1 10 4 https://theses.otagogeology.org.nz/files/original/5cd4f94491218adc3556dbacc621345c.pdf f83a22bc7377e3260c7274a4c740a614 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 ((169.39864105009022 -46.59991558099329,169.438251490360358 -46.60175256676775,169.439393040043171 -46.617266900762857,169.398418835699431 -46.616280380181223,169.39864105009022 -46.59991558099329)) Author last name Last name of the Author Miller 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 The nature and provenance of the Jurassic McPhee Cove Conglomerate, Murihiku Terrane, New Zealand, has been investigated using clast petrography, geochemistry and age. The McPhee Cove Conglomerate forms three strike belts within a 12 sqkm area in the Catlins, southeast Otago. The outcrop studied here is based mainly on 50m high cliffs immediately south-west of Tautuku Peninsula at l.athyrus Bay. The McPhee Cove Conglomerate is a 50m thick, polymict, mostly metre bedded, unfossiliferous, poorly sorted orthoconglomerate, with minor sandstone interbeds. Clasts are rounded to well rounded and range in size from granule to boulder. The conglomerate is Ururoan to LowerTemaikan in age and is underlain by the Otekura Formation and overlain by the Purakauiti Formation. It is intetpreted as debris flow deposits, deposited on a shallow submarine-fan. The McPhee Cove Conglomerate consists of plutonic (31% ), volcanic (33% ), volcaniclastic (sedimentary) (34%) and lesser metamorphic (2%) clasts. The plutonic clasts have island arc geochemical characteristics, are calc-alkaline in composition, have 1-type plutonic characteristics and range from granite, granodiorite to monzodiorite, but are dominated by high Si02 (70-76 wt%) granites. The volcanic, volcaniclastic and metamorphic clasts also have island arc geochemical characteristics. Volcanic clasts range from rhyolite to basalt and the volcaniclastic dasts are weakly metamorphosed, dominantly crystal-lithic volcanic sandstones to breccias. The metamorphic clasts are quartzofeldspathic gneisses. Geochemical analyses have defined two clast populations. The majority of the plutonic (81% ), volcanic, volcaniclastic and metamorphic clasts have similar geochemical compositions and representative samples from this group have yielded Permian U-Pb dates of 260±5 Ma and 268±5 Ma This suggests that this group as whole may have been derived from a dissected Permian arc. A secondary population, although similar petrographically to the group discussed above, has geochemical characteristics that deviate from the main population. This smaller group is composed of alkali feldspar granites, samples with adakitic geochemical affinities, and monzonites to monzodiorites. Samples from this group have yielded Jurassic dates of 186±6 Ma and 181±6 Ma. Assuming that the dated samples adequately represent the two populations then at least two suites of arc rocks have supplied detritus to the McPhee Cove Conglomerate. Although the clasts show a broad resemblance to igneous rocks of the Median Tectonic Zone, on the combined basis of petrography, geochemistry and geochronology no source terranes for either the Permian or Jurassic groups are presently recognised in New Zealand. Department The department where the student is studying primarily. Geology Named locality Named locality describing the field area location. Tautuki Thesis description Number of pages, maps, CDs, etc. xii, 198 p. : ill. (some col.), maps (one folded) ; 26 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 1999Miller Creator An entity primarily responsible for making the resource Miller, Hannah Elizabeth, 1977- Date A point or period of time associated with an event in the lifecycle of the resource 1999 Title A name given to the resource McPhee Cove conglomerate, Tautuku, south-east Otago Subject The topic of the resource Sedimentology Igneous petrology Jurassic Murihiku provenance Tautuki https://theses.otagogeology.org.nz/files/original/104512ff7a1d1c8b33dac48686575fa2.pdf 1b4ccbdbcaab31f29375d29a93f11b0b 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 ((167.979419139184472 -45.818590705822771,167.923015582660952 -45.865631176347271,167.921748641917389 -45.905634708672579,167.869251039495111 -45.90518883195822,167.875267434496919 -45.847346198383356,167.941078261454322 -45.816942876333293,167.979419139184472 -45.818590705822771)) Author last name Last name of the Author Douglas 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 Two suites of potassic igneous rocks intrude the Takitimu Group in the Wether Hill area. The first suite, the Wether Hill olivine monzonite, comprises a 9km long linear dyke and small stock intrusion .. The Wether Hill olivine monzonite dyke is characterised mineralogically by distinctive glomeroporphyritic of labradorite feldspar. Potassium feldspar occurs in the groundmass in equal proportions to plagioclase. The Wether Hill olivine monzonite suite is remarkably unaltered in comparison to the countryrock which it intrudes. A second suite, the Razorback monzonite, is made up of a series of dykes which are intruded at similar orientations to the Wether Hill olivine monzonite. Mineralogically this suite is characterised by alteration of plagioclase feldspar to albite, while potassium feldspar remains pristine. Olivine is absent and biotite is a major phase in the groundmass of this rock indicating that the magma was hydrous when the dykes were emplaced. The Razorback monzonite has undergone deuteric metamorphism causing it to be altered while the Wether Hill olivine monzonite has not. Geochemically both suites fall in a very narrow compositional range. They have anomalously high potassium contents (>4%) at a basaltic silica range and are part of the shoshonite association. Despite the alteration of the Razorback monzonite, its geochemistry is consistent between samples and very similar to the Wether Hill olivine monzonite dyke with which it is associated. The Takitimu Group forms the basement in the area of study. It is largely made up of volcanic arc derived volcaniclastic material, largely deposited in a marine environment by mass flows. Small penecontemporaneous intrusions occur within the sediments of the Takitimu Group. The Takitimu Group formed in an oceanic arc basin setting within a dynamic sedimentary setting where intrusive and extrusive volcanism occurred as sedimentation progressed. The Takitimu Group sediments were tilted or folded in the Late Permian prior to the deposition of the Productus Creek Group. Limestone of the Pro ductus Creek Group rests unconformably on the Takitimu Group rocks at Mt Wilanda. The time of emplacement of the shoshonitic intrusions is constrained by crosscutting relationships with the Triassic MacKinnon Peak Intrusive suite and by the unconformably overlying Early-Middle Jurassic Barretts Formation. They are believed to represent a period of stabilisation in a late stage island arc setting or in a postcollisional arc. This is supported by the erosion of a continental landmass to form the Barretts Formation in the Early-Middle Jurassic. Department The department where the student is studying primarily. Geology Named locality Named locality describing the field area location. Wether Hill Thesis description Number of pages, maps, CDs, etc. iii, 88 p. : ill., 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 1997Douglas Creator An entity primarily responsible for making the resource Douglas, Anne, 1976- Date A point or period of time associated with an event in the lifecycle of the resource 1997 Title A name given to the resource Potassic intrusions into the Takitimu Group, Wether Hill Subject The topic of the resource Igneous petrology Barretts Formation Jurassic monozonite Takitimu Scarp 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 https://theses.otagogeology.org.nz/files/original/6c3d52fafa41acccc650e252ce7508ea.pdf bf0cd8671611bcfad6340e6f8c1b326b 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 ((169.324672369190665 -46.640010217113463,169.328263145141506 -46.617621825305292,169.379499629133051 -46.618899676620167,169.377482405908495 -46.641339504291388,169.324672369190665 -46.640010217113463)) Author last name Last name of the Author Geary Project type Is it an MSc, PhD, BSc(Hons) or PGDipSci? BSc(Hons) Advisers Who supervised/advised this student Carter, R.M. Abstract The Abstract for this thesis Chaslands Mistake is a prominent headland lying on the south-east Otago coast, within N.Z.M. sheets S183 and S184. Access is from the Balclutha-Invercargill coast road, via the Cathedral Caves track and Waipati Beach. Approximately one hour is required from the road to the Chasland's Headland; the Waipati Estuary can only be forded at half to low tide levels. The only previous detailed geological work done at Chaslands Mistake is that by Speden (1971 ), described in "Geology of the Papatowai Subdivision", Geological Survey Bulletin 81, which covers the northern side of the headland. This report presents the results of a (somewhat) more detailed investigation into the geology of Chaslands Mistake, with particular emphasis on the sedimentary geology. The sediments in the coastal section are described. using the (now well established) technique of facies analysis (e.go Reading, 1970; Selley, 1970). The spatial distribution of facies associations is indicated on a map of Chaslands Mistake and facies relationships in a vertical sequence shown on Section A. The geography of the headland is dominated by high coastal cliffs along the southern coast. Away from the coast the land is covered by thick bush which makes detailed sedimentary work impractical on anything other than the coastal exposures. The map of Chaslands Mistake was drawn from 1 inch : 60 chain topographic mapping sheets obtained from the Lands and Survey Department. Detail was added from air-photos N.Z.M.S. Runs 15 95/39-41. Topographic heights have been transformed to metric units. Various localities have been informally named(i.e. South Bay), and location numbers (i.e. hoc 1) added for ease of reference. Early maps of the Catlins area depict the Jurassic sedimentary rocks in biostratigraphic terms. This approach was also used in the New Zealand Surveys 1:250 000 Geological Map of New Zealand. The first worker to attempt a formational subdivision of Cat1ins geology was Speden (1971), whose comprehensive bulletin provides a lithostratigraphic framework for the rocks of the district. The Chaslands Mistake area falls at the extreme southwest of the area mapped by Speden, only partly lying within his map boundaries. Chaslands Mistake lies on the southern limb of the Fortification Syncline, one of several parasitic fold.s mapped by Speden on the "south limb" of the regional Southland Syncline. OURArchive handle The handle from the Otago University Research Archive (OURArchive) <a href="http://hdl.handle.net/10523/2798">http://hdl.handle.net/10523/2798</a> OURArchvive access level Open Access Department The department where the student is studying primarily. Geology Named locality Named locality describing the field area location. Chaslands Mistake Thesis description Number of pages, maps, CDs, etc. 84 leaves : illus., maps 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 1976Geary Creator An entity primarily responsible for making the resource Geary, Geoffrey Clive. Date A point or period of time associated with an event in the lifecycle of the resource 1976 Title A name given to the resource Jurassic sediments at Chaslands mistake. Subject The topic of the resource Map Lithostratigraphy Mesozoic Jurassic