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Showing 1 to 18 of 18 for “"Taupo volcanic zone"”.
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Three-dimensional magnetotelluric modelling of the Taupo Volcanic Zone, New Zealand
The Taupo Volcanic Zone (TVZ) is an important resource for New Zealand’s energy sector as it hosts the majority of New Zealand’s geothermal systems. To be able to increase the power generation in this area significantly over the next few decades, higher temperature fluids from greater depths will …
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Deep hydrology of the geothermal systems in the Taupo Volcanic Zone, New Zealand
… which give rise to the geothermal fields in the Taupo Volcanic Zone (TVZ), New Zealand. To carry out this study, a super-critical equation of state module has been developed for the geothermal simulator TOUGH2, which can describe the flow of water at the conditions expected deep in the TVZ. The …
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Geochemical and volcanological aspects of rhyolite eruptions from Taupo Volcanic Zone, New Zealand
The Taupo Volcanic Zone (TVZ) of New Zealand is the most frequently active rhyolitic zone on Earth, with more than 50 rhyolitic eruptions from its active volcanic centres, Okataina (OVC) and Taupo (TVC), in the last 50 kyr. The millennial-scale frequency of eruptions in the TVZ implies that the …
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Petrologic, geochemical and isotopic evolution of rhyolite lavas from the Okataina, Rotorua and Kapenga Volcanic Centres, Taupo Volcanic Zone, New Zealand
The Okataina Volcanic Centre (OVC) is a highly active modern silicic magmatic system at the northeastern end of the central Taupo Volcanic Zone, North Island, New Zealand. This study presents a set of petrographic, mineralogical, geochemical and isotopic data that focuses on the rhyolite lavas …
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Sediment-Pore Water Chemistry of Taupo Volcanic Zone Lakes and the Effect Trophic State has on Exchange with the Water Column
The Taupo Volcanic Zone (TVZ) is in the Waikato and the Bay of Plenty regions of North Island of New Zealand and contains many volcanic lakes of diverse history, physiography, and limnology. The lakes vary in size (0.2 to 620 km2), mixing regime (monomictic and polymictic), and trophic status …
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3D conceptual and TOUGH2 modelling of the Waiotapu geothermal field, New Zealand
… high-temperature system located in the Taupo Volcanic Zone (TVZ) in the North Island of New Zealand. Seven exploration wells were drilled in Waiotapu in the late 1950s, which are drilled to around 500 m - 1100 m depth. Although Waiotapu has seven deep exploration wells that reached a …
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Small-volume volcanism associated with polygenetic volcanoes, Taupo Volcanic Zone, New Zealand : a thesis presented in partial fulfilment of the requirements for the degree of Doctor of Philosophy in Earth Science at Massey University, Palmerston North, New Zealand
In the past 350 ky, the Taupo Volcanic Zone (TVZ) has been the most productive silicic volcanic region in the world, with 12 silicic large-volume (35-2200 km³ DRE) caldera-forming eruptions and hundreds of predominantly silicic smaller-volume eruptions. These spatially and temporally scattered …
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The thermal evolution of subduction zone lithosphere: Evidence from the chemical development of Mt. Ruapehu and surrounding vents, New Zealand.
… located at the southwest termination of the Taupo Volcanic Zone (TVZ) in the North Island of New Zealand where the Pacific Plate subducts beneath the Australian Plate. Volcanism has migrated south with time as rifting from the Kermadec arc has propagated into the North Island lithosphere …
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Neogene paleomagnetism and geodynamics of the Hikurangi margin, East Coast, New Zealand
… of the North Island Dextral Fault Belt and the Taupo Volcanic Zone at 1-2 Ma instigated the current tectonic regime. Collision of the Hikurangi Plateau in the Late Miocene is interpreted to have caused both the initiation of tectonic rotation, and the widespread remagnetization of sediments, …
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Deciphering the 4-D geological framework of the Taupo-Reporoa Basin: Implications for hydrothermal fluid flow and volcanism
The Taupo-Reporoa Basin (TRB) represents the easternmost basin in the central Taupo Volcanic Zone (TVZ), North Island, New Zealand, and hosts >2000 MW of the 4200±500 MW of heat output within this arc setting. Its geographic alignment with active volcanic centers (Okataina, Taupo), geophysical …
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Effects of lake trophic state and seasonal cycling on production and bioaccumulation of methylmercury in Te Arawa Lakes
… Mercury in New Zealand, primarily derived from volcanic activity and geothermal vents. Mercury (Hg) and its organic derivative, methylmercury (MeHg), are highly toxic to both the environment and human health. Of particular concern is the ability of MeHg to bioaccumulate in aquatic food webs, …
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VOLCANIC EMISSIONS AND DISTAL PALAEOENVIRONMENTAL IMPACTS IN NEW ZEALAND
… non-climatic effects on the environment from volcanic ash fall and toxic emissions outside the blast zone of a volcanic eruption. These effects are determined from palynological and geochemical changes following tephra fall at a range of sites across the North Island of New Zealand which were …
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Self-assembled optical diffraction sensor for water quality monitoring : a thesis presented in partial fulfilment of the requirements for the degree of Doctor of Philosophy in Engineering, Massey University, Albany, New Zealand
… New Zealand in 28 geothermal features from the Taupo Volcanic Zone and the Waikato region. Thus, a rising level of arsenic in drinking water creates the need to periodically monitor its levels in potable water. Commercially available methods are either laboratory-based or kit based techniques. …
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The timescales of andesite generation at Mount Ruapehu, New Zealand
… volcano lies at the southern end of the Taupo Volcanic Zone (TVZ) in the centre of North Island, New Zealand. Volcanic activity at Ruapehu is related to the subduction of the Pacifc Plate beneath the Indian Plate along the Hikurangi Trough. Major element trends are dominated by shallow …
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Remote sensing techniques for geothermal investigation and monitoring in New Zealand
… and monitoring of geothermal areas in the Taupo volcanic zone of New Zealand. The research and development of a helicopter-borne video thermal infrared scanner technique and associated computer image processing methods constitutes the major portion of this study. In addition, preliminary …
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Redox cycling of colloidal macro- and micro-nutrients in a monomictic lake
… a small monomictic lake in the Waikiti Valley, Taupo Volcanic Zone, New Zealand, which receives a considerable amount of nutrients and organic carbon input from the surrounding pastures. The study was designed to investigate the cycling of nutrients and dissolved organic carbon in lake Ngapouri, …
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Emerging stable isotope techniques in hydrothermal research: new methods applied to carbonates and hydrous minerals in ore deposits and geothermal fields
… Ngatamariki, Broadlands-Ohaaki) in the Taupo Volcanic Zone, New Zealand served as natural laboratories to test the validity of clumped isotope calibrations in high temperature settings up to 300 °C. Taking local fluid δ18O into account, results indicate modern TVZ calcite precipitated in …
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Analysis of the central Hawke's Bay sector of the Late Neogene forearc basin, Hikurangi margin, New Zealand
… the initiation of volcanism and rifting in the Taupo Volcanic Zone. The amount of Pliocene-Recent dextral-slip on the Ruahine Fault is likely to be less than 10 km, and there is probably less than 1 km of dextral-slip on the Mohaka Fault. New dextral-slip faults are developing in the basin fill …