Job title: Associate Professor
Phone: +64 9 373 7599 x 87083
Office: Bldg 301 Rm 174
Postal: School of Environment, The University of Auckland, Private Bag 92019, Auckland
Email: pa.shane@auckland.ac.nz

Dr Shane studies the geology of volcanic regions. He is currently investigating the rhyolite eruptive history of the Okataina Volcanic Centre in central North Island. This program involves using the mineralogy and geochemistry of pyroclastic deposits to gain insight to pre-eruptive mechanisms such as triggering and magma-mixing. U-Th geochronology of zircons to assess magma longevity is also being investigated in collaboration with UCLA. New directions include the volcanic geology in the West Indies. The eruptive history of the basaltic Auckland Volcanic Field using tephra layers in ancient lake sediments is another current area of investigation. The purpose of that study is to assess past frequency and magnitude of eruptions for hazard analysis. Both projects are partly funded by FRST through sub-contracts with GNS Science. Other programs include the deep-sea tephra record from Kermadec arc volcanoes in collaboration with NIWA; and the dispersal of tephra in oceans surrounding New Zealand for the purposes of paleoceanography in collaboration with Rutgers University. Dr Shane is the Vice-president of the INQUA International Focus Group on Tephrochronology and Volcanism.

Research Activities

Magmatic processes at Tarawera and other rhyolite volcanoes.

Geochemistry and U-Th disequilibrium studies of zircon in collaboration with Dr Axel Schmitt (UCLA), Jan Lindsay (Auckland) and PhD student Sonja Storm.

Sonja Storm using the ion probe at UCLA. CL image of a zoned zircon crystal.

Tectonovolcanic setting of the early Miocene plate boundary in Northland

Collaboration with Dr Lorna Strachan (Auckland) and Mark Norman (ANU).

Eruption frequency of basaltic volcanic fields

Tephra in Auckland maar lake sediment cores with student Catherine Molloy.

Deep-sea tephra studies

2007 Kermadec Island deep-sea coring, NIWA vessel Tangaroa. Collaboration with Dr Ian Wright.

Liz Sikes (Rutgers University) and Phil examine sediment cores off North Island, onboard the Roger Revelle.

 

Storm, S., Shane, P., Schmitt, A.K., Lindsay, J.M. (2011) Contrasting punctuated zircon growth in two syn-erupted rhyolite magmas from Tarawera volcano: insights to crystal diversity in magmatic systems. Earth and Planetary Science Letters 301, 511-520, doi:10.1016/j.epsl.2010.11.034.

Shane, P., Strachan, L.J., Smith, I. (2010) Redefining the Waitemata Basin, New Zealand: A new tectonic, magmatic, and basin evolution model at a subduction terminus in the SW Pacific. Geochemistry Geophysics Geosystems, doi:10.1029/2009GC002798

Rose , K.A., Sikes, E.L., Guilderson, T.P., Shane, P., Hill, T.M., Zahn, R., Spero, H.J. (2010) Upper-ocean-to-atmosphere radiocarbon offsets imply fast deglacial carbon dioxide release. Nature 466, 1093-10797, doi:10.1038/nature09288

Smith, V., Shane, P., Nairn, I. (2010) Insights into silicic melt generation using plagioclase, quartz and melt inclusions from the caldera-forming Rotoiti eruption, Taupo Volcanic Zone, New Zealand. Contributions to Mineralogy and Petrology 160, 951-971. DOI 10.1007/s00410-010-0516-0

Molloy, C., Shane, P., Augustinus, P., (2009) Eruption recurrence rates in a basaltic volcanic field based on tephra layers in maar sediments:implications for hazards in the Auckland Volcanic Field. Geological Society of America Bulletin 121, 1666-1677. DOI: 10.1130/B26447.1

Shane, P., Smith, V., Nairn, I., 2008. Millennial timescale resolution of rhyolite magma recharge at Tarawera volcano: insights from quartz chemistry and melt inclusions. Contributions to Mineralogy & Petrology 156, 397-411.

Augustinus, P., Bleakley, N., Deng, Y., Shane, P., Cochran, U., 2008. Rapid change in early Holocene environments inferred from Lake Pupuke, Auckland City, New Zealand. Journal of Quaternary Science 23, 435-447.

Shane, P., Nairn, I.A., Smith, V.C., Darragh, M.B., Beggs, K.F., Cole, J.W., 2008. Silicic recharge of multiple rhyolite magmas by basaltic intrusion during the 22.6 ka Okareka Eruption Episode, New Zealand. Lithos 103, 527-549.

Molloy, C., Shane, P., Nairn, I., 2008. Pre-eruption thermal rejuvenation and stirring of a partly crystalline rhyolite pluton revealed by the Earthquake Flat Pyroclastics deposits, New Zealand. Journal of the Geological Society, London 165, 435-447.

Shane, P., Doyle, L.R., Nairn, I.A., 2008. Heterogeneous andesite-dacite ejecta in 26-16.6 ka pyroclastic deposits of Tongariro volcano, New Zealand: the product of multiple magma-mixing events. Bulletin of Volcanology 70, 517-536.

Shane, P., Nairn, I., Martin, S., Smith, V., 2008. Compositional heterogeneity in tephra deposits resulting from the eruption of multiple magma bodies: implications for tephrochronology. Quaternary International 178, 44-53.

Lowe, D.J., Shane, P.A.R., Alloway, B.V., Newnham, R.W., 2008. Fingerprints and age models for widespread New Zealand tephra marker beds erupted since 30,000 yr ago as a framework for NZ-INTIMATE. Quaternary Science Reviews 27, 95-126.

Current PhD students (primary supervisor):

Aleksandra Zawalna-Geer, Microtephra in Auckland lake sediments

Sonja Storm, Zircon chronology of Tarawera rhyolites

Louise Doyle, Geochemistry of Mangaone pyroclastic deposits

Tracy Howe, Zircon chronology of West Indies volcanoes

(co-supervisor with Dr Strachan):

Chrissie Fildes, Megaturbidites in the Waitemata basin