Browsing by Author "Wilson CJN"

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    Mahi Tahi - Rū Whenua: Tangata Whenua & Kairangahau Pūtaiao. Reflective Learnings on Partnering With Indigenous Māori Communities in Field-Based Scientific Research
    (Wiley Periodicals LLC on behalf of American Geophysical Union, 2025-04-16) Mestel ERH; Smith B; Tapuke K; Illsley-Kemp F; Kaiser L; Connon I; Johnston D; Wilson CJN; Leonard G; Clive MAT; Savage MK
    Between 2018 and 2022, representatives of local Indigenous Māori communities and emergency management worked in partnership with physical and social scientists during the planning, deployment, and management of a temporary seismometer network around Taupō volcano. This deployment formed part of the Eruption or Catastrophe: Learning to Implement Preparedness for future Supervolcano Eruptions (ECLIPSE) project designed to increase understanding of the large caldera volcanoes in the central North Island of Aotearoa New Zealand. Here we critically reflect on this co-production approach to geophysical network deployment and associated volcano research. We identified a central theme of the creating and holding of space for researchers and communities to engage in the activities through adopting a co-production approach, that embeds representatives of local Iwi (tribal groups) Te Arawa and Ngāti Tūwharetoa as key researchers within a broad project team. We worked to ensure we were respecting communities' time, protocols, and decisions; and to exchange knowledge about the research and results with landowners, community leaders, schools, and young people. Time spent kanohi ki te kanohi (face-to-face) built relationships and trust within and outside the research team that have lasted beyond the scope of the ECLIPSE program. We detail our experiences in the hope of demonstrating that this approach to research is a possible and desirable path for future fieldwork-based research.
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    Ruapehu and Tongariro stratovolcanoes: a review of current understanding
    (Taylor and Francis Group on behalf of GNS Science Ltd, 2021-05-02) Leonard GS; Cole RP; Christenson BW; Conway CE; Cronin SJ; Gamble JA; Hurst T; Kennedy BM; Miller CA; Procter JN; Pure LR; Townsend DB; White JDL; Wilson CJN
    Ruapehu (150 km3 cone, 150 km3 ring-plain) and Tongariro (90 km3 cone, 60 km3 ring-plain) are iconic stratovolcanoes, formed since ∼230 and ∼350 ka, respectively, in the southern Taupo Volcanic Zone and Taupo Rift. These volcanoes rest on Mesozoic metasedimentary basement with local intervening Miocene sediments. Both volcanoes have complex growth histories, closely linked to the presence or absence of glacial ice that controlled the distribution and preservation of lavas. Ruapehu cone-building vents are focused into a short NNE-separated pair, whereas Tongariro vents are more widely distributed along that trend, the differences reflecting local rifting rates and faulting intensities. Both volcanoes have erupted basaltic andesite to dacite (53–66 wt.% silica), but mostly plagioclase-two pyroxene andesites from storage zones at 5–10 km depth. Erupted compositions contain evidence for magma mixing and interaction with basement rocks. Each volcano has an independent magmatic system and a growth history related to long-term (>104 years) cycles of mantle-derived magma supply, unrelated to glacial/interglacial cycles. Historic eruptions at both volcanoes are compositionally diverse, reflecting small, dispersed magma sources. Both volcanoes often show signs of volcanic unrest and have erupted with a wide range of styles and associated hazards, most recently in 2007 (Ruapehu) and 2012 (Tongariro).