and unit standard deviations. The GTM model is consistent with the observed geochemistry that As-bearing fluids will lead to the precipitation of goldtungsten minerals with depletion of Ba in the schist host rock. The exploration implication of the GTM model is that, stream sediment samples that are close to or exceed the unity of GTM and contain multiple anomalies of As, Cr, Zn, Ni and La are useful properties for detecting gold-tungsten mineralisation. Arsenic is the real indicator for detecting gold-tungsten mineralisation as shown by positive high coefficient (0.87) of the GTM model, the elements are incidental. The relative geochemical difference between Deepdell Creek and Shag River is shown in the canonical discriminant function analysis mainly by the ratio of As to Ba. High ratio of As to Ba in stream sediments of Deepdell Creek is a good indicator for detecting gold-tungsten mineralisation. The different types of the statistical analyses that have been carried out to investigate different aspects of the same stream sediment geochemical data from the Shag catchment indicate that arsenic is the best pathfinder element for detecting goldtungsten mineralisation in stream sediment surveys in Macraes area and the surrounding district. The new univariate statistical model for the threshold determination can be written as GTh = exp ( z + 21 Y2 ) + 2- -J (cxp (2z + Y2 ){ exp (Y 2 ) - 1}) where z and Y here represent the pooled estimate of the sample mean and standard deviation of log normal distribution. The initial application of the GTh model to the stream sediment geochemical data from Deepdell Creek, upper and lower Shag River, considered in this thesis, has yielded useful results. The study has showed that the GTh model is better than the arithmetic mean plus two standard deviations for establishing the geochemical threshold of log normal distribution. The comparative study was investigated by using statistical tests of significance of mean values in terms of the thresholds. The thresholds calculated by the two methods, were based on the sample randomisation and with respect to the normal and log normal distributions of the stream sediment geochemical data from Deepdell Creek, upper and lower Shag River. The GTh model is comparable to the arithmetic mean plus two standard deviations, the two models always give similar threshold result for a normal distributed data. Control on the normality of a set of data can be investigated by the equality of threshold values produced by the two models. The GTh model would give a precise threshold value compared to the arithmetic mean plus two standard deviations for a log normal distributed data because it uses information on the mean and standard deviation of log normal behaviour. The GTh model is an alternative way of establishing the geochemical threshold for normal or log normal distributed data because it is robust with respect to normal or log normal distribution. Mahalanobis distance, a multivariate statistical method, has been suggested as a criterion for detecting multivariate outliers. This method can be used for oG.tlining stream sediment geochemical anomalous data in mineral exploration. The main strength of Mahalanobis distance analysis lies on its simplicity to describe the data in terms of anomalous indices and anomalous variables. The initial application of Mahalanobis distance to Yapen, Miosnum and Ambai Islands stream sediment geochemical data considered in this study has yielded useful qualitative and quantitative results, but its significance should be further justified by geologists. Department The department where the student is studying primarily. Geology Named locality Named locality describing the field area location. Kabupaten Yapen Waropen Irian Jaya Indonesia Shag Catchment Otago New Zealand Thesis description Number of pages, maps, CDs, etc. viii, 168 p. : col. 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 1992Karubaba Creator An entity primarily responsible for making the resource Karubaba, Jannes Johan John, 1953- Date A point or period of time associated with an event in the lifecycle of the resource 1992 Title A name given to the resource Statistical interpretations of stream sediment geochemical data of Kabupaten Yapen Waropen, Irian Jaya, Indonesia and the Shag catchment, Otago, New Zealand, and modern models for threshold determination Subject The topic of the resource Geochemistry exploration geochemistry Indonesia Otago https://theses.otagogeology.org.nz/files/original/69e6d18584f46e4a4c184a4f9fe1e3b9.pdf 0070a0f23072179793a2568687ba86c9 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 ((168.429918499477537 -44.738845776927832,168.433071468057932 -44.690383289074227,168.503010979147547 -44.692688043371838,168.497843300004462 -44.742025660596362,168.429918499477537 -44.738845776927832)) Author last name Last name of the Author Hay 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 Wakatipu, N.W. Otago, N.Z. The Invincible Au bearing lode occupies a near vertical fault (~060/80E). The Invincible lode fault (I.L.F.) crosscuts the regional west dipping (~50°) schistosity on the eastern limb of the Earnslaw Synform. The host schists are metamorphosed to lowest greenschist fades (chlorite zone, Textural Zone III) and are thought to be part of the metavolcanic-rich Aspiring terrane. Fault structure suggests that the I.L.F. was initially a west dipping normal fault, at the brittle/ ductile transition zone, before the formation of the Earnslaw Synform in late Oligocene times and most likely in the mid-late Cretaceous. Faulting style later changed to high angle reverse, before the commencement of the Earnslaw Synform formation, whilst still within the brittle/ ductile transition zone. Deformation changed from brittle/ ductile to purely brittle with regional uplift. Rotation of the I.L.F. on the eastern limb of the Earnslaw Synform was associated with purely brittle high angle reverse faulting. Textural evidence of brittle/ ductile deformation in the lode suggests that the mineralisation event occurred whilst the I.L.F. was a normal fault, at the brittle/ ductile transition zone. Native Au commonly occurs as blebs within quartz. Occurrences of Fe-sulphides ± Au are also common. Au and As are the elements indicative of mineralisation and are thought to have been introduced by the mineralising fluid. Unusually low amounts of scheelite, for an Otago Schist mesothermal deposit in a scheelite rich region, is caused by the relatively low CaO content of the host schists. Hydrothermal alteration extends for <<1m from the lode, and is characterised by the presence of sulphides. There is no other mineralogical alteration, except the recrystallisation of chlorite. Significant Cr enrichments in the altered schist suggests that the mineralising fluids passed through, or were generated within, Cr-rich rocks such as metavolcanic greenschists of the Aspiring terrane. The common presence of the metamorphic assemblage quartz/ albite/ muscovite/ chlorite in lode vein material suggests that the prevailing mineralising conditions were similar to the metamorphic conditions that formed the host schist, and that the mineralising fluids were in equilibrium with most host rock minerals. Au transport is thought to have been due to a high fS2 in the mineralising fluid, which was out of equilibrium with the host rock. Fe-sulphides precipitated in the lode zone, which lowered the fS2 in the fluid leading to Au precipitation. Arsenopyrite geothermometry, combined with fluid inclusion homogenisation temperature and density determinations, resulted in an estimate of 325-375°C and 2.5-4.1 kbars for the formation conditions of the I.L.F. Fluid inclusion studies indicate a mineralising fluid of very low apparent salinity (~l wt% equivalent NaCl). The Invincible C and O fluid isotopic composition is consistent with a metamorphic source for the mineralising fluid. The fluid isotopic composition is relatively δ13C enriched, due to the relatively low graphite content of the host schist. The δ18O fluid composition suggests that meteoric water was either not involved in mineralisation, or that water/rock interaction has eliminated the meteoric signature. Invincible and nearby Glenorchy vein systems have different structural styles of deformation and are present at the same erosional level, suggesting that they are of different generations. The Invincible and Macraes lodes have many similarities and most differences can be explained by differences in host rock chemistry. More extensive ductile deformation at Invincible suggests that Invincible was the earliest formed deposit in the Otago Schist. Department The department where the student is studying primarily. Geology Named locality Named locality describing the field area location. Rees Valley Otago Thesis description Number of pages, maps, CDs, etc. 153 p., [3] folded leaves : col. 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 1991Hay Creator An entity primarily responsible for making the resource Hay, Richard M. (Richard Mark), 1966- Date A point or period of time associated with an event in the lifecycle of the resource 1991 Title A name given to the resource Invincible Gold Mine, Rees Valley, N.W. Otago, New Zealand Subject The topic of the resource Metal-ore deposits gold Invincible Gold Mine Otago Region Rees River https://theses.otagogeology.org.nz/files/original/9d26b3baafff3388d6bdf30c41cf5f11.pdf d2b5a92fd8fcc26b9bf545c0688da991 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 ((169.781036103000019 -46.455537275999973,169.781169103000025 -46.453798934999952,169.794290188000105 -46.45212760499993,169.796703626000067 -46.451822670999945,169.799530434000076 -46.448179941999967,169.800691408000034 -46.446680426999933,169.811660900000106 -46.448546334999946,169.818544116000112 -46.449718330999985,169.811687747000065 -46.445472904999974,169.795473117000029 -46.435433369999942,169.795497619000116 -46.435344000999976,169.800786703000085 -46.414721364999934,169.785371377000047 -46.400290044999963,169.782456148000051 -46.397561012999972,169.782778111000084 -46.391038496999954,169.782817542000089 -46.390215844999943,169.78362242500009 -46.373875724999948,169.783734357000071 -46.37163714299993,169.784079116000044 -46.371110722999958,169.78463371700002 -46.370261324999944,169.78480783800012 -46.369995909999943,169.78496422000012 -46.369757026999935,169.791820519000112 -46.359254347999979,169.8414590000001 -46.328943443999947,169.891428656000016 -46.314977885999951,169.921077984000021 -46.299861194999949,169.936873471000013 -46.284371906999979,169.971701572000029 -46.272975544999952,170.001875064000046 -46.251245624999967,170.011678921000112 -46.237843385999952,170.042237336000085 -46.224520573999939,170.049792751000041 -46.219215327999962,170.051625088000037 -46.217928065999956,170.061000677000038 -46.211339058999954,170.061125020000077 -46.211252084999956,170.064919596000095 -46.208585859999971,170.078998918000025 -46.203194837999945,170.084725644000059 -46.201002470999981,170.117854675000103 -46.188303602999952,170.1554057190001 -46.159669614999984,170.170555708000052 -46.154783902999952,170.185923102000061 -46.132651190999979,170.182734008000011 -46.123125520999963,170.198211497000102 -46.102794117999963,170.201250733000052 -46.05202725099997,170.212458426000012 -46.050622876999967,170.244978237000055 -46.007439916999942,170.295152477000101 -45.963158871999951,170.314816793000091 -45.956053759999975,170.332603182000071 -45.94962377,170.335059152000099 -45.94783324399998,170.335399542000118 -45.947584289999952,170.335502927000107 -45.947510080999962,170.343967539000118 -45.941334428999937,170.393315818000019 -45.93139623299993,170.426289232000045 -45.929088626999942,170.43257716700009 -45.932679440999948,170.43606809400012 -45.926903921999951,170.475119307000114 -45.920585740999968,170.481781183000066 -45.919506173999935,170.497435612000118 -45.910847033999971,170.530657647000112 -45.908407391999958,170.536352998000098 -45.910931797999979,170.537568437000118 -45.908396280999966,170.53775935200008 -45.907995203999974,170.543384932000095 -45.911881287999961,170.603543737000109 -45.953417456999944,170.683582367000099 -46.00853477499993,170.59435325000004 -46.063536739999961,170.359132830000021 -46.207687280999949,170.334142861000032 -46.222928319999937,169.89735530400003 -46.487163550999981,169.757533515000091 -46.570875090999948,169.757452529000034 -46.57092242799996,169.752157214000022 -46.574083903999963,169.680228009000075 -46.616977384999984,169.612870080000107 -46.558486104999986,169.612929093000048 -46.555994017999978,169.618409885000119 -46.54780685299994,169.613529917000051 -46.54371318699998,169.613461456000095 -46.543657246999942,169.613228358000015 -46.543461640999965,169.613329131000114 -46.541753951999965,169.613601002000109 -46.541734581999947,169.653550996000035 -46.538762798999983,169.659131916000092 -46.529167829999949,169.698419694000108 -46.51962247199998,169.693575500000065 -46.509582687999966,169.704907529000025 -46.506886106999957,169.708793643000035 -46.505961470999978,169.70860803000005 -46.494401945999982,169.722310566000033 -46.490580190999935,169.703461933000085 -46.478498155999944,169.694836572000099 -46.484707621999974,169.689231760000098 -46.484549254999934,169.683334199000114 -46.484382557999936,169.676501102000088 -46.475038638999933,169.662645302000101 -46.469722005999984,169.680151145000082 -46.472136939999984,169.681597134000071 -46.473666712999943,169.686286191000022 -46.47861665399995,169.695386800000051 -46.475418673999968,169.696652278000101 -46.468701520999957,169.716535807000014 -46.474214376999953,169.719923759000039 -46.479410953999945,169.745990702000086 -46.475935899999968,169.749494651000077 -46.482935055999974,169.757234356000026 -46.478795423999941,169.759202766000044 -46.47774108599998,169.759363960000087 -46.477655396999978,169.757225210000115 -46.476414124999962,169.752846961000046 -46.473874723999984,169.756882701000109 -46.467983437999976,169.775729259000059 -46.468952515999945,169.780249971000103 -46.465927109999939,169.781036103000019 -46.455537275999973)) Author last name Last name of the Author Johnstone Project type Is it an MSc, PhD, BSc(Hons) or PGDipSci? MSc Advisers Who supervised/advised this student Landis, C.A. Norris, R.J. Abstract The Abstract for this thesis Structural geology within the first 12 km offshore of southeast Otago from Blackhead to Nugget Point, situated to the northwest of the Great South Basin, has been investigated using high resolution sub-bottom profiles and side-scan sonar images. The structures evident in the sub-bottom profiles and side-scan images can be related to those onshore and further offshore in multi-channel seismic profiles collected by Hunt International Petroleum Company (H.I.P.C.O.). The sediments can be correlated with known onshore stratigraphy and offshore well data. Onshore basement consists of Haast Schist in the north and Murihiku Supergroup in the south. Cretaceous and Tertiary sediments unconfomably overlie the basement. Taratu Formation extends throughout the area studied from just offshore from Brighton to the Clutha River. The Wangaloa Formation and Tertiary sediments are present overlying the Taratu Formation further offshore and south of the Clutha River. Cretaceous and Tertiary sediments are unconformibly overlain by post-glacial modern sand and relict gravels which are derived mainly from the Clutha River. Basement, Cretaceous, Tertiary and in some places the modern sediment are folded and faulted. The major structures trend at 040° to 055° between Blackhead and Mitchells Point where the major trend changes to 180°, although the Akatore Fault still trends northeast. From south of the Clutha River the trend of folding and faulting changes to 135° with the offshore extension of the Castle Hill Fault Zone which coincides with the northern limb of the Southland Syncline. Most faults within the study area are reverse, some with associated asymmetric synclines and anticlines. Northeast striking structures within 20km offshore are antithetic, southeast dipping, faults in the offshore extension of a previously described imbricate fault system through Central and Eastern Otago connected along a low angle decollement at mid-crustal depths. This fault system is associated with reverse faulting initiated in the Miocene in response to compression across the Alpine Fault. The Korora Dome and associated reverse faulting (part of the Waipounamou Fault System, a major set of northeast trending faults), situated 40km southeast of Nuggets Point, is thought to be the southeastern continuation of the Central and Eastern Otago fault system. The northwest trending structures are compressional features which have formed due to reactivation along pre-existing structures. The Akatore Fault and Fault B, trending parallel to and situated 2-3 km to the east of the Akatore Fault, are both active. The Akatore Fault can be traced from its termination at the Castle Hill Fault Zone northeastwards, trending at 040° to 055°, and continuing onshore south of the Tokomairiro River mouth, and then offshore south of Taieri Mouth and extending north on the landward side of Taieri Island and Green Island before its projected on-land continuation at Waldronville. Fault B lies on the seaward side of Green Island and Taieri Island and has only been traced offshore in the Taieri area. Fault B's anticipated onshore extension in the south is at Akatore Creek and to the north is on the northern side of Blackhead. Department The department where the student is studying primarily. Geology Named locality Named locality describing the field area location. Akatore-Kaitangata Basin Otago southeast Thesis description Number of pages, maps, CDs, etc. 119 p. : ill. (some col.), maps ; 31 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 1990Johnstone Creator An entity primarily responsible for making the resource Johnstone, Tanya, 1967- Date A point or period of time associated with an event in the lifecycle of the resource 1990 Title A name given to the resource High resolution seismic study of offshore southeast Otago Subject The topic of the resource Geophysics Structural geology Balclutha Nugget Point Nuggets offshore Otago Region seismic survey Structural geology Taieri https://theses.otagogeology.org.nz/files/original/6a013ddedf2506b142e196d6694d4abc.pdf f1936b18072fc9da199f80e801592f88 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 ((168.210901734000117 -44.444394540999951,168.186345674000108 -44.478613817999985,168.183640747000027 -44.482354082999962,168.177318849000017 -44.491152848999945,168.168264852000107 -44.503744242999971,168.152216186000032 -44.526046364999956,168.136500927000043 -44.547328584999946,168.131566101000089 -44.554011436999986,168.083250929000087 -44.551614631999939,168.075300778000042 -44.522771900999942,168.072558418000085 -44.511975507999978,168.062799976000065 -44.473529067999948,168.058864191000112 -44.458001790999958,168.056886551000048 -44.450194834999934,168.055371661000095 -44.44422439799996,168.053772563000052 -44.4379122199999,168.053538926000101 -44.436987070999976,168.053090328000053 -44.435214207999934,168.05216904800011 -44.43158178799996,168.051566690000072 -44.429207258999952,168.048412869000117 -44.416751417999933,168.047440245000075 -44.412913875999948,168.048567668000032 -44.412034022999933,168.060095808000028 -44.40303403799993,168.087048261000064 -44.381975211999929,168.095102367000095 -44.375680790999979,168.117800509000062 -44.357922028999951,168.121253452000019 -44.355220479999957,168.125834647000033 -44.351633827999933,168.131563566000068 -44.347149256999955,168.213373262000118 -44.342440177999947,168.214149070000076 -44.353001488999951,168.214807835000101 -44.361989386999937,168.219937462000075 -44.43179515199995,168.215564032000088 -44.437891356999955,168.213790234000044 -44.440363938999951,168.210901734000117 -44.444394540999951)) Author last name Last name of the Author Ballard Project type Is it an MSc, PhD, BSc(Hons) or PGDipSci? PhD Advisers Who supervised/advised this student Landis, C.A. Reay, A Abstract The Abstract for this thesis The Skippers Range in NW Otago is a structurally isolated block bounded by the Alpine Fault to the northwest, the Glade-Darran Fault to the west and the Hollyford Fault to the east. Within it are five intrusive and fault bounded units: The Mantle Volcanics Formation, Twin Lakes Trondhjemite, Skippers Formation, Slip Hill Intrusives and Mount Webb Gneiss. A small probably fault bounded conglomerate unit of unknown age occurs along the southwestern boundary of the Twin Lakes Trondhjemite. The Mantle Volcanics Formation is an undeformed, moderately southwest dipping > 1300 m sequence of Early Permian pyroclastic and epiclastic volcanogenic marine sediments extensively intruded by cogenetic basaltic dikes and sills. The sediments are predominantly coarse breccias and crystal lithic tuffaceous sandstones deposited by debris-flows and high-density turbidites on the flanks of an active and at least partially emergent volcanic edifice. A diverse fossil fauna from a new locality has been collected and includes the first reported occurrence of Eurydesmidae in New Zealand. The intrusive rocks span a continuous range from high MgO to high Al2O3 tholeiitic basalts, are characteristically clinopyroxene phyric often with crystals of quite large size and many can be classed as ankaramites. The intrusive suite is shown to be derived from high MgO, Cr and Ni primary parental melts which are represented in the dikes. These melts were emplaced into high crustal levels and erupted often with high crystal contents but without having undergone significant fractionation. The rocks of the Mantle Volcanics Formation have an incipiently developed greenschist facies mineral assemblage but have not fully equilibrated to these conditions. The Mantle Volcanics Formation represents a portion of the Brook Street Terrane, a north trending discontinuous belt of lower Permian island-arc derived volcanics and volcaniclastic sediments offset by the Alpine Fault, and a discussion of this entity is included. To the west of and separated from the Mantle Volcanics Formation by the Wilmot Fault and the Twin Lakes Trondhjemite pluton is the Skippers Formation with a structural thickness of approximately 2 km. This is composed of essentially three protolithic types: layered ultramafics, a crustal level basic dike/sill complex and highly deformed basaltic tuffaceous sediments. Taken together, these units represent scraps of dismembered island-arc basement possibly formed in a fore-arc setting. The whole of the Skippers Formation is characterised by well equilibrated greenschist facies and actinolite (after ?clinopyroxene) blastoporphyritic textures similar to clinopyroxene porphyritic textures in the Mantle Volcanics Formation are common in all three protoliths. Three tabular granitoid plutons, the Twin Lakes Trondhjemite between the Mantle Volcanics and Skippers Formations and two coterminous diorltic bodies, Slip Hill Diorite and Slip Hill Granodiorite, between the Skippers Formation and schists and gneisses of the Mount Webb Gneiss are exposed in the Range. The contacts of the Twin Lakes Trondhjemite are presently faulted but there is evidence of it being intrusive into the Mantle Volcanics Formation and Skippers Formation placing a relative age constraint on their juxtaposition. The Slip Hill Intrusives are fault bounded to the east with the Skippers Formation and the Slip Hill Diorite is shown to be intrusive into the earlier deformed Mount Webb Gneiss. The Slip Hill Diorite is very similar to the Mistake Diorite, which intrudes Brook Street Terrane rocks in the Eglinton Valley, in terms of age (Early Triassic) and petrography. The Mount Webb Gneiss was previously mapped and correlated with the Thurso Formation occurring along the coast of northern Fiordland. Some questions are raised as to the viability of this correlation. Department The department where the student is studying primarily. Geology Named locality Named locality describing the field area location. Skippers Range Otago northwest Thesis description Number of pages, maps, CDs, etc. 1 v. (various pagings), [18] leaves of plates : 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 1989Ballard Creator An entity primarily responsible for making the resource Ballard, Hyram R. (Hyram Riley), 1956- Date A point or period of time associated with an event in the lifecycle of the resource 1989 Title A name given to the resource Permian arc volcanism and aspects of the general geology of the Skippers Range, NW Otago Subject The topic of the resource Volcanology Permian geology Volcanology arc volcanism Brook Street Terrane Dunton Range Eglinton River Largs Terrane Skippers Formation Skippers Range Slip Hill Intrusives Southland Region Takitimu Group Takitimu Mountains https://theses.otagogeology.org.nz/files/original/0abfea8d7d3317b4fae9e8e72066ca27.pdf 32fa7a15a4c30e8633fc9e8beb8aabfc 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 ((170.665308537000101 -45.683852172999934,170.665301383000042 -45.684113036999975,170.665298874000086 -45.684256988999948,170.665296901000033 -45.684387451999953,170.586819777000073 -45.68282914699995,170.586825508000061 -45.682689754999956,170.586827357000061 -45.682644789999983,170.586841841000023 -45.682370567999953,170.586846463000029 -45.682258155999932,170.586861132000081 -45.681979436999939,170.586990485000115 -45.679223401999934,170.587400673000047 -45.670649709999964,170.588694916000122 -45.643597673999977,170.656388671000059 -45.644958828999961,170.666351184000064 -45.645153807999975,170.665697486000113 -45.66945506299993,170.665493987000104 -45.677083207999942,170.665426744000115 -45.679583928999932,170.665308537000101 -45.683852172999934)) Author last name Last name of the Author Reddy Project type Is it an MSc, PhD, BSc(Hons) or PGDipSci? BSc(Hons) Advisers Who supervised/advised this student Cooper, A.F. Abstract The Abstract for this thesis A suite of alkaline rocks, geochemically similar to those of the Dunedin Volcano are described and implications arising from their study are discussed. Rock types studied include basanites, basalts, hawaiites, benmoreites and trachyandesites. A summary of Benson's work on Landslide features in the Seacliff district is also included, with present day observations. Major and trace element whole rock analyses are presented. Three possible geochemical trends are suggested: Two sodic series : (a) basalt-hawaiite-(mugearite)-trachyandesite-benmoreite. (b) basanite-nepheline hawaiite-(nepheline mugearite)-nepheline benmoreite. A more potassic undersaturated series (c) basanite-nepheline hawaiite-nepheline trachyandesite-nepheline benmoreite. An electron microprobe study of the mineralogy of a trachyandesite from the pyroclastic breccia unit at Green Point, which contains an unnamed mineral, has been done. A detailed study of the Green Point to Brinns Point coastal section has been carried out and a possible eruption mechanism proposed. The rocks from the Seacliff area are geochemically similar to the more potassian members of the Dunedin Volcanic Complex. Department The department where the student is studying primarily. Geology Named locality Named locality describing the field area location. Seacliff Otago east Thesis description Number of pages, maps, CDs, etc. xii. 137 p. Diagms, photos, map (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 1986Reddy Creator An entity primarily responsible for making the resource Reddy, DP Date A point or period of time associated with an event in the lifecycle of the resource 1986 Title A name given to the resource A geochemical investigation of the alkalic rocks of the Seacliff district, East Otago, New Zealand. Subject The topic of the resource Map Geochemistry Igneous petrology basalt basanite benmoreite hawaiite trachyandesite