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dc.contributor.authorLoame, Remedy C.en_NZ
dc.contributor.authorVillamor, Pilaren_NZ
dc.contributor.authorLowe, David J.en_NZ
dc.contributor.authorMilicich, Sarah D.en_NZ
dc.contributor.authorPittari, Adrianen_NZ
dc.contributor.authorBarker, Shaun L.L.en_NZ
dc.contributor.authorRae, Andrewen_NZ
dc.contributor.authorGomez-Vasconcelos, Martha G.en_NZ
dc.contributor.authorMartinez-Martos, Manuelen_NZ
dc.contributor.authorRies, William F.en_NZ
dc.date.accessioned2019-10-23T01:30:26Z
dc.date.available2019-01-01en_NZ
dc.date.available2019-10-23T01:30:26Z
dc.date.issued2019en_NZ
dc.identifier.citationLoame, R. C., Villamor, P., Lowe, D. J., Milicich, S. D., Pittari, A., Barker, S. L. L., … Ries, W. F. (2019). Using paleoseismology and tephrochronology to reconstruct fault rupturing and hydrothermal activity since c. 40 ka in Taupo Rift, New Zealand. Quaternary International, 500, 52–70. https://doi.org/10.1016/j.quaint.2019.02.031en
dc.identifier.issn1040-6182en_NZ
dc.identifier.urihttps://hdl.handle.net/10289/13012
dc.description.abstractThe Taupo Volcanic Zone (TVZ) in North Island, New Zealand, is the on-land continuation of the Tonga-Kermadec arc formed in the Quaternary at the obliquely convergent boundary of the Pacific and Australian tectonic plates. The central TVZ is a region of intense silicic volcanism and active rifting with a very high heat flux. Within this zone is a dynamic landscape affected by a dense, active fault network, the Taupo Rift. In this rift, the Ngakuru graben hosts fossil hydrothermal systems in an area parallel to numerous active faults including the east strand of Whirinaki Fault that forms a major structure. Using various geoscientific techniques including mapping, stratigraphy, paleoseismic trenching, and tephrostratigraphy, in conjunction with LiDAR-derived DEMs, we reconstruct and date the fault's rupture history along with hydrothermal activity (including silica-sinter development) since c. 40,000 calendar years ago (40 cal. ka) at a site near Hossack Road called “Meade”. Ages for Kawakawa (c. 25.4 cal. ka), Okareka (c. 21.8 cal. ka), Rotorua (c.15.6 cal. ka), Rotoma (c. 9.4 cal. ka), and Taupo (c. 1.7 cal. ka) tephras enabled us to date five identified fault rupture events using the Meade trench excavation. Slip rates of 2.66 ± 0.77 mm/yr (pre-Kawakawa tephra), 0.28 ± 0.04 mm/yr (between c. 25.4 ka and Taupo) and 0.51 ± 0.19 mm/yr (post-Taupo), and the recurrence interval of ∼5500 cal. yr during the last c. 25.4 cal. kyr, all correlate with events of similar ages determined from studies on other trenches on Whirinaki Fault. Intercalated with Tahuna tephra (c. 39.3 cal. ka) and additionally dated at c. 38.9 cal. ka using radiocarbon, the hydrothermal sinter began developing at the Meade site at c. 39 cal. ka and ceased by c. 21.8 cal. ka (marked by Okareka tephra). We examine the causative relationship between fault activity and the development of sinter by comparing the chronology of volcanic eruptions and fault rupturing events with that of sinter formation as recorded in three neighbouring sites, Mangatete, Matthews, and Fitzpatrick. The findings improve understanding of the complex rupture behaviour of faulting and provide evidence for relationships between tectonic and hydrothermal activities, which were additionally influenced by the impacts of climatic change and geomorphic processes on landscape evolution, within the late Quaternary period. The study also exemplifies the unique value of tephrochronology in helping to disentangle complex geological deposits and events in an extremely dynamic part of the Earth's surface (the Taupo Rift).
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dc.format.mimetypeapplication/pdf
dc.format.mimetypeapplication/pdf
dc.language.isoenen_NZ
dc.publisherPergamon-Elsevier Science Ltden_NZ
dc.rightsThis article is published in the Quaternary International © 2019 Elsevier Ltd and INQUA.. Used with permission.
dc.subjectScience & Technologyen_NZ
dc.subjectPhysical Sciencesen_NZ
dc.subjectGeography, Physicalen_NZ
dc.subjectGeosciences, Multidisciplinaryen_NZ
dc.subjectPhysical Geographyen_NZ
dc.subjectGeologyen_NZ
dc.subjectTephrostratigraphyen_NZ
dc.subjectActive normal faulten_NZ
dc.subjectPaleoseismologyen_NZ
dc.subjectGeothermal sinteren_NZ
dc.subjectVolcanismen_NZ
dc.subjectLate Quaternaryen_NZ
dc.subjectOKATAINA-VOLCANIC-CENTERen_NZ
dc.subjectLAST GLACIAL MAXIMUMen_NZ
dc.subjectCENTRAL NORTH-ISLANDen_NZ
dc.subjectSTRUCTURAL EVOLUTIONen_NZ
dc.subjectSURFACE RUPTUREen_NZ
dc.subjectTEPHRA DEPOSITSen_NZ
dc.subjectROTOITI-BRECCIAen_NZ
dc.subjectMAGMA STORAGEen_NZ
dc.subjectSILICA SINTERen_NZ
dc.subjectROTOEHU ASHen_NZ
dc.titleUsing paleoseismology and tephrochronology to reconstruct fault rupturing and hydrothermal activity since c. 40 ka in Taupo Rift, New Zealanden_NZ
dc.typeJournal Article
dc.identifier.doi10.1016/j.quaint.2019.02.031en_NZ
dc.relation.isPartOfQuaternary Internationalen_NZ
pubs.begin-page52
pubs.elements-id235893
pubs.end-page70
pubs.publication-statusPublisheden_NZ
pubs.volume500en_NZ
dc.identifier.eissn1873-4553en_NZ


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