Geology
Recent Deposits
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Geological report on areas nos. 16, 18, 21, 22 and 26
“The present report outlines the results of the survey of Areas Nos. 16,18, 21, 22, and 26, situated in the Uawa, Waingaromia and Tokomaru Survey Districts. [...] Purpose of Investigation. The purpose of investigation ... -
Morphology and systematics of the fossil penguin Platydyptes
New Zealand has one of the most extensive penguin records in the world, from the oldest known penguin Waimanu (~60-62 Ma) to several extant species such as Eudyptula minor (Little Blue Penguin) and Megadyptes antipodes ... -
Holocene stratigraphy and sequence architecture of the Blueskin Bay estuary, East Otago
The Holocene stratigraphy of the Blueskin Bay estuary was investigated using percussion cores. The Blueskin Bay estuary Holocene sequence comprises eight lithofacies arranged into a central estuarine basin consisting of ... -
Thesis on the Austral New Zealand Mining Company Limited's gold dredge at Lowburn, Central Otago
From various and widely differing accounts it appears that dredging, though probably a veryold industry, has only made rapid advances in designs and types of machines during the last fifty or sixty years. It is almost ... -
Magnetostratigraphy of the ORE-1 Drill Core from Orepuki, Southland
Geological paleoclimate reconstructions can be used to reduce the uncertainty of the Equilibrium Climate Sensitivity (ECS) which describes the amount of warming Earth will experience in response to a doubling of PCO2. ... -
Gravity Modelling of Groundwater Aquifers in South Dunedin, New Zealand
The aquifer of South Dunedin, set within low-lying coastal sediments that infill a paleovalley, needs to be understood better to evaluate how the hydrogeological system responds to large influxes of surface water from the ... -
Geophysical characterisation of gas hydrate systems on the southern Hikurangi Margin of New Zealand
Natural gas hydrates act as an efficient natural sequester of large amounts of carbon, and it is estimated ~15% of Earth's total mobile carbon could be stored in gas hydrate provinces. They form complex systems in the ... -
The geology of the Green Valley, Morrisons area, North Otago
“The area described comprises 40 square miles from Shag Valley Station to Pigroot Creek along Main Highway 85 (commonly known as the Pigroot). It lies within parts of the National One-mile Series Maps S135, S136 (Oamaru), ... -
Paretio puzzle whale (Cetacea: Mysticeti) pieces together past and phylogeny
New Zealand rocks have yielded numerous fossil cetaceans, both odontocetes and mysticetes. Many fossil cetaceans in New Zealand come from the Waitaki valley aged around the Oligocene and Miocene. Mysticetes in New Zealand ... -
Natural aggregate resources in Fiji: Mineralogical and geochemical characteristics and its implications for their quality
Natural aggregates are a low commodity, high-value material. It plays a major role in creating, maintaining, and enhancing the infrastructure in society. With this comes the responsibility to select the best possible ... -
Explosive Submarine Volcanism at Lō`ihi Seamount, Hawai`i
Even though the vast majority of volcanism on Earth occurs under water, very little is known about submarine volcanoes and their eruptions. The hydrostatic pressure at submarine vents was long thought to preclude submarine ... -
High resolution lacustrine records of Late Holocene climate change from southern New Zealand
New Zealand freshwater ecosystems are directly impacted by temperature and precipitation variations controlled by the strength and position of the Southern Hemisphere Westerly Winds. Understanding westerly wind controls ... -
Expanding the Footprint of Orogenic Gold –Trace Elements in Sulphides
The Macraes orogenic gold deposit in Central Otago, New Zealand was formed within the Otago Schist in the Early Cretaceous during long-lived terrane accretion and crustal thickening because of subduction along ... -
Understanding the Mechanics of Natural Ice
One of the most substantial challenges posed to us today is global warming induced by human activity. Some recent studies have shown ice loss from polar ice sheets such as the West Antarctic Ice Sheet (WAIS) is accelerating ... -
Large earthquake recurrence in low seismicity regions: Accounting for aperiodicity
In this thesis I investigate the recurrence of large earthquakes in low seismicity regions. A number of previous studies have found evidence that suggests large earthquakes recur less regularly on low activity-rate faults ... -
Geochemical characterisation of scheelite from New Zealand
The trace element and isotopic compositions of scheelite CaWO4 from a variety of deposits in New Zealand were measured using LA-ICPMS and LASS-ICPMS. As part of this, a new method for determining in-situ Sm-Nd isotopic ... -
Anatomy of intraplate monogenetic alkaline basaltic magmatism: clues from magma, crystals and glass
Intraplate basaltic systems, often occurring as fields of small monogenetic volcanoes, are dominated by eruption of alkaline basaltic rocks, ranging from nephelinite/basanite to transitional/subalkaline. Their generally ... -
Intra-eruptive trachyte-phonolite transition: natural evidences and experimental constraints on the role of crystal mushes
The generation of silica undersaturated phonolite from silica saturated trachytes is uncommon, as it implies the crossing of the thermal barrier and critical plane of silica undersaturation. Nevertheless, a co-genetic suite ... -
Comparative anatomy and functional morphology of the forelimb in cetaceans from New Zealand
The transition of early semi-aquatic archaeocetes to fully aquatic modern whales and dolphins is documented by a wealth of fossil evidence, and one of the most profound and well-studied macroevolutionary events in mammalian ... -
Deformation processes and rheology of the lithospheric mantle under Zealandia: a case study of samples from the Dun Mountain Ophiolite Belt and Otago ultramafic xenoliths, South Island, New Zealand
Peridotitic xenoliths in Cenozoic volcanic rocks around Otago and the Dun Mountain Ophiolite in the South Island of New Zealand offer a window into the lithospheric mantle beneath the Zealandia continent. We selected ...