1 10 7 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/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 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 Smith Project type Is it an MSc, PhD, BSc(Hons) or PGDipSci? BSc(Hons) Named locality Named locality describing the field area location. Otago north 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 1986Smith Creator An entity primarily responsible for making the resource Smith, AK 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 Aspects of North Otago Geology. Subject The topic of the resource Map Mineralogy Igneous petrology Sedimentary petrology garnet kaersutite pillow lava pyroxene volatiles https://theses.otagogeology.org.nz/files/original/baa3cf504faba79633d157c69309d2fc.pdf cf1149265c9cd37c056812b5d728e767 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 (((170.530128882000099 -44.575959743999931,170.450169194000068 -44.549829536999937,170.451019386000098 -44.53381646899993,170.542506007000043 -44.560469833999946,170.54991662000009 -44.562624906999986,170.545426342000042 -44.580951723999931,170.530128882000099 -44.575959743999931)),((170.916995042000053 -44.734875362999958,170.934770160000085 -44.735068464999983,170.933680325000068 -44.760740305999946,170.916281232000074 -44.760409873999947,170.916995042000053 -44.734875362999958)),((170.631522583000105 -45.261412632999964,170.631611411000108 -45.258565412999985,170.632663371000035 -45.225289471999986,170.66872262600009 -45.231303577999938,170.681830123000054 -45.262400033999938,170.650422814000081 -45.261785055999951,170.631522583000105 -45.261412632999964))) Author last name Last name of the Author Pringle Project type Is it an MSc, PhD, BSc(Hons) or PGDipSci? PhD Advisers Who supervised/advised this student Reay, A. Abstract The Abstract for this thesis Field relations and petrography of low-grade metamorphosed basaltic rocks (metabasites) and associated lithologies from numerous localities in the Carboniferous to Jurassic Torlesse terrane and marginal Haast Schist terrane of North Otago and Canterbury are described. Pillowed and massive metabasites (spilitized basalt, dolerite, porphyrite, and rare gabbro) together with other lithologies of the volcanogenic association (limestone, chert, volcanic breccia, tuff and red and green argillite) and their metamorphosed equivalents are mapped as discrete metabasite units. The largest, the Dansey Metavolcanic Formation (North Otago) crops out for over 28 kilometres along strike and has a maximum thickness of 760 metres. Contacts between metabasites and greywackes are commonly unfaulted. Metagreywacke 'dykes', continuous and compositionally similar with underlying greywackes intrude basal pillowed feldspar metaporphyrite in the Waianakarua River metabasite unit. At some localities in North Canterbury, isolated outcrops of volcanogenic sequences are parts of melanges (e.g. Cheviot area and Esk Head melange) or blocks in tectonic slides (e.g. Cavendish Hills in North Canterbury). Major and/or trace element contents of 58 metabasites are presented together with data from Torlesse metabasites from Red Rock Point (Wellington) and Te Anau Assemblage metabasites from Taieri Reef (South Otago). 30 of the analysed samples are from the Dansey Metavolcanic Formation. Chemical analyses of zones in pillow structures and trace element comparisons between mineralogically different metamorphic vein-host rock pairs suggest that the elements: Ti, Zr, Y, Ni, and Pare relatively unaffected by secondary alteration. Discrimination plots incorporating the above, relatively 'immobile' elements [i.e. (Ti-Zr-Y), (Ti-Zr), (Ti-Zr/P2O5) and (Ni-Y)] indicate that the analysed metabasites include both tholeiitic and alkalic basalts. These diagrams also indicate that prior to secondary alteration, analysed Torlesse metabasites were compositionally similar to either: ocean-floor basalts, or basalts erupted within plates as seamounts or oceanic islands. Both types occur within the larger metabasite units. Diagrams incorporating relatively 'mobile' oxides and elements (e.g. normative diagrams, AFM, ACF diagrams and plots including the elements; Sr, Rb, and Ba) are of limited use in magma-type discrimination of the Torlesse metabasites. However, metabasites with tholeiitic basalt affinities generally contain higher Cu, lower Zn and less variable Pb contents than metabasites with alkalic basalt affinities. Also, Miyashiro plots (FeO*/MgO vs Ti0 2 and FeO*/MgO vs FeO*) of unpillowed, massive metabasalts and metadolerites corroborate magma-type conclusions from 'immobile' element data. High FeO*/MgO ratios of pillowed and sedimentary metabasites is attributable to more pronounced secondary alteration of these samples rather than to magmatic differentiation. Si02 , Na2O and K2O contents of samples with tholeiitic ocean floor basalt affinities indicate that these metabasites have undergone moderate amounts of pre-metamorphic weathering. Combined, pre-metamorphic weathering and metamorphism have resulted in 3.5- 4.0 wt % SiO2 loss and considerable mobilization of both Na2O and K2O for many analysed metabasites. 194 igneous clinopyroxene analyses, together with analyses of primary amphibole, plagioclase, Fe-Ti oxide, olivine and apatite from Torlesse metabasite units are presented. The relict phases indicate a spectrum of basalt compositions from alkalic to tholeiitic types. Titansalites in a metabasalt from the Lady Barker Range contain up to 7.15 wt % Ti02 and 10.21 wt % Al2O3 and are among the most Ti- and Al-rich terrestrial igneous clinopyroxenes recorded. Clinopyroxenes in another metabasalt from the same unit have variable Ca:Mg:Fe ratios which are similar to pyroxene trends in the classic tholeiitic Skaergaard Intrusion. Clinopyroxenes in metabasites from other Torlesse localities have compositions which are intermediate between these extremes. The spectrum of Ca:Mg:Fe ratios in clinopyroxenes from metabasites of the Dansey Metavolcanic Formation is closely comparable to that of oceanic island basalt suites (e.g. Hawaiian Islands). Relict clinopyroxene data from Taieri Reef, South Otago (Te Anau Assemblage) are similar to average values of clinopyroxenes from island arc basalts. For most metabasites the magmatic affinities indicated by both whole rock geochemistry and clinopyroxene data are in agreement. Sector zoned clinopyroxenes, however, give ambiguous results on conventional discrimination diagrams. Combined, the data indicate that the ratio of alkalic to tholeiitic metabasites in metabasite units within Carboniferous and Atomodesma fossil zones is lower than in Triassic fossil zones. Also, the basal portions of the Lady Barker Range metabasite unit and the Dansey Metavolcanic Formation are dominated by tholeiitic metabasites. These units are capped by metabasites with alkalic affinities. These relationships, together with the lithological content of many of the units, conform with recent models of the structure and evolution of small, isolated, oceanic volcanoes which grew in areas of rapid sediment accumulation. The metamorphic transition from pumpellyite-actinolite facies to chlorite zone greenschist facies for metabasite lithologies was studied in the Dansey Metavolcanic Formation (North Otago). Analyses of 37 pumpellyites, 63 actinolitic amphiboles, 25 riebeckite-arfvedsonites and riebeckitic actinolites, 81 chlorites, 96 epidotes and numerous analyses of sphene, phengite, stilpnomelane, albite and hematite are discussed in terms of host rock composition and textures and metamorphic mineral assemblage. Pumpellyites include Fe-, Al- and Mg-rich varieties. On thin section scale pumpellyite compositions are remarkably heterogeneous. Iron-rich epidote is an ubiquitous phase in metabasites. Compositions of Ps25-36 are common, although in some rocks iron-rich epidote cores are rimmed by iron-poor epidote (Ps16-21). Epidote and pumpellyite heterogeneity reflect a variety of pumpellyite-consuming, epidote producing reactions within different microdomains of the same rock. Mg:Fe ratios of colourless-pale green actinolite vary sympathetically with those of coexisting chlorite. However, within a single thin section, actinolites with a single cleavage parallel to rock foliation have higher. Mg:Fe ratios and SiO2 and CaO contents and lower Al2O3 , Ti02 and MnO contents than actinolites with two [110] cleavages. The differences suggest that the former were formed at slightly higher metamorphic grade. Blue amphiboles are minor phases in several metabasites. They are invariably mantled by actinolite and are considered to have formed during a pre-metamorphic episode of submarine alteration. Chlorites are predominantly ripidolites and brunsvigites. Some contain significant MnO (up to 4.32 wt %) and Cr2O3 (up to 2.42 wt %). Stilpnomelanes include Mn-, Fe 3+- and Fe 2+-rich varieties. Comparison with compositions of the phase in other metamorphic terranes indicates that Al/[Fe + Mg + Mn] ratios increase with increasing metamorphic grade. Primary Fe-Ti oxides in some Dansey Pass metabasites have been altered to pseudobrookite-hematite assemblages and later to sphene (± hematite) pseudoroorphs. The disappearance of relict clinopyroxene in massive metabasites approximately corresponds with the pumpellyite-clinozoisite isograd for metagreywacke lithologies. However, metamorphic mineral transitions between the pumpellyite-actinolite and the chlorite zone greenschist facies are less sharply defined in metabasites than in metagreywackes. Rather, metabasite metamorphic mineral assemblages are closely related to host rock textures. Pillowed and sedimentary metabasites are dominated by chlorite-epidote-actinolite assemblages whereas massive metabasites (flows or conformable sills) are less permeable to metamorphic solutions and commonly contain pumpellyite-bearing assemblages. In southern New Zealand, minerals of the axinite group are widespread in vein assemblages in regionally metamorphosed rocks of the prehnite-pumpellyite, pumpellyite-actinolite and chlorite zone greenschist facies. Fe, Mg-axinites, approaching endmember ferroaxinite in composition, along with quartz and often prehnite, pumpellyite, iron-rich epidote and chlorite fill veins in spilitized volcanic and greywacke lithologies. Tinzenite and more commonly manganaxinites occur in quartz veins in nearby ferruginous and manganiferous cherts. Average and representative analyses of seventeen vein axinites are presented as well as analyses of four porphyroblastic ferroan manganaxinites which occur as rock-forming minerals at widely separated localities. Compositional variability in published axinite analyses along with those of this study can be attributed partly to formation temperatures. A low temperature miscibility gap may exist in the axinite group. Tinzenite or manganaxinite and ferroaxinite are stable in low-grade metamorphic rocks of appropriate compositions, whereas ferroan manganaxinites and manganoan ferroaxinites occur in some pegmatites, skarns and regionally metamorphosed rocks which equilibrated at more elevated temperatures. Analyses of tourmaline intermediate in composition between end-members dravite and schorl are presented for five rocks from the Dansey Metavolcanic Formation. Compositions of the mineral in regionally metamorphosed rocks appears to be more influenced by bulk rock composition than by metamorphic grade. For a wide range of bulk compositions in biotite and garnet zone greenschist facies and amphibolite facies rocks of southern New Zealand, tourmaline is the only observed borosilicate phase. At metamorphic conditions typical of these grades, axinite minerals would be restricted to relatively Ca-rich lithologies by a reaction of the form: 3 ferroaxinite + 5 chlorite + 2 albite + 5 quartz = 2 tourmaline + 4 epidote + 2 actinolite + 5 water. Department The department where the student is studying primarily. Geology Named locality Named locality describing the field area location. Otago north Canterbury Thesis description Number of pages, maps, CDs, etc. 440 p. : 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 1980Pringle Creator An entity primarily responsible for making the resource Pringle, Ian James. Date A point or period of time associated with an event in the lifecycle of the resource 1980 Title A name given to the resource Petrology, geochemistry and igneous and metamorphic mineralogy of low-grade metamorphosed basalts of the Torlesse terrane, South Island, New Zealand. Subject The topic of the resource Map Geochemistry Mineralogy Metamorphic geology Mesozoic axinite greenschist metabasite pyroxene Torlesse Supergroup https://theses.otagogeology.org.nz/files/original/5ea2dd9a1d289f6916dc2852d784e131.pdf 26301cdfcafc9da8eba2a8b71fa6177e 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 ((170.367115240000089 -44.701216147999958,170.3717349530001 -44.713340813999935,170.371560619000093 -44.7196216899999,170.37152122800012 -44.721079451999969,170.371193667000057 -44.733020377999935,170.371190275000117 -44.733096835999959,170.370833066000046 -44.746059014999958,170.370274747000053 -44.766323322999938,170.231722366000099 -44.763630177999971,170.231249769000101 -44.763330808999967,170.181107609000037 -44.731359544999975,170.180647724000096 -44.731069263999984,170.011278615000037 -44.620779906999985,170.010891045000108 -44.620526775999963,170.012058319000062 -44.597831035999945,170.01245196800005 -44.59021334199997,170.013263241000118 -44.574433699999986,170.051219320000087 -44.570744289999936,170.08702177400005 -44.567253986999958,170.097224005000044 -44.566257895999968,170.140695973000106 -44.5822002699999,170.166580760000102 -44.591677850999986,170.178072264000093 -44.595883834999938,170.182977836000077 -44.597677843999975,170.203916553000113 -44.605333603999952,170.227977937000105 -44.614126959999965,170.23620199800007 -44.617141290999939,170.300628977000088 -44.640733886999953,170.302055533000043 -44.641257718999952,170.329489930000022 -44.663181296999937,170.357380513000066 -44.685450170999957,170.365829093000116 -44.697842068999933,170.367115240000089 -44.701216147999958)) Author last name Last name of the Author Ryburn Project type Is it an MSc, PhD, BSc(Hons) or PGDipSci? MSc Advisers Who supervised/advised this student Campbell, J.D. Abstract The Abstract for this thesis Marine fossils of Kaihikuan age (Middle Triassic) are known from two discrete areas within Torlesse Supergroup "greywackes" to the south-west of the Middle Waitaki Valley. At Corbies Creek, five moles west of Otematata, fossils are abundant in a sequence of indurated, shallow marine sandstones and siltstones that resemble the Murihiku Supergroup rocks in facies, but are of the arkosic mineralogy characteristic of the Torlesse Supergroup. The 4000 ft thick sequence has been divided into the following formations (in ascending order): Rabbiters Hut Sandstone (790 ft), Elderberry Formation (530 ft), Taylor Siltstone (185 ft). Charlie Free Sandstone (305 ft), Matagouri Siltstone (830 ft), Putakitaki Sandstone (305 ft), Umu Siltstone (145 ft), One O'Clock Formation (750 ft), and Long Gully Formation (250+ ft). The Corbies Creek Group is proposed for these rocks. A rich Kaihikuan fauna, including many new species is unevenly distributed throughout the lower 3500 ft, plant fossils appearing in the uppermost 250 ft. The apparently conformable relationship of fossil flora to fossil fauna would indicate an upper Kaihikuan or Lower Oretian age for the plant fossils, this being at variance with the tentative uppermost Triassic or Lowest Jurassic date suggested by palaeobotanical correlations. Corbies Creek Group rocks occupy a downfaulted strip extending from the Otematata River, nine miles in the Corbies Creek-Backyards area. The strip is faulted against Chlorite 2 surface semischists to the south-west and against unfossiliferous, deep-water greywackes to the north-east. Sediments within the strip are semi-isoclinally folded about axes that plunge moderately towards the southwest. In the St. Mary Range, eight miles west of Kurow, Kaihikuan fossils occur in a largely overturned sequence of similar, but incipiently schistose sediments. A sequence of 3000 ft has been divided into 6 informal units - labelled M1 to M6. Although diagnostic Kaihikuan fossils are restricted to the upper 1200 ft, populous shellbeds of the trigoniid Agonisca are found throughout the full sequence, and define a zone extending north-west - south-east got at least 7 miles. These rocks are isoclinally folded about an anticlinal axis plunging gently north-west. Fossils are compressed perpendicular to cleavage. Massive unfossiliferous greywackes, adjacent to and between the two areas of fossiliferous shelf sediments, would seem to have been deposited in deep water as they are intimately associated with undoubted turbidites. Reconnaissance structural observations would suggest that they are complexly folded about steeply plunging axes. Department The department where the student is studying primarily. Geology Named locality Named locality describing the field area location. Corbies Creek Mt St Mary Otago north Thesis description Number of pages, maps, CDs, etc. 100 leaves : illus., diagrs., maps (fold. in pocket) ; 27 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 1967Ryburn Creator An entity primarily responsible for making the resource Ryburn, Roderick James. Date A point or period of time associated with an event in the lifecycle of the resource 1967 Title A name given to the resource Kaihikuan rocks at Corbies Creek and Mt. St. Mary, North Otago Subject The topic of the resource Map Paleontology Sedimentary petrology Structural geology Mesozoic Agnosica Kaihikuan Stage Torlesse Supergroup https://theses.otagogeology.org.nz/files/original/e36e9624151ae215aa7b91319293bb7e.pdf 71998ea20755e6f98f22a6a802bf437a 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 ((170.117446650668654 -44.600447943823497,170.117486953121954 -44.586157628599473,170.160538244425169 -44.578185751134484,170.170100603576685 -44.532214366775875,170.197188330471164 -44.522878812321416,170.289583906610602 -44.569414025336194,170.250309026209777 -44.610872237134764,170.260586681834724 -44.619217815328668,170.242736258554032 -44.64403587132621,170.117446650668654 -44.600447943823497)) Author last name Last name of the Author Shu Project type Is it an MSc, PhD, BSc(Hons) or PGDipSci? BSc(Hons) Advisers Who supervised/advised this student Coombs, D.S. Abstract The Abstract for this thesis INTRODUCTION The area investigated lies within Benmore and Hewlings Survey Districts of Otago and Canterbury respectively; covering approximately the southern end of the Waitaki Gorge. The area consists of a one and a half mile strip on either side of the Waitaki River with Black Jacks Point as the northern boundary and the main road through Otematata as the southern boundary. Basement rocks or metagreywackes of this area are part of the Torlesse Group of the Alpine Facies. It is known to be structurally very complex and lies within the prehnite and pumpellyite metagreywacke facies. The construction of Benmore Dam has resulted in numerous road-cuts and excellent exposures around the dam site. In view of these advantages and the eventual loss of many outcrops beneath the future Lake Benmore, this project was initiated in an endeavour to elucidate the possible structure and to establish a general picture of the tectonic history. The term "argillite" in the following pages is used to denote fine grained rocks including siltstone, mudstone and ash bed; while lithic, tuffaceous and micaceous sandstone and arkose are covered by the term "greywacke". Aerial photographic coverage of the area is given by run 2726, photographs 14 17 and run 2725, photographs 16 - 18. Department The department where the student is studying primarily. Geology Named locality Named locality describing the field area location. Benmore Dam Otago north Thesis description Number of pages, maps, CDs, etc. 62 leaves, photos, Map (folded in pocket); 27 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 1964Shu Creator An entity primarily responsible for making the resource Shu, YK Date A point or period of time associated with an event in the lifecycle of the resource 1964 Title A name given to the resource Greywacke Structure and Petrography around Benmore Dam, North Otago. Subject The topic of the resource Map Sedimentary petrology Structural geology coral fossil fusulinid foraminifera prehnite-pumpellyite Torlesse Supergroup https://theses.otagogeology.org.nz/files/original/2acee1e2ef8973558efdd22c9ee61e0e.pdf 23930409359375b5f6d3706d82deaa27 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 ((170.227976466000086 -44.614158441999962,170.235481647000029 -44.616908047999971,170.300628977000088 -44.640733886999953,170.302055533000043 -44.641257718999952,170.329489930000022 -44.663181296999937,170.357380513000066 -44.685450170999957,170.365829093000116 -44.697842068999933,170.367115240000089 -44.701216147999958,170.3717349530001 -44.713340813999935,170.371560619000093 -44.7196216899999,170.37152122800012 -44.721079451999969,170.371193667000057 -44.733020377999935,170.371190275000117 -44.733096835999959,170.370833066000046 -44.746059014999958,170.370274747000053 -44.766323322999938,170.231722366000099 -44.763630177999971,170.231249769000101 -44.763330808999967,170.182843634000051 -44.731379043999937,170.182399727000075 -44.731084654999961,170.146386634000123 -44.707996932999947,170.012058319000062 -44.597831035999945,170.011967538000022 -44.597756652999976,170.002768160000073 -44.589873528999931,170.001705176000087 -44.588963499999977,170.003805001000046 -44.561959933999958,170.026097023000034 -44.56254271399996,170.087135314000079 -44.564109433999931,170.134899980000114 -44.565312124999934,170.18367937700009 -44.56651943199995,170.217959510000014 -44.567354888999944,170.230148658000076 -44.567650770999933,170.230080440000052 -44.569112434999965,170.230076661000112 -44.569193387999974,170.229802283000026 -44.575071521999973,170.229500341000062 -44.581538810999973,170.228890802000024 -44.594590296999968,170.228395141000078 -44.605199652999943,170.228320536000069 -44.606796225999972,170.22827829400012 -44.607700199999954,170.228203263000069 -44.609305766999967,170.228201582000111 -44.609341745999984,170.228120662000038 -44.61107323799996,170.228054451000048 -44.61248991399998,170.227977937000105 -44.614126959999965,170.227976466000086 -44.614158441999962)) Author last name Last name of the Author Ryburn Project type Is it an MSc, PhD, BSc(Hons) or PGDipSci? BSc(Hons) Advisers Who supervised/advised this student Campbell, J.D. Abstract The Abstract for this thesis INTORDUCTION The Triassic f o ssi l loc a lity a t Corbie s Creek, North Otago was discovered i n 1958 by E . 8 . Gair and D. R. Gregg of the New Zeal an.d U·eological Survey. , 'l'his wa s recollect ed later in 1958 and a paper by Gair, Gregg and Speeden desm:i bing t he occurrence was published in 1962. The primary aim of this investi gation was to map the fossil locality tog ether with any extension of' the f ossili ferous horizon that might exist. Prom t his it was hoped that stratigraphy, structure and relationship with surrounding lithologies mi ght be elucidated. Field Work, Dat es and Procedure. F ield work was started on the 3rd of December 1963, twelve da~,rs ·being s pent on a geological traverse t hrough the ori ginal :fos sil locality and on reconnaisance of t he surrm_m ding rocks. Nurner ous :fossil localities were d:LscovePed over• an area of sevePal square miles. A brief / I - 2 - visit with Prof essor · Coombs on the 20th and 21st of December was followed by ·16 days in the area starting :from the 1st of J·anuary, '196L+. This period was s pent in est ablishing , measuring and extending ma ppable units within t he fossiliferous sediments, particularly in the area several miles south-ea st of the Corbies . Creek locality. Fossil collections were made over much of this area. Mr J.D. Campbell accompanied the writer on a three day v:Lsit towards the end of F ebruary. Starting on February the 29th, three days were spent in the area immediately to the south and south-east of the ori ginal Corbies Creek locality and a fourth on the north-west side of the Otrunatapio River. Possils found there served to esta.blish the nol~th-west con tinuation of the Triassic sediments. Work was continued in the Ntay vacation from the 20th to the 31st, mainly on extending the mapping as far as the Otematata River. Several days were used in attempting to correlate the area containing the Corbies Creek locality with the separate fossiliferous area to the south-east . Assistance was given to Professor J .· B~ .'_Mackie and party in establishing grolmd control points on the first weekend of Au gust. In the field, mapping was drawn directly on to the air-photos. Sections were measured with a tape compass and clinometer. - 3 - .Aclmowledgements:- 'rhe project was supervised by Mr J .• D. Camp bell to whom I am indebt ed f' o:e assistance and direction, particularly in :fossil identifications. I a~ grateful to Prof'essor Coombs :for suggestions and guida.YJ.ce in :fieldwork, and to Professor Maclde, O.A. Evans and C. ', . Garlick of the Surveying Department :for the f' irst class base map prepared f'rom air-photos. In :formation on surr01mding geology was obtained from Ivlr A.R. L1utch of the Geological Survey and :from :fellow student Y. K. Shu. I am indebted to Messrs W. P . and J.B. C~neron of Otematata Station and particularly to Mr and Mrs 'l'aylor of the Backyal"ds Homestead, Otematata Station :for their generous hospitality. Ge ographic Setting:- 'rhe position and exten t of' the ar•ea mapped is shown on the map of' the Otematata Region. A prominent fault angle depression trending northwest, south-east between the Otamatapio River and Otematata River provides the natuEal axis to the area studied ( see F i gure 1). Boundaries are provided by the two rivers mentioned above and by the crestal ridge of Middle Range to - LJ. - the north-east. 1\ line rou ghly pal'allel to Mi ddle Range 3 miles to t he soutb-west def'ines the r•emaining boundary. Tot a l area is appr•oxi::nt'l. tely 20 square miles. •rop ograJ2h.Y and Drainage:- •'rom the base of' the scarp f'orming the south-west f'ace of' Iii i ddle Range an extensive diss ected surf'ace slopes u p to the crest o:f HawkduJl Hange some 9 miles south-west. This is drained by both the Otematata and Otamatapio Rivers. The south-east third of' the area is drained by a series of' deeply incised gullies of' which Long Gully is promi n ent. These converge on the Otematata River just above the point where it cuts through Middle Range in a r et1!DI'kable meandering g oPge. 'l'he north-west t vvo-thirds is drained ma inly by Corbies Creek and tributaries. 'l'his stream is lmovm locally as tl i dclle Stream whj.le the name Glen Bouie Creek appears to apply to its upper rea ches. A larg e expanse of all1.1.v:Lal f'lood-plain and ter races between t he Otamat apio and Corbies Creel<:. will be referred t o as CoPbies Cr eek Basin. Back;yards Basin is the name given to the much smaller area of alluvium and outwash f'ans between the Backyards IIomest ead and the base of' / I - 5 - Middle Range near' the centre of the area. The low hillocky ground between the two, roughly square in plan, is called Rabbiter' s IIut Block. South-east of Backyards Basin the name Long Gully Blocl;: is intended to refer to the strip rmder'lain by fossiliferous Triassic rocl<:: s that extend as far as the Ote~ nata ta River . Culture; Vegetation and Outcrop. Acces s to the l:3ackyards Homest ead is via a pr ivate road from a gate on the Ote:natata - Omarama road about a mile beyond .Ahuriri Pass. Alternatively a rough venicle tr a ck leads directly across Middle Range f'rom tDtematata Station Homestead near Otematata t ownship. Another vehicle trEtck winds down Long G ull ~r to the Otematata River which it follows for ten miles upstream . within Ot ematata Station. 'l'he area lies wholly Ground cove1, in the lower parts tend s to be rather sparse, consisting ma inly of sorrel and scabweed with some scat t ered tussock. Some areas, particul arl y in Rabbitel,, s Hut Block, are almost devoid of vegetat ion, this being undoubtedly due to the infestation of rabbits. Hi gher ground is clothed in tussock while gulleys and sunny steep slopes are often choked with matEtgouri and sweet briar. Isolated and clumped willows are present in some wat er cmJ.r ses. / - 6 - Rainfall is reported to be 1211 a year. Outcrop is gen erally alnmdant particularly in Rahbi t er ' s Hut Block; but tends to be r'a t her low and broken there. In Long Gully Block outcrop is often rarer.1..'b1..lt better exposed due to grea t er relief'. / Department The department where the student is studying primarily. Geology Named locality Named locality describing the field area location. Otematata River Otamatapaio River Otago north Thesis description Number of pages, maps, CDs, etc. 70 leaves. Ill, photos, diagms, 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 1964Ryburn Creator An entity primarily responsible for making the resource Ryburn, RJ Date A point or period of time associated with an event in the lifecycle of the resource 1964 Title A name given to the resource A strip of Kaihikuan Sediments between the Otematata and Otamatapio Rivers, North Otago. Subject The topic of the resource Map Metamorphic geology Paleontology Sedimentary geology Structural geology Corbies Creek Group Kaihikuan Stage