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Okataina

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Journal Article
Published: 01 August 2015
American Mineralogist (2015) 100 (8-9): 1778–1789.
...Karina A. Graeter; Rachel J. Beane; Chad D. Deering; Darren Gravley; Olivier Bachmann Abstract Granitoid lithic clasts from the 0.7 ka Kaharoa eruption at the Tarawera volcano (Okataina Volcanic Complex, Taupo Volcanic Zone, New Zealand) provide insight into the processes of rhyolite formation...
FIGURES | View All (9)
Journal Article
Journal: GSA Bulletin
Published: 01 July 2011
GSA Bulletin (2011) 123 (7-8): 1383–1405.
... on the fault scarps of rhyolitic fall tephra from the adjacent Okataina volcanic center. We also investigate processes that could be responsible for the time associations. From 40 high-resolution couplets of fault rupture and volcanic eruption (located up to 30 km distant), we show that 30% of the fault...
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Journal Article
Journal: Geology
Published: 01 April 2011
Geology (2011) 39 (4): 311–314.
...-hosted melt inclusions from eight eruptions in the Okataina Volcanic Center (OVC) of the TVZ to constrain magmatic volatile contents, pressures, and temperatures of quartz crystallization, and degassing of H 2 O, Cl, and minor CO 2 from the rhyolitic magmas. The OVC melt inclusions trapped volatile-rich...
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Journal Article
Published: 01 September 2004
Journal of the Geological Society (2004) 161 (5): 757–772.
...Victoria C. Smith; Phil Shane; Ian A. Nairn Abstract The 15.8 ka Rotorua rhyolite eruptive episode from the Okataina Volcanic Centre comprises a plinian pumice fall deposit followed by the extrusion of two rhyolitic lava domes or flows and their associated block-and-ash flows, with a total volume...
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Map of the <b>Okataina</b> Volcanic Complex (OVC) located within the central Taupo...
Published: 01 August 2015
Figure 1 Map of the Okataina Volcanic Complex (OVC) located within the central Taupo Volcanic Zone of the North Island, New Zealand. Inset shows location of the OVC on the North Island. Data from Nairn (1989) ; New Zealand Active Faults database; Leonard et al. (2010) ; Begg and Mouslopoulou
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Map of <b>Okataina</b> Volcanic Centre (OVC; from  Nairn 2002 ) showing distributi...
Published: 01 January 2008
Fig. 1.  Map of Okataina Volcanic Centre (OVC; from Nairn 2002 ) showing distribution of the Earthquake Flat Pyroclastics (EFP) and Rotoiti pyroclastic flow fans, the topographic rim of the Haroharo caldera collapse structure associated with the Rotoiti eruption, and the external ring structure
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Conceptual diagram of magma zones beneath <b>Okataina</b> Volcanic Centre immediat...
Published: 01 January 2008
Fig. 12.  Conceptual diagram of magma zones beneath Okataina Volcanic Centre immediately before the Earthquake Flat Pyroclastics and Rotoiti eruptions, and caldera formation. Mid-crustal plutons represent rhyolite plumes that ponded and largely crystallized at depth, with periodic rejuvenation
Image
Shaded relief map of the <b>Okataina</b> Volcanic Centre showing the outline of Ha...
Published: 01 September 2004
Fig. 1.  Shaded relief map of the Okataina Volcanic Centre showing the outline of Haroharo caldera. Inset map shows vent and sample locations for Rotorua eruptive rocks within the Okareka Basin. Middle Dome and Middle Coulee were extruded during the Rotorua eruptive episode and Northern Dome
Journal Article
Journal: Geology
Published: 01 March 1989
Geology (1989) 17 (3): 234–236.
... tephra units erupted over the past 50 ka from the Taupo and Okataina volcanoes, 28 were sampled, and most were analyzed for Th, Pb, Rb, Sr, Y, Zr, and Nb, as well as Fe-Ti oxide composition. Taupo volcano tephras erupted over the past 10 ka have uniform compositions for all elements except Sr, and all...
Journal Article
Journal: Geology
Published: 27 February 2020
Geology (2020) 48 (5): 504–508.
... volcanoes (intracaldera samples) contrast with those from the nearby, mafic intercaldera monogenetic centers. Intracaldera melt inclusions from the modern caldera volcanoes of Taupō and Okataina have lower abundances of incompatible elements, reflecting distinct mantle melts. There is a direct link showing...
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Journal Article
Published: 01 January 2008
Journal of the Geological Society (2008) 165 (1): 435–447.
...Fig. 1.  Map of Okataina Volcanic Centre (OVC; from Nairn 2002 ) showing distribution of the Earthquake Flat Pyroclastics (EFP) and Rotoiti pyroclastic flow fans, the topographic rim of the Haroharo caldera collapse structure associated with the Rotoiti eruption, and the external ring structure...
FIGURES | View All (12)
Journal Article
Published: 01 August 2009
American Mineralogist (2009) 94 (8-9): 1162–1174.
...Chad D. Deering Abstract The diverse range of calcic-amphibole compositions in eruptive products from the ca. 330 ka Matahina eruption (ca. 160 km 3 rhyolitic magma) of the Okataina Volcanic Complex, Taupo Volcanic Zone, including crystal-rich basalt-dacite pumice from post-collapse deposits...
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Series: Geological Society, London, Special Publications, Geological Society, London, Special Publications
Published: 01 January 2009
DOI: 10.1144/SP327.2
EISBN: 9781862395756
... with a central graben axis but is partitioned along strike into a number of structural domains or rift segments that are often coincident with major volcanic centres, for example Okataina and Taupo caldera complexes ( Spinks et al. 2005 ). Abstract The Taupo Volcanic Zone (TVZ) is an active continental...
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Journal Article
Journal: Geology
Published: 01 May 1997
Geology (1997) 25 (5): 459–462.
... response to the high permeability of the tephra deposit and gentle relief in the areas of substantial accumulation. Numerous small lakes occur among the dome complexes of Okataina caldera, and one direct result of the eruption was constriction of Lake Tarawera's outflow, which caused the lake to rise...
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CALIBRATED TEPHRA AGES, SOURCE VENT ZONES, AND MAGMA VOLUMESFOR THE POST–26...
Published: 01 July 2011
TABLE 1. CALIBRATED TEPHRA AGES, SOURCE VENT ZONES, AND MAGMA VOLUMESFOR THE POST–26 KA ERUPTION EPISODES FROM OKATAINA VOLCANIC CENTER(MODIFIED FROM NAIRN, 2002 )
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(A) Plot of tephra thickness in sediment cores verses probability. Probabil...
Published: 01 November 2009
Figure 9. (A) Plot of tephra thickness in sediment cores verses probability. Probability is expressed as a survivor function (see text) with a step-function curve. (B) Thickness of Okataina and Taupo rhyolite tephra at Auckland compared to known volume of the eruption.
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( a ) Location of the central Taupo Volcanic Zone (TVZ) North Island, New Z...
Published: 01 August 2009
F igure 1. ( a ) Location of the central Taupo Volcanic Zone (TVZ) North Island, New Zealand. ( b ) The central Taupo Volcanic Zone and Okataina Volcanic Centre (OVC) as one of seven major caldera-forming volcanic complexes. Inferred caldera boundaries are outlined in bold. ( c ) Mapped extent
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Figure 3. Chronology of the lahars and tephras that provide age constraints...
Published: 01 May 2007
calibrated using Stuiver and Reimer (1993) . OVC—Okataina volcanic center; TVC—Taupo volcanic center; TgVc—Tongariro volcanic center. Adapted from Donoghue and Neall (2001) .
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Bivariant plots of select electron probe microanalysis (EMPA) results. Dash...
Published: 01 January 2015
Figure 6. Bivariant plots of select electron probe microanalysis (EMPA) results. Dashed polygons are convex hulls of all the known Okataina and Taupo volcanic center results used in this study, except for the distinctly bimodal Rotorua tephra. Ovals are 95% confidence ellipses from EMPA analysis
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( a ) Location of the young (post‐330 ka;  Wilson  et al.  1995) Taupo Volc...
Published: 01 May 2000
Fig. 1. ( a ) Location of the young (post‐330 ka; Wilson et al. 1995) Taupo Volcanic Zone (TVZ) in the North Island of New Zealand. ( b ) Location of the Taupo volcanic centre within the central, rhyolite‐dominated portion of the TVZ. Okataina is the other modern rhyolite volcanic centre