1 10 2 https://theses.otagogeology.org.nz/files/original/b3faef444a9d4e79e092bcb855a2e6e3.pdf 39b1a01c55ffc435f42c22d7f64bb711 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 Rodway Project type Is it an MSc, PhD, BSc(Hons) or PGDipSci? MSc Advisers Who supervised/advised this student Palin, J.M. Abstract The Abstract for this thesis The provenance of sediments in the Western Southland Basins has been investigated using Ti-in-quartz geothermometry in conjunction with cathodoluminescence imaging, petrography and zircon geochronology. Data from the Fiordland basement along with the Te Anau, Waiau, Balleny and Winton basins are reported and used to interpret basin and source correlations, history, and regional tectonic evolution. Ti-in-quartz analysis yields unimodal peaks for all samples and equilibration temperatures that fall within a relatively restricted range. The data are useful in making empirical comparisons between: basement rocks and sediment, the different basins sampled and sediments within these basins. Differences between samples allows for discrimination between individual samples and basins. Similarities between samples are consistent with previous correlations. The data suggests a shift in Ti-in-quartz temperatures in relation to the stratigraphic sequence. Absolute Ti-in-quartz temperatures of Eastern Fiordland granite and numerous basin samples systematically yield equilibration temperatures below the wet granite solidus. This limits the resolution of the technique. Detrital zircons from five of the six samples analysed show an almost absolute dominance of Early Cretaceous U-Pb ages. This is consistent with the interpretation of an Eastern Fiordland provenance for these five samples. The Blackmount Formation is strikingly different and appears not derived from Fiordland but from rocks of New Zealand’s Eastern Province. Subtle features displayed in the Ti-in-quartz geothermometry and zircon geochronology results suggest migration of the sediment sources from the Eocene through to the Miocene. A combination of all information acquired is used to consider basin and regional tectonic evolution. OURArchive handle The handle from the Otago University Research Archive (OURArchive) <a href="http://hdl.handle.net/10523/2486">http://hdl.handle.net/10523/2486</a> OURArchvive access level Abstract Only Department The department where the student is studying primarily. Geology Named locality Named locality describing the field area location. western Southland Thesis description Number of pages, maps, CDs, etc. xxi, 218 p. : ill. (some col.), 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 2012Rodway Creator An entity primarily responsible for making the resource Rodway, Ewen Maurice Date A point or period of time associated with an event in the lifecycle of the resource 2012 Title A name given to the resource Ti-in-quartz geothermometry and sediment provenance in the Western Southland basins Subject The topic of the resource Geochemistry Petrology Ewen Fiordland geothermometry New Zealand Palin provenance quartz Rodway Southland Te Anau titanium Waiau Western https://theses.otagogeology.org.nz/files/original/90b80904f42e95ee8c2bb6e621242176.pdf e8cb9c66cf47dcb3e4b95fe99f6c3e8b 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 ((167.790581266789701 -45.142539454861115,167.784902128490643 -45.189914685798385,167.704277034220468 -45.187623313151136,167.607989274395408 -45.137375066755084,167.617109768558436 -45.069211732443677,167.680825167103734 -45.070776709802033,167.790581266789701 -45.142539454861115)) Author last name Last name of the Author Zink Project type Is it an MSc, PhD, BSc(Hons) or PGDipSci? PhD Advisers Who supervised/advised this student Landis, C.A. Norris, R.J. Abstract The Abstract for this thesis After spreading ceased in the Tasman Sea in the Late Cretaceous, reorganisation of the Pacific-Australia plate boundary within the New Zealand region saw the development of several sedimentary basins during an extensional phase in the Middle Eocene to Oligocene. The Te Anau Basin was one of these basins. During this period, it opened adjacent to the eastern margin of Fiordland, a crystalline basement complex of Paleozoic to Cretaceous age, and is the main subject of this thesis. A detailed study of sedimentary facies occurring within the up to 7000 m thick basin-fill identified a vast range of lithofacies. Depositional environments represented include alluvial fans and braided and meandering rivers feeding deltas along the margins of the basin. Estuarine conditions are indicated by a diagnostic mollusc fauna. Shallow marine facies include an extensive limestone shelf represented by the Tunnel Burn Formation. A whole series of submarine fans such as the upper Sandfly Formation or the Turret Peaks Formation formed in deeper marine settings. These fans can be observed grading into a hemipelagic background mudstone mapped as Waicoe Formation. Faults controlling the Te Anau Basin are rarely exposed, but a comparison of sediment sequences allows reconstruction of kinematics, preferred orientation and timing of several fault systems. A NNE striking system, parallel to the basin axis and including the faults controlling the overall halfgraben geometry of the basin, directly reflects the regional tectonic setting. Pre-existing sets of NE and NW trending faults, cutting through Fiordland in straight lines, influenced sedimentation along the western basin margin where they cut it at high angles and produce distinct depocenters. Paleogeographic reconstruction of SW New Zealand shows the Te Anau and Waiau basins as separate entities throughout much of their history. The Te Anau Basin is shown here to have opened from the south as a north-south trending halfgraben, defining the eastern boundary of Fiordland. It is inferred to have been separated from the Waiau Basin to the east by an elongated basement high, which was subsequently destroyed during Pliocene to Recent compression. A northward connection of the Te Anau Basin with the West Coast Basins as proposed by several previous authors seems unlikely. The overall tectonic regime in which the Te Anau Basin developed is well constrained from seafloor data. This allows the sedimentary record of basin evolution to be compared directly to an independent plate tectonic model. The "tectonic signal" is isolated from the sedimentary record of the basin and compared with global models for extensional and strike-slip basins. Aspects of both are recognised, compatible with the transtensional origin indicated from plate tectonics. Changing tectonics towards strike-slip and finally transpression are also recognised within the sedimentary record. A possible modern analogue is the Gulf of California. However, basins opening at the head of the Gulf at present are strike-slip dominated. Only the southern Gulf underwent an early, rifting phase, followed by subsequent transtension. Basins related to this early rifting, like the Loreto Basin, are seen as the closest analogues to the Te Anau Basin. OURArchive handle The handle from the Otago University Research Archive (OURArchive) <a href="http://hdl.handle.net/10523/3552">http://hdl.handle.net/10523/3552</a> OURArchvive access level Abstract Only Department The department where the student is studying primarily. Geology Named locality Named locality describing the field area location. Te Anau (Western Southland) Thesis description Number of pages, maps, CDs, etc. 1 v. (various paging) : ill. (some col.), maps (some col., some folded) ; 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 2000Zink Creator An entity primarily responsible for making the resource Zink, Christoph, 1968- Date A point or period of time associated with an event in the lifecycle of the resource 2000 Title A name given to the resource Middle Eocene to middle Miocene evolution of the Te Anau basin, western Southland, New Zealand Subject The topic of the resource Cenozoic Geophysics Sedimentology Tectonics basin evolution sedimentological history Te Anau tectonics