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Oruanui Ignimbrite

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Feldspar from the <span class="search-highlight">Oruanui</span> <span class="search-highlight">Ignimbrite</span>, Taupo, New Zealand, showing isotopic ...
Published: 01 August 2007
FIGURE 3 Feldspar from the Oruanui Ignimbrite, Taupo, New Zealand, showing isotopic variation from core to rim. The ignimbrite is 26,500 years old; so, given the low Rb/Sr of the feldspar, the ratios measured are initial ratios with no age correction necessary [analytical precision is about ±30
Image
U-Th age spectra for zircon crystals from four <span class="search-highlight">ignimbrites</span> from Taupo, New ...
Published: 01 August 2007
eruption. In some cases (e.g. the Tihoi Ignimbrite) single zircon crystals record different core-rim ages, reflecting growth in different magmas (cf Fig. 1 ). In other cases, such as the two Oruanui Ignimbrite zircon crystals shown, cores and rims have indistinguishable ages.
Journal Article
Journal: Geology
Published: 01 June 2012
Geology (2012) 40 (6): 563–566.
... horizontal stress through rifting-related processes would cause mild overpressure and drive magma sideways, rather than to the surface ( Lister, 1990 ). The area northeast of Taupo is intensively faulted, and the Kaiapo fault ( Fig. 1 ) was a clean scarp against which Oruanui ignimbrite was banked in later...
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A, B: Relative abundances of diatom species groups in lithic clasts extract...
Published: 01 November 2013
Figure 2. A, B: Relative abundances of diatom species groups in lithic clasts extracted from proximal Oruanui (New Zealand) ignimbrite (A) and Oruanui fallout tephra (B), shown with increasing distance from source. Six species groups: i— Aulacoseira ambigua ; ii— Cyclostephanos novaezeelandiae
Journal Article
Journal: Elements
Published: 01 February 2008
Elements (2008) 4 (1): 29–34.
... pyroclastic deposits. ( A ) Typical proximal plinian fall deposit (Oruanui, New Zealand). Note the uniformity of particle sizes, the particle angularity and the absence of fine-ash matrix, the result of winnowing in the high eruption plume. Darker fragments are lithic material. ( B ) Typical ignimbrite...
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Illustrative maps showing the extent of widespread pyroclastic products fro...
Published: 01 February 2008
FIGURE 3 Illustrative maps showing the extent of widespread pyroclastic products from two New Zealand supereruptions. ( A ) Isopachs (lines of equal thickness) of fall deposits from the 26.5 ka Oruanui eruption. ( B ) Observed sites (red dots) and inferred original extent (orange
Image
Illustrative maps showing the extent of widespread pyroclastic products fro...
Published: 01 February 2008
FIGURE 3 Illustrative maps showing the extent of widespread pyroclastic products from two New Zealand supereruptions. ( A ) Isopachs (lines of equal thickness) of fall deposits from the 26.5 ka Oruanui eruption. ( B ) Observed sites (red dots) and inferred original extent (orange
Journal Article
Published: 01 May 2011
Vadose Zone Journal (2011) 10 (2): 747–759.
... OI, Oruanui ignimbrite P1, Paleosol 1 P2, Paleosol 2 PID, proportional-integral-derivative TI, Taupo ignimbrite TDR, time domain reflectometry The design, installation, and evaluation of a vadose zone flux monitoring system is described. This system has 15 automated equilibrium...
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Journal Article
Journal: Geology
Published: 01 November 2013
Geology (2013) 41 (11): 1187–1190.
...Figure 2. A, B: Relative abundances of diatom species groups in lithic clasts extracted from proximal Oruanui (New Zealand) ignimbrite (A) and Oruanui fallout tephra (B), shown with increasing distance from source. Six species groups: i— Aulacoseira ambigua ; ii— Cyclostephanos novaezeelandiae...
FIGURES
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Textures of some pyroclastic deposits. ( A ) Typical proximal plinian fall ...
Published: 01 February 2008
FIGURE 2 Textures of some pyroclastic deposits. ( A ) Typical proximal plinian fall deposit (Oruanui, New Zealand). Note the uniformity of particle sizes, the particle angularity and the absence of fine-ash matrix, the result of winnowing in the high eruption plume. Darker fragments are lithic
Image
Textures of some pyroclastic deposits. ( A ) Typical proximal plinian fall ...
Published: 01 February 2008
FIGURE 2 Textures of some pyroclastic deposits. ( A ) Typical proximal plinian fall deposit (Oruanui, New Zealand). Note the uniformity of particle sizes, the particle angularity and the absence of fine-ash matrix, the result of winnowing in the high eruption plume. Darker fragments are lithic
Image
Textures of some pyroclastic deposits. ( A ) Typical proximal plinian fall ...
Published: 01 February 2008
FIGURE 2 Textures of some pyroclastic deposits. ( A ) Typical proximal plinian fall deposit (Oruanui, New Zealand). Note the uniformity of particle sizes, the particle angularity and the absence of fine-ash matrix, the result of winnowing in the high eruption plume. Darker fragments are lithic
Image
Magma storage conditions determined from (A) phase equilibria experiments a...
Published: 01 May 2013
and Fe-Ti–oxide thermometry (modified from Blundy and Cashman, 2001 ). Melt inclusion data are from early (open circles) and late (filled circles) phases of the Bishop Tuff ( Wallace et al., 1999 ) and Oruanui ( Liu et al., 2006 ) ignimbrites and Popocatepetl stratovolcano (solid diamonds; Atlas et al
Journal Article
Published: 01 June 2018
American Mineralogist (2018) 103 (6): 952–965.
... supereruptions that show field evidence for contrasting behavior at eruption onset: (1) 650 km 3 , 0.767 Ma Bishop Tuff, Long Valley; (2) 530 km 3 , 25.4 ka Oruanui eruption, Taupo; and (3) 2500 km 3 , 2.08 Ma Huckleberry Ridge Tuff, Yellowstone. During magma ascent, decompression causes volatile exsolution from...
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Journal Article
Journal: Interpretation
Published: 15 July 2016
Interpretation (2016) 4 (3): SJ87–SJ101.
... of volcanoclastic rocks of the Huka Falls Formation ( Chambefort et al., 2014 ), overlain by the Oruanui Formation ignimbrite ( Wilson, 2001 ; Manville and Wilson, 2004 ), a layer of loess and gravels ( Vucetich and Pullar, 1969 ), and ignimbrite from the CE 232 Taupo volcanic eruption ( Wilson, 1985 ; Hogg et al...
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Journal Article
Published: 01 May 2000
Journal of the Geological Society (2000) 157 (3): 537–552.
... ka Taupo ignimbrite formed during the climax of eruption Y ( Cole et al. 1998; J.W. Cole & R.M. Burt pers. comm. 1997), suggesting that the post‐Oruanui eruptions may have constructed a dome complex in the eastern part of Lake Taupo. Repose periods vary by more than two orders of magnitude from...
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Journal Article
Published: 01 January 2003
Journal of the Geological Society (2003) 160 (1): 3–6.
..., at 515 m ASL. This contrasts strongly with modern deformation rates, which, if extrapolated over 26 500 years, would place the post-26.5 ka shoreline close to modern lake level ( Fig. 3 ). Displacements on most Taupo Fault Belt faults immediately north of Lake Taupo offset the Oruanui ignimbrite surface...
FIGURES
Journal Article
Journal: Elements
Published: 01 August 2007
Elements (2007) 3 (4): 253–259.
...FIGURE 3 Feldspar from the Oruanui Ignimbrite, Taupo, New Zealand, showing isotopic variation from core to rim. The ignimbrite is 26,500 years old; so, given the low Rb/Sr of the feldspar, the ratios measured are initial ratios with no age correction necessary [analytical precision is about ±30...
FIGURES | View All (7)
Journal Article
Journal: Geology
Published: 01 October 2010
Geology (2010) 38 (10): 915–918.
... to the low proportion of radiogenic Pb. Nine grains contain <20% common Pb and yield ages of 0.21 ± 0.03 to 0.74 ± 0.06 Ma (uncertainties are 2σ). Most of the 23 listed Quaternary grains have ages similar to those from the 340 ka Whakamaru ignimbrite ( Fig. 3 ), erupted from a large caldera overlapping...
FIGURES
Journal Article
Journal: Geology
Published: 01 November 2015
Geology (2015) 43 (11): 947–950.
... diffusion profiles. We investigate three large-volume, high-silica rhyolite eruptions: the 240 ka Ohakuri-Mamaku and 26.5 ka Oruanui (Taupo Volcanic Zone, New Zealand), and the 760 ka Bishop Tuff (California, USA). Our results show that (1) longevity estimates from melt inclusion textures and Ti diffusion...
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