The Anatomy of an Andesite Volcano: a Time–Stratigraphic Study of Andesite Petrogenesis and Crustal Evolution at Ruapehu Volcano, New Zealand

Price, Richard; Gamble, J. A.; Smith, I. E.; Maas, Roland; Waight, Tod E.; Stewart, Robert B.; Woodhead, Jon

doi:10.1093/petrology/egs050

Cited by 121 publications

(166 citation statements)

References 132 publications

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“…7) and thus significantly more evolved than the whole-rock composition. This is consistent with recent findings for a much broader suite of rocks from Ruapehu (Price et al 2012) and for andesitic systems globally (Reubi & Blundy 2009). Representative results for groundmass glass and melt inclusion compositions are given in the supplementary files.…”

Section: Groundmass Glass Compositions and Melt Inclusionssupporting

confidence: 92%

“…The values obtained here lie generally within the range of those reported by Price et al (2012), who estimated crystallisation pressure range (using the same thermobarometer) of 0.2Á1 GPa for Ruapehu's Te Herenga andesites, and Deering et al (2011). We also note that errors on these estimates will be significant.…”

Section: Pyroxene Barometrysupporting

confidence: 89%

“…1). The construction of its large composite edifice occurred over several episodes of growth since c. 250 ka (Price et al 2012). Frequent sub-Plinian eruptions are characteristic of Ruapehu's recent history following a series of regional climactic Plinian eruptions c. 10 ka ago.…”

Section: Introductionmentioning

confidence: 99%

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Petrological record from young Ruapehu eruptions in the 4.5 ka Kiwikiwi Formation, Whangaehu Gorge, New Zealand

Auer

White

Nakagawa

et al. 2013

New Zealand Journal of Geology and Geophysics

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A petrological study of the Kiwikiwi Formation from Mount Ruapehu is presented. We apply mineral thermobarometry to investigate the volcano's plumbing system and the petrogenesis of the Kiwikiwi andesite. The earliest petrographic record is preserved in rare orthopyroxeneÁplagioclase (X An 85) glomerocrysts and scarce highly resorbed olivine. A traverse of the magma through an extensive crustal mush column resulted in crystallisation of a two pyroxeneÁplagioclase andesite. Complex mineral zonation and a large range of glass composition was the result of the frequent intrusion of small magma batches into the system. The range of mineral and end-member liquid compositions suggest that crystallisation commenced at c. 25 km depth. Subsequent ascent through the crust added considerable textural complexities but resulted in only little net loss to cumulate phases. The last magma storage occurred at crustal levels of c. 5 km depth prior to the eruption of a highly porphyritic andesitic magma.

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Section: Groundmass Glass Compositions and Melt Inclusionssupporting

confidence: 92%

Section: Pyroxene Barometrysupporting

confidence: 89%

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Petrological record from young Ruapehu eruptions in the 4.5 ka Kiwikiwi Formation, Whangaehu Gorge, New Zealand

Auer

White

Nakagawa

et al. 2013

New Zealand Journal of Geology and Geophysics

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“…1; Eaves, 2015). Further constraints on the timing of moraine formation and ice extent at the LGM are provided by the age and distribution of pre-, syn-, and post-LGM lava flow emplacement (Hobden et al, 1996;Gamble et al, 2003;Price et al, 2012;Conway et al, 2015;Conway et al, 2016) and the stratigraphic relationship of these flows to both moraines and glaciated valleys.…”

Section: Last Glacial Maximum Ice Extent In the Central North Islandmentioning

confidence: 99%

“…For example, compilation of existing mapping (e.g. Gamble et al, 2003;Townsend et al, 2008;Price et al, 2012, Fig. 1), together with extensive field mapping and new radiometric dating, has been used to produce 1 : 60 000 scale maps of the volcanic geology, which delineate individual lava flows .…”

Section: Experiments 3: Palaeo-topographymentioning

confidence: 99%

The Last Glacial Maximum in the central North Island, New Zealand: palaeoclimate inferences from glacier modelling

et al. 2016

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Abstract. Quantitative palaeoclimate reconstructions provide data for evaluating the mechanisms of past, natural climate variability. Geometries of former mountain glaciers, constrained by moraine mapping, afford the opportunity to reconstruct palaeoclimate, due to the close relationship between ice extent and local climate. In this study, we present results from a series of experiments using a 2-D coupled energy balance-ice flow model that investigate the palaeoclimate significance of Last Glacial Maximum moraines within nine catchments in the central North Island, New Zealand. We find that the former ice limits can be simulated when present-day temperatures are reduced by between 4 and 7 • C, if precipitation remains unchanged from present. The spread in the results between the nine catchments is likely to represent the combination of chronological and model uncertainties. The majority of catchments targeted require temperature decreases of 5.1 to 6.3 • C to simulate the former glaciers, which represents our best estimate of the temperature anomaly in the central North Island, New Zealand, during the Last Glacial Maximum. A decrease in precipitation of up to 25 % from present, as suggested by proxy evidence and climate models, increases the magnitude of the required temperature changes by up to 0.8 • C. Glacier model experiments using reconstructed topographies that exclude the volume of post-glacial (< 15 ka) volcanism generally increased the magnitude of cooling required to simulate the former ice limits by up to 0.5 • C. Our palaeotemperature estimates expand the spatial coverage of proxy-based quantitative palaeoclimate reconstructions in New Zealand. Our results are also consistent with independent, proximal temperature reconstructions from fossil groundwater and pollen assemblages, as well as similar glacier modelling reconstructions from the central Southern Alps, which suggest air temperatures were ca. 6 • C lower than present across New Zealand during the Last Glacial Maximum.

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Metasomatized ancient lithospheric mantle beneath the young Zealandia microcontinent and its role in HIMU-like intraplate magmatism

Scott

Waight²,

Meer³

et al. 2014

Geochem. Geophys. Geosyst.

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There has been long debate on the asthenospheric versus lithospheric source for numerous intraplate basalts with ocean island basalt (OIB) and high time-integrated U/Pb (HIMU)-like source signatures that have erupted through the Zealandia continental crust. Analysis of 157 spinel facies peridotitic mantle xenoliths from 25 localities across Zealandia permits the first comprehensive regional description of the subcontinental lithospheric mantle (SCLM) and insights into whether it could be a source to the intraplate basalts. Contrary to previous assumptions, the Oligocene-Miocene Zealandia SCLM is highly heterogeneous. It is composed of a refractory craton-like domain (West Otago) adjacent to several moderately fertile domains (East Otago, North Otago, Auckland Islands). Each domain has an early history decoupled from the overlying Carboniferous and younger continental crust, and each domain has undergone varying degrees of depletion followed by enrichment. Clinopyroxene grains reveal trace element characteristics (low Ti/Eu, high Th/U) consistent with enrichment through reaction with carbonatite. This metasomatic overprint has a composition that closely matches HIMU in Sr, Pb 6 Nd isotopes. However, clinopyroxene Hf isotopes are in part highly radiogenic and decoupled from the other isotope systems, and also mostly more radiogenic than the intraplate basalts. If the studied spinel facies xenoliths are representative of the thin Zealandia SCLM, the melting of garnet facies lithosphere could only be the intraplate basalt source if it had a less radiogenic Hf-Nd isotope composition than the investigated spinel facies, or was mixed with asthenosphere-derived melts containing less radiogenic Hf.

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The Anatomy of an Andesite Volcano: a Time–Stratigraphic Study of Andesite Petrogenesis and Crustal Evolution at Ruapehu Volcano, New Zealand

Cited by 121 publications

References 132 publications

Petrological record from young Ruapehu eruptions in the 4.5 ka Kiwikiwi Formation, Whangaehu Gorge, New Zealand

Petrological record from young Ruapehu eruptions in the 4.5 ka Kiwikiwi Formation, Whangaehu Gorge, New Zealand

The Last Glacial Maximum in the central North Island, New Zealand: palaeoclimate inferences from glacier modelling

Metasomatized ancient lithospheric mantle beneath the young Zealandia microcontinent and its role in HIMU-like intraplate magmatism

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