1 10 1 https://theses.otagogeology.org.nz/files/original/729bc8f856bc2972df381425d44f9bb3.pdf 487485504695e8b5f0115beac8325460 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 ((166.091533061044828 -50.734988116718661,166.162539879670106 -50.722165330054374,166.174423866050915 -50.71990211904938,166.181257158219893 -50.733291185792147,166.109061940956565 -50.748184358540186,166.091533061044828 -50.734988116718661)) Author last name Last name of the Author Einvik-Heitmann Project type Is it an MSc, PhD, BSc(Hons) or PGDipSci? PGDipSci Advisers Who supervised/advised this student Moy, C. Ohneiser, C. Abstract The Abstract for this thesis A sediment core (14PL001 – 39P4), collected from the Hanfield Inlet on the subantarctic Island of Auckland Island by a scientific research group from the University of Otago, have been subject to an environmental magnetic study by the use of u-channel samples. Lithostratigraphic analyses was carried out on the core, which contain the transition from a lacustrine environment to a marine environment through an inter-bedded sequence which was correlated to regional sea-level curves, indicating a date of ~8ka. High-resolution magnetic measurements of natural remanent magnetisation intensity, anhysteric remanent magnetisation intensity and magnetic susceptibility, and a stepwise alternating field demagnetisation were performed on the u-channels. Declination, inclination and median destructive field were determined throughout the core by the use of a principal component analysis of orthogonal component vectors. Chemical alteration of titanomagnetites and authigenic growth of pyrrhotite and greigite dominated a larger interval, complicating environmental interpretations. Magnetic mineralogy were therefore further investigated on sub samples by measuring thermomagnetic behaviour and isothermal remanent magnetisation together with energy dispersive spectroscopy. A proxy sensitive to magnetic grain size changes, related to the Holocene westerly wind variability was developed by plotting the measurements of the anhysteric remanent magnetisation intensity on the magnetic susceptibility measurements. The proxy together with sedimentary and mineralogical observations support the suggested pattern of a strong core in the westerly winds for the early Holocene, succeeded by a weak core for the late Holocene. Department The department where the student is studying primarily. Geology Named locality Named locality describing the field area location. Hanfield Inlet Auckland Islands Thesis description Number of pages, maps, CDs, etc. 86 pages A4 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 2014Einvik-Heitmann Creator An entity primarily responsible for making the resource Einvik-Heitmann, Vegar Date A point or period of time associated with an event in the lifecycle of the resource 2014 Title A name given to the resource Unravelling the Secrets of the Subantarctic Auckland Island Inlets: An Environmental Magnetic Study of a Holocene Sediment Core Subject The topic of the resource Paleoclimatology 14PL001-39P4 Environmental magnetism Holocene paleomagnetism sediment core