Journal article
Tectono-Thermal Evolution of the Hope-Kelly Fault System, Southern Alps, New Zealand: Insights From Topographic Analysis and (U-Th)/He Thermochronology
JL Vermeer, MC Quigley, SC Boone, BG Duffy, RM Langridge, BP Kohn
Journal of Geophysical Research Solid Earth | Published : 2023
DOI: 10.1029/2022JB024358
Abstract
The fast-slipping Alpine (∼30 mm/yr), Hope (∼10–20 mm/yr) and Kelly (∼6 mm/yr) faults in the South Island of New Zealand form a complex intersection zone that accommodates tectonic strain along the Australian-Pacific plate boundary. Analysis of digital topography reveals evidence for stream capture, drainage divide migration, landscape responses to incipient fault development, and preserved enclaves of relic topography that collectively reflect complex interplays between active faulting and landscape evolution. (U-Th)/He thermochronology of zircon (ZHe) and apatite (AHe) is used to investigate the low-temperature thermal evolution of rocks in the intersection zone. Weighted mean sample ages ..
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Awarded by California Department of Conservation
Funding Acknowledgements
J.V. acknowledges the support of a University of Melbourne International Research Scholarship and the Baragwanath Trust. R.M.L. was funded through GNS Science research projects TSZ and ZLD 2.2.2 South Island Paleoseismology, and the Alpine fault lidar acquisition was funded by the Natural Hazards Research Platform (NHRP). Additional funding for this research was provided through an Australian Research Council Discovery Project Grant (#DP170103350). Permits for sampling and field work were provided by the Department of Conservation (DOC). The authors thank Abaz Alimanovic for performing (U-Th)/He analysis. The University of Melbourne Thermochronology Laboratory receives support under the AuScope program of the National Collaborative Research Infrastructure Strategy (NCRIS). The authors thank Karl Lang, Florian Hofmann, and Rasmus Thiede for their constructive reviews. The authors thank the property owners Ed and Michelle Evans for access to their properties and for lodging and logistical support. The authors thank Andrew Wilson, Santosh Dhakal, Naomi Leclere, Mindi Curran, and Hector Flores for field assistance. The authors acknowledge the mana whenua of Ngati Waewae and Ngai Tahu as kaitiaki over Te Tai Poutini. Open access publishing facilitated by The University of Melbourne, as part of the Wiley - The University of Melbourne agreement via the Council of Australian University Librarians.