b'Education matters Australian groundwater research.K 2 O, where a maximum anisotropymigrated to become concentrated in Additionally, employing use of artificialpotential peaks between 60% to 65%,fold hinges during the Kimban Orogeny; neural networks (machine learning)and approximately 5%, respectively.and (iv) the conductor is collocated with for the self-potential autonomousThe modelled density is successful ina ridge of high gravity (+ 200 to 500 detection and environmental noisedetermining the measured density,mGals). The origin of this high gravity filtration methods, we highlight theallowing the density for future samplesmay be due to a mafic intrusive block current gap in geophysical literatureto be determined indirectly. From theof oceanic crust, compressed during regarding the combination of theseresults of the study, more considerationsthe continental collision of the Kimban techniques. A light is drawn to theneed to be taken when observing theOrogeny. Utilising the constraints of the combined techniques immenselycompositional controls in the future for2-D model, a regional 3-D forward model promising future of potentialmetamorphic rocks. A narrower rangewas developed which shows agreement applications and contributions withinof rock types or chemistry could bewith compiled legacy data sets.the wider electrical geophysics dataconsidered, along with the mineralogy automation and filtration space.of the samples. Singular provincesUniversity of Sydney, New South Much akin to our continual pursuitshould also be considered to determine for mineralisation deposits, Australiaif conductivity for metamorphic rocksWalesHonours thesesis searching deeper than ever beforeoccur regionally. Furthermore, a focusedCian Clinton-Gray, University of Sydney: for crucial groundwater supplies asstudy on how the P-T conditions of aThe interplay of tectonics, eustasy and shallower sedimentary aquifers aresingular rock type change with thermalsurface processes on the North Slope of becoming fully utilised or depleted.conductivity can be assessed. SuchAlaska since the Jurassic.As we move forward towards this newanalyses will improve estimates of era of deepening natural resources,subsurface conductivity and the ability toThe North Slope of Alaska is a resource-we must further develop both oldaccurately estimate crustal temperatures. rich region located within the circum-and new tools which can enhanceArctic that has experienced a complex clarity of understanding within theseLachlan Loader, University of Adelaide:tectonic and geodynamic history. challenging hydrogeological systems. The Eyre Peninsula conductivity anomaly,Although regional palaeogeographic South Australia. reconstructions for the North Slope A major electrically conductingof Alaska have been interpreted from University of Adelaide, Souththe geological record, a process-Australia Honours theses structure has been spatially locatedbased understanding of the source-in the southern Eyre Peninsula, Southto-sink system accounting for both Celina Sanso, University of Adelaide:Australia. The structure extendsthe landscape and sedimentary basin Compositional controls on the thermalfrom the continental margin inlandevolution of the region has not been conductivity of metamorphic rocks. along the eastern margin of the Eyreundertaken.Peninsula, trending north-northeast Thermal conductivity is essential forfor approximately 150 km. In order toAdditionally, the interaction of the determining heat flow within the Earth,provide a two-dimensional image ofcomplex tectonic (including deep which is necessary for geothermalthe crust orthogonal to the conductorsmantle flow) and climatic forces and investigations, accurately modellingstrike, 39 broadband (1000 to 0.01 Hz)their influence on the development of tectonic and volcanic processes, andmagnetotelluric sites were collected withsedimentary basins is not well understood. predicting petroleum maturation.approximately 2km separation acrossThis study presents the first quantitative Although currently, conductivity canthe peninsula. A smoothed 2-D inversionforward modelling approach to explore be measured on hand samples, it canmodel demonstrated that the conductorsediment dynamics on the North Slope be impracticable to make regionalappears centred beneath a topographicof Alaska by using the surface process and subsurface models due to timehigh, structurally bound at the east bynumerical modelling code, pyBadlands. and expense required. In this study, anthe transpressional Kalinjala Shear ZoneIt aims to investigate the influence of analysis on the compositional controlsand resistive Donington Suite granitoids,tectonics (including deep mantle flow), on thermal conductivity of metamorphicand the Sleaford Complex to the west.eustasy and isostasy (including flexure) rocks is completed. Thermal conductivityThe main features from modelling are:on the source to sink system on the North was determined using an optical thermal(i) east of the Kalinjala Shear Zone,Slope to better understand its evolution scanner on 168 metamorphic samplesa region of high resistivity (> 1000since the Jurassic. This was achieved by with prior major oxide element analyses.ohm/m) relates to the Donington Suiteincorporating time-dependent dynamic Density is determined through models,granitoids; (ii) the late Archaean Sleafordtopography estimates from numerical as well as measured using ArchimedesComplex (24802420 Ma) bordering themodels linking plate motions and mantle principle. The results show that thermalDonington Suite granitoids features aflow. A series of temporally and spatially conductivity varies between 1.698 tolower, wider resistivity range between 5evolving tectonic events that represent 5.226 W m-1 K-1. When observing theto < 600 ohm/m, and is near-vertical inthe tectonic topography that results from relationships there is no trend betweenthe top 12km; (iii) the lowest resistivityrifting and collisions were also constructed. thermal conductivity and the majorstructure of < 0.1 ohm/m occurs atHorizontal displacements were integrated oxides. However, anisotropy has a loga depth of 510 km, and appears tointo the models by incorporating plate normal distribution with a mean ofterminate at a depth of 15 km. Thevelocities extracted from the tectonic 2.098 and a standard deviation oflow resistivity structure correlates withreconstructions using GPlates.1.346, and produces a weak negativebanded iron formations, and is credibly correlation with conductivity of 0.566.the result of biogenically depositedThe models capture the North Slopes A correlation occurs between SiO 2andgraphite in marine sediments, whichcounter-clockwise rotation away from the 41 PREVIEW DECEMBER 2019'