Geology
Recent Deposits
-
Arsenic : the influence of natural parameters on its oxidation and mobilization in gold mines
Arsenic (As) is a common constituent of mining and geothermal systems. Literature has described the element as a toxin and human carcinogen particularly when it exists as As (III). Wairakei (North Island, New Zealand) ... -
Characterisation of the sediment budget of Otago Harbour : a geophysical and sedimentological study
Urban tidal inlets often lend themselves to economically important port development. In many cases, such inlets are artificially deepened and maintained for continuous human use. A range of ecological, hydrological, ... -
3D Gravitational Inversion Modelling of the South Dunedin Sub Basin, Otago, New Zealand
3D gravitational modelling of an infilled coastal sedimentary basin is rare, with almost all 3D gravity publications being based on mineral deposits related to hard rock mineral density features. The sediment-bedrock ... -
Hydrothermal alteration within the alpine fault zone
Hydrothermal alteration, hosted in brittle structures, has been documented along the length of the Alpine Fault Zone. The along-strike profile has been divided into two geographical groups based on differing fault zone ... -
Microstructural evolution of polycrystalline ice during non-steady state creep
The mechanics (rheology) of polycrystalline ice Ih are important to understand the dynamics of glaciers, ice sheets and icy moons in the outer solar system. Moreover, the microstructure and rheology of deforming polycrystalline ... -
Proposals for the proving and exploitation of the Buller Gorge uranium field
The discovery was followed by extensive prospecting in the area and early in 1956, prospectors employed by Nelson Lime and Marble Co. Ltd. found highly radioactive conglomerate boulders in the Buller River, in the vicinity ... -
Latest Cretaceous to earliest Paleogene molluscan faunas of New Zealand : changes in composition as a consequence of the break-up of Gondwana and extinction
Uppermost Cretaceous (Campanian?-Maastrichtian) to lowermost Paleogene (Paleocene) rocks of New Zealand contain an exceptional record of Bivalvia, Gastropoda and Scaphopoda. The composition of these faunas is closely linked ... -
Origin of garnet pyroxenites in the Kakanui Mineral Breccia
The southernmost limit that the Hikurangi Plateau subducted beneath New Zealand in the Early Cretaceous has been interpreted from seismic data to be somewhere between Dunedin and Timaru. I test this hypothesis from a ... -
Sedimentologic, petrographic, and tectonic aspects of Torlesse and related rocks: South Island, New Zealand.
Carboniferous to Lower Cretaceous Torlesse rocks and Haast Schist derivatives constitute the major part of the ''eugeosynclinal" facies of the Eastern Province of New Zealand. Strata consist largely of quartzofeldspathic ... -
Causes and Consequences of Heterogeneous Flow Behaviour in Ice
Many ice flow models treat polar ice as chemically pure and mechanically isotropic, while in reality it can have pre-existing crystallographic preferred orientations, soluble impurities, and mechanical heterogeneities which ... -
Mobilisation of arsenic, antimony, and gold in redox-dynamic settings, South Island, New Zealand.
The elements arsenic (As) and antimony (Sb) are commonly enriched in mesothermal gold deposits and predominantly occur as the sulfide minerals arsenopyrite and stibnite, respectively. In such deposits, these sulfides can ... -
Ash Generation in the 2012 Eruption of Havre Volcano, Kermadec Arc: The Largest Deep Subaqueous Eruption of the Last Century
The 2012 silicic eruption at Havre volcano, in the Kermadec Arc, was the largest deep subaqueous eruption observed in the last century. A data set of unprecedented richness was collected during a dedicated research cruise ... -
Partitioning of plate boundary deformation in South Westland, New Zealand : controls from reactivated structures
The Australian-Pacific plate boundary is an uncomplicated structure along most of its length in the South Island, New Zealand. In South Westland, south of the Arawata River, however, several terranes converge onto the ... -
Conditions, Style and Paragenesis of Mineralisation in the Cascade Creek Mo-Porphyry Deposit, Westland
A km-‐scale zone of enriched molybdenum (Mo) occurs where Cretaceous felsic-‐intermediate granitoids of Rahu Suite Berlins Porphyry intrude greenschist facies Greenland Group metasedimentary rocks in Cascade Creek, ... -
Is The Hearing of Whales and Dolphins Fully Developed at Birth?: An investigation of the odontocete inner ear
Sound is an essential component of toothed whale and dolphin (odontocete) biology. The advanced hearing-dependent activities of precocial calves lead us to believe that hearing is fully functional by birth. Nevertheless, ... -
Geophysical characterisation of the Alpine Fault at Haast, Turnbull and Whataroa, New Zealand
The geometry of the upper-crustal portion of the Alpine Fault, the Australian-Pacific plate boundary on the South Island of New Zealand, is poorly constrained by geophysical studies where it cuts through the young sedimentary ... -
Gas hydrate system dynamics in the Uruti Basin, an upper slope basin on New Zealand's Hikurangi Margin
Gas hydrate is a large potential unconventional energy resource. However, uncertain-ties still remain about gas hydrate system dynamics, including the processes that stimulate growth, development and change within a gas ... -
Structural setting and paragenesis of the mineralised veins in the Waipori goldfield, southeast Otago, New Zealand
The Waipori goldfield was discovered in 1861 on the southeast side of the Otago Schist belt in the area surrounding Lake Mahinerangi. Accurate historical records are not available but it is estimated the goldfield produced ... -
Paragenesis and geochemistry of scheelite deposits at Glenorchy, West Otago
Scheelite (CaWO4) is a major tungsten ore mineral that has commercial and industrial uses. Widespread scheelite deposits occur as mineralised quartz veins filling extensional faults in the Glenorchy region, NW Otago. ... -
The effects of graphite and porosity on the mechanics of the Alpine Fault, New Zealand
New Zealand’s Alpine Fault is a major crustal-scale structure that accommodates around 75% of relative Australian-Pacific plate motion. This active transform fault ruptures in a large earthquake every 291 ± 23 years, most ...