1 10 7 https://theses.otagogeology.org.nz/files/original/2dfa7e595029f67686919f8a5ede52b8.pdf 13c7563c939e86092da466fd32b633ee 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 ((169.947049440000114 -44.899626353999963,169.936532420000049 -44.899391118999972,169.936364764000018 -44.899386714999935,169.936339457000031 -44.899386049999976,169.918590080000058 -44.898981464999963,169.916660013000069 -44.898939453999958,169.917526790000124 -44.875048032999985,169.918188142000076 -44.856950715999972,169.937912191000123 -44.839441535999981,169.937985213000047 -44.839375912999969,169.93806139600008 -44.839310373999979,169.952858350000042 -44.826743870999962,169.998204750000014 -44.828002122999976,169.998343768000041 -44.828005703999963,170.012746653000022 -44.828402830999948,170.011156173000018 -44.859371636999981,170.009444776000123 -44.892692030999967,170.009019805000094 -44.901006412999948,169.983293048000064 -44.900434162999943,169.947049440000114 -44.899626353999963)) Author last name Last name of the Author Ulrich Project type Is it an MSc, PhD, BSc(Hons) or PGDipSci? BSc(Hons) Advisers Who supervised/advised this student Norris, R.J. Abstract The Abstract for this thesis The Torlesse basement predominantly consists of arkosic sandstone and argillite with minor conglomerate beds, typical of a clastic turbidite sequence. The sandstones are relatively immature. Modal analysis of the sandstones gave an average Q:F:L ratio of 33:50:17, Lv /L ratio of 0.83 and P /F ratio of 0.74. Correlation of these characteristics with previous work give~ a Triassic age. Pebble-sized clasts from a Torlesse conglomerate consist of: sedimentary clasts (50%), mainly autocannibalised older Torlesse-like rocks, with some quartz rich sandstones; volcanic clasts (11 %), mainly rhyolite and dacite with rare basic/intermediate clasts; metamorphic clasts (8%), mainly metasedimentary clasts and some high grade gneisses/ cataclastic granitoids; quartzose clasts (11 %); chert (13%), some containing radiolarians; and plutonic clasts(7%) mainly granite. Provenance information gained from sandstone and conglomerate analysis indicate a continental arc setting with some older plutonic roots exposed, associated with the autocannibalistic reworking of older Torlesse-like sediments, which have been uplifted and eroded following metamorphism to prehnite-pumpellyite fades. The Manuherikia Group sediments of Early Miocene age were deposited unconformably upon the peneplained surface of the Torlesse basement in a braided river and lacustrine environment. They consist of quartz pebble conglomerate, quartz sands and muds, and carbonaceous shales and !ignites. Measured sections in and along the Hawkdun Range are used to demonstrate the structure and deformation of the range. The deformation along the Hawkdun Range front occurs as a zone of distributed deformation upon numerous small faults, most less than 1metre wide. The movement on these faults is predominantly thrust to WSW with associated en-echelon strike-slip movement on approximately N-S striking faults. The faults are orientated similarly to the bedding within the Torlesse basement and are probably controlled by the bedding. Home Hills is characterised by an asymmetric anticline trending NE. Two models are proposed to model its formation. Evidence for recent growth of the anticline to the NE come from air gaps of abandoned streams upon the slopes of Home Hills. Uplift of the Hawkdun Ranges and the growth of Home Hills have formed an asymmetric basin between them where Manuherikia Group sediments are preserved. Department The department where the student is studying primarily. Geology Named locality Named locality describing the field area location. Home Hills Hawkdun Range Thesis description Number of pages, maps, CDs, etc. vi, 69 p. : ill. (some col.), maps (some col.) ; 30 cm. Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Identifier An unambiguous reference to the resource within a given context 1994Ulrich Creator An entity primarily responsible for making the resource Ulrich, Samuel H. (Samuel Hamish) Date A point or period of time associated with an event in the lifecycle of the resource 1994 Title A name given to the resource Provenance study and structural aspects of the Hawkdun Range, Home Hills area Subject The topic of the resource Structural geology Sedimentology Manuherikia Formation Mt Ida provenance studies Southland Region Torlesse Supergroup https://theses.otagogeology.org.nz/files/original/0ff4e90adc2f6fcd3c9c773fc6263da4.pdf 5ffa0e46f9e022501daa032e99f34429 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 ((168.324185158000091 -46.590544009999974,168.324049425000112 -46.592147125999986,168.323314835000019 -46.600719178999952,168.318124152000109 -46.600528732999976,168.315823832000092 -46.600442774999976,168.311861722000117 -46.60029586,168.270814986000119 -46.598762532999956,168.272078617000034 -46.584858797999971,168.273326607000058 -46.571134626999935,168.273585456000092 -46.568270304999942,168.273651605000055 -46.567556534999937,168.274153460000093 -46.562016493999977,168.274390102000098 -46.559417117999942,168.276695517000121 -46.559499676999963,168.29353061200004 -46.560099362999949,168.300554472000044 -46.560349990999953,168.304371169000092 -46.560482666999974,168.326681021000013 -46.561270885999932,168.324483232000034 -46.58705497699998,168.324475441000118 -46.587149285999942,168.324395751000111 -46.588074279999944,168.324389444000076 -46.588150624999969,168.32437311800004 -46.588348223999958,168.324185158000091 -46.590544009999974)) Author last name Last name of the Author Elder Project type Is it an MSc, PhD, BSc(Hons) or PGDipSci? BSc(Hons) Advisers Who supervised/advised this student Reay, A. Abstract The Abstract for this thesis In the Bluff area lower green schist facies Greenhills Group rocks of the Brook Street terrane derived from a Permian volcanic arc have been intruded ~ by igneous bodies inducing contact metamorphism. Facies of contact metamorphism are observed as pyroxene hornfels facies in assimilated xenoliths in a hybrid rock zone, further out from the intrusions hornblende hornfels are observed. At a distance of 800 m from the intrusive contacts albite-epidote facies of contact metamorphism are observed in metabasaltic dykes. Evidence for this facies comes from the mineral assemblages in the metabasalt dykes which have cut vertically through Greenhills Group metasediments very soon after the tilting of the Greenhills Group bedding associated with the intrusion of the large igneous bodies. The intrusive bodies are the Flat Hill gabbronorite and the Ocean Beach diorite which show a distinct difference in the bulk rock chemistry with the diorite appearing as a· more evolved rock. Dyke intrusion of microgabbro, quartz diorite and hornblende pegmatite is part of late stage activity associated with the cooling of the large igneous~ bodies. Granitic dykes present post date the intrusion of the large igneous bodies and the late stage dyke activity. The age of the Flat Hill gabbronorite is given as 265 M a, the oldest recorded rocks of the Brook Street terrane. - --l J Department The department where the student is studying primarily. Geology Named locality Named locality describing the field area location. Flat Hill Bluff Peninsula Thesis description Number of pages, maps, CDs, etc. 71 p. : ill. (some col.), maps (some col.) ; 30 cm. Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Identifier An unambiguous reference to the resource within a given context 1994Elder Creator An entity primarily responsible for making the resource Elder, Damon Jon. Date A point or period of time associated with an event in the lifecycle of the resource 1994 Title A name given to the resource Geology of Flat Hill-Ocean Beach, Bluff Peninsula Subject The topic of the resource Areal geology Bluff Peninsula Brook Street plutonics Southland Region https://theses.otagogeology.org.nz/files/original/8b2fee28fb2585c9e563ab97277711c6.pdf 7ed6c0ba645865a628990ac204376ae0 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 ((167.876165442397649 -45.805653849545209,167.908046177242369 -45.807082821399653,167.909706588654842 -45.792628652149119,167.922995806352816 -45.792506964821527,167.925539165184517 -45.779520917818473,167.942850608540908 -45.780052283829924,167.939018425908614 -45.837280943307064,167.926165818205277 -45.83623312994002,167.925899904097207 -45.842890025314702,167.873318556190412 -45.840298605939537,167.876165442397649 -45.805653849545209)) Author last name Last name of the Author MacCulloch Project type Is it an MSc, PhD, BSc(Hons) or PGDipSci? BSc(Hons) Advisers Who supervised/advised this student Landis, C.A. Abstract The Abstract for this thesis An area approximately 31 hm2, centered around Nugget }fill in western Southland was mapped in detail. The geology in this area is dominated by Takitimu Group lithologies which are intruded by the White Hill Intrusive Suite. To the northeast of Nugget Hill, Barretts Formation unconformably overlies Takitimu Group and the White Hill Intrusive rocks. The Barretts Formation has been overthrust by the Murihiku Supergroup along the Letham Ridge Thrust. A sli-v-er of Wairahi Melange occurs between the Barretts Formation and the Murihihu Supergroup. The Tahitimu Group consists of volcanic and volcaniclastic lithologies which were deposited in sedimentary basins flanhing the volcanoes of an island arc system. The Group in the Nugget Hill area is divided in to two formations, the Heartbreah Formation consisting primarily of volcanic rochs with rare volcaniclastic material and the MacLean Peahs Formation which is dominated by intercalated volcaniclastic rudites, arenites and lutites with the occasional flow of basalt and basaltic-andesite lavas. The White Hill Intrusive Suite includes gabbros and microgabbros of very similar compositions to the Tahitimu Group. Barretts Formation conglomerates and sandstones contain exotic clasts with respect to the Tahitimu Group. These include granites, siliceous volcanics and ignimbrite. A newly recognised southeastward plunging asymmetrical anticline has deformed the Tahitimu Group in the region. The Telford Fault which strihes approximately north-west separates approximately east-west strihing, south facing units from north-west striking, east facing units of the Tahitimu Group. <U<JplOuiA'IIlY\.-1 ~~~. About 1 km of -eflf;e.t is inferred at the south end and about 7 hm of is inferred at the north end of the fault. Southeast of Nugget Hill a southeastward dipping thrust fault is mapped and an oblique fault is mapped down the Wairahi River south of the Telford Burn confluence. These are splayed faults which accommodate offset at the southern end of the Telford Fault. Department The department where the student is studying primarily. Geology Named locality Named locality describing the field area location. Nugget Hill Thesis description Number of pages, maps, CDs, etc. vii, 141 (i.e. 142) leaves : 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 1992MacCulloch Creator An entity primarily responsible for making the resource MacCulloch, Samantha, 1970- 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 Geology of Takitimu group rocks in the Nugget Hill region, western Southland, New Zealand Subject The topic of the resource Sedimentology Nuggett Hill Southland Region Takitimu Group Wairaki Hills Wairaki Melange Wairaki River White Hill Intrusive Suite https://theses.otagogeology.org.nz/files/original/6e7b0fc3294541f7fdb478c4f60779eb.pdf 0e07a9c560d9a84282b520012aa30025 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 ((168.870616252290489 -46.040436426490992,168.872892415671714 -46.019084795228437,168.945062277374973 -46.051203633854492,168.937351186368858 -46.072363209696832,168.870616252290489 -46.040436426490992)) Author last name Last name of the Author Wright 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 Fossiliferous strata of the Murihiku Supergroup crop out in the Otamita Downs area, eastern Hokonui Hills, Southland, New Zealand. Detailed biostratigraphic subdivision indicates that this is the thinnest sequence of Triassic rocks yet mapped in the Hokonui Hills. This probably reflects a depositional setting distal from the volcanogenic source. At least three species of Rastelligera coexisted in the uppermost Triassic (Otapirian). The Otapirian (Triassic)-Aratauran (Jurassic) boundary, although not marked by any lithological change, is a pronounced biostratigraphic hiatus indicated by the extinction of Rastelligera and Clavigera .. The Jurassic Spiriferina ongleyi is placed in the genus Mentzelia thus M. kawhiana-M. ongleyi is the only Spiriferinid lineage to survive the boundary. Well preserved ammonite specimens from middle Aratauran beds are identified as Saxoceras sp. Extreme ribbing variation in Otapiria marshalli questions existing species designations. The Jurassic sediments host minor volumes of pebble conglomerate, and the uppermost Triassic Otamita Downs Boulder Conglomerate contains clasts up to 3.5 m in diameter. Clast composition in this unit varies widely and does not mirror the finer grained volcanogenic sediments. Common lithologies include granophyres, tonalites, undeformed greenschist fades volcaniclastics, and amphibolite fades metabasalts, some of arc ankaramite affinity. A common source is proposed for these clasts Rare clasts from the pebble conglomerates include metasedimentary quartzose schists with a complex structural history. The method of deposition of the boulders within the Otamita Downs Boulder Conglomerate is unclear; however the large size suggests minimal transport. If a transport direction is assumed from the south-west for the majority of the Murihiku sediments then the boulder association was derived from a different, probably closer source. A suite of rocks with some petrographic similarities can be found in the silicic association of the Dun Mountain Ophiolite Belt. Department The department where the student is studying primarily. Geology Named locality Named locality describing the field area location. Hokonui Hills Otamita Southland Thesis description Number of pages, maps, CDs, etc. 17, 24, 37 p., 10 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 1990Wright Creator An entity primarily responsible for making the resource Wright, Edward, 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 Some aspects of the geology of the eastern Hokonui Hills Subject The topic of the resource Structural geology Lithostratigraphy Hokonui Hills Kelvin Peak Mandeville Murihiku Supergroup Otamita Downs Southland Region https://theses.otagogeology.org.nz/files/original/f056ec03707213b10cb2bc3a581e1033.pdf 8fb0dc5c9f88fb8f55dbf93114edf860 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 ((167.984186035000107 -45.916060563999963,167.983926407000013 -45.919019788999947,167.983905132000018 -45.919262273999948,167.983384211000043 -45.925198676999969,167.983344014000068 -45.925656704999938,167.960826459000032 -45.924691957999983,167.919390334000013 -45.922904997999979,167.919919642000082 -45.916950928999938,167.920677875000024 -45.908419440999978,167.921015412000088 -45.904620676999969,167.914832438000076 -45.900129144999937,167.914119901000049 -45.899611425999979,167.909769372000028 -45.896447641999941,167.876008416000104 -45.871892961999947,167.876501478000023 -45.867542023999931,167.876615283000092 -45.866523744999938,167.879716513000062 -45.839126075999957,167.926932259000068 -45.841180580999946,167.931262448000098 -45.841368018999958,167.951299687000073 -45.857423431999962,167.976536846000045 -45.877623622999977,167.979494464000027 -45.879990452999948,167.986833867000087 -45.885861985999952,167.985742420000065 -45.89831414899993,167.985632577000047 -45.899566998999944,167.985351844000093 -45.902768722999951,167.984612252000034 -45.911201862999974,167.984186035000107 -45.916060563999963)) Author last name Last name of the Author Willsman Project type Is it an MSc, PhD, BSc(Hons) or PGDipSci? BSc(Hons) Advisers Who supervised/advised this student Landis, C.A. Abstract The Abstract for this thesis A terrane boundary was mapped between the Murihiku Supergroup and the Takitimu Group in the Wether Hill area, Western Southland. The two terranes {Murihiku and Brook Street) are juxtaposed along the gently eastward-dipping Let ham Ridge Thrust. The rocks to the west of the thrust comprise the steeply-dipping, eastward-younging, volcanoclastic sediments of the Takitimu Group. Pyroxene-phyric basalt and two-pyroxene andesite dykes intrude the Takitimu Group. A diorite plug with associated marginal sulphide mineralisation, and the Early Triassic hornblende andesite sills of the MacKinnon Peak lntrusives, intrude the Takitimu Group. An olivine monzonite dyke outcrops within the Takitimu Group to the north of Wether Hill, it is post Early Triassic in age. The Takitimu Group is unconformably overlain by gently eastward-dipping Jurassic sediment of the Barretts Formation. The Barretts Formation is comprised of conglomerate, sandstone, and siltstone, containing volcanic, plutonic, and metamorphic detritus. The Speights Limestone Melange outcrops within the Letham Ridge Thrust. Blocks within the melange include Permian limestones, sandstones, and siltstones. The Murihiku Supergroup is thrust over the Barretts Formation along the Letham Ridge Thrust. The Murihiku Supergroup within the area is comprised of Early to Late Triassic volcanogenic sediment, and two-pyroxene andesite. The sediments record a change from predominantly andesitic detritus in the Early to Mid Triassic to more felsic detritus in the Late Triassic. Petrographic data from sandstones of the Barretts Formation indicates that the sandstone composition is heterogeneous throughout the unit. The sandstone composition varies from lithic-rich {e.g Q:F:L-7:33:60) to quartzofeldspathic {37:34:29). The variable nature was also noted in the geochemical composition of the sandstones. Immobile trace element and major element concentrations vary between samples. Geochemical and petrographic work confirmed that the Barretts Formation was derived from a continental arc margin. Petrographic and geochemical differences suggests that the Barretts Formation and the Murihiku Supergroup did not share the same source during the Jurassic. The Late Cretaceous New Brighton Conglomerate overlaps both terranes. Sediment within the New Brighton Conglomerate has a higher proportion of intermediate to mafic volcanic, and sedimentary lithics, than sediment from the Barretts Formation, suggesting significant differences between these units. Small areas of Eocene coal measures of the Nightcaps Group unconformably overlie the Takitimu and Murihiku basement within the field area. Department The department where the student is studying primarily. Geology Named locality Named locality describing the field area location. Wether Hill Southland Thesis description Number of pages, maps, CDs, etc. ii, 116 p. : ill. (some col.), maps (some col.) ; 30 cm. Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Identifier An unambiguous reference to the resource within a given context 1990Willsman Creator An entity primarily responsible for making the resource Willsman, Andrew, 1969- 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 Stratigraphy, tectonics, and provenance of rocks in the Wether Hill area, Western Southland Subject The topic of the resource Tectonics Mesozoic geology provenance Southland Region Speights Limestone Melange Wether Hill 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/870e493ffb825084679c6cdc8c685122.pdf 2f5c023cf699493e0a22d0db02bc8feb 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 ((167.983212910194766 -45.854689460774829,167.902637199005682 -45.848732478229493,167.910223938552264 -45.788100179206516,167.992112851647761 -45.793633390413497,167.983212910194766 -45.854689460774829)) Author last name Last name of the Author Aslund Project type Is it an MSc, PhD, BSc(Hons) or PGDipSci? BSc(Hons) Advisers Who supervised/advised this student Landis, C.A. Abstract The Abstract for this thesis An area approximately 40km2, 10km north of Ohai, western Southland was mapped in detail. The area is roughly divided in two by the Tin Hut Fault, which is steeply dipping and strikes N-S. Rocks to the west of the fault comprise steeply eastward dipping, eastward facing volcaniclastic sediments of the Elbow Formation, Takitimu Group. To the east are rocks of the Caravan Formation, characterised by distinctive pyroxene-phyric basalts and two-pyroxene andesites intruding volcaniclastic sediments. In the southern part of the area, the Caravan strata have been overturned and now face south. To the north Caravan sediments are right way up and facing east. The genetic relationship between Takitimu Group and the Caravan Formation is uncertain. Productus Creek Group, an eastward dipping, richly fossiliferous Permian marine sequence, depositionally overlies the Caravan Formation. Together they comprise the Caravan 'subterrane'. Trapped between Takitimu and Caravan in the northern part of the area is a wedge of Lower Triassic Murihiku sediments and associated melange (Tin Hut Melange). The presence of this infaulted sliver places a lower limit on the timing of juxtaposition of the Caravan subterrane and Takitimu terrane. Emplacement of the Beaumont Intrusives (porphyritic hornblende-andesite) and an olivine monzonite dyke, both of which are found intruding Takitimu and Caravan rocks, post-dates any major strike-slip fault movement. The Caravan subterrane and intrusions are unconformably overlain by the Barretts Formation, a Jurassic conglomerate-sandstone sequence up to 200m thick, containing volcanic, plutonic and minor metamorphic detritus. Cretaceous Ohai Group sediments are faulted against Elbow Formation rocks in the NW. Ohai Group sediments are not found overlying Caravan subterrane, Murihiku Supergroup, Barretts Formation or melange. Murihiku Supergroup sediments have been thrust over Barretts Formation from the east along the Letham Ridge Thrust. Wairaki Melange crops out intermittently along the trace of this low angle fault. It comprises highly veined, deformed, fossiliferous blocks of Permian age in a sheared siltstone matrix. Triassic sediments also appear to have been incorporated in places. QFL data from Barretts sandstones show a range of compositions, from relatively quartzofeldspathic (e.g. QFL- 34:43:23) to lithic-rich (e.g. 3:35:62) sandstones, which are remarkably similar to that of Jurassic, as well as Middle and Upper Triassic Murihiku sandstones. Heavy mineral assemblages are also similar: both contain clinopyroxene, biotite, hornblende, muscovite, epidote, opaques, and rare garnet and titanite. In contrast, Lower Triassic Murihiku sandstones plot in a confined QFL field (average QFL- 3:47:50), and heavy mineral assemblages are comprised dominantly of epidote and opaques. I suggest that the arc which supplied material to the Murihiku depositional basin also contributed detritus to the Jurassic Barretts Formation. Department The department where the student is studying primarily. Geology Named locality Named locality describing the field area location. Beaumont West Southland 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 1988Aslund Creator An entity primarily responsible for making the resource Aslund, T Date A point or period of time associated with an event in the lifecycle of the resource 1988 Title A name given to the resource Permian-Jurassic Relations, Beaumont Area, western Southland. Subject The topic of the resource Map Mineralogy Sedimentary petrology Geochemistry Barrets Formation Barretts Formation Beaumont Caravan Formation Jurassic Leatham Ridge Thrust Murihiku (provenance) arc Murihiku Terrane Ohai Group Productus Creek Terrane Southland Region Takiti Tin Hut Melange Wairaki Breccia Wairaki River