Paleoseismology of the Hyde Fault, Otago, New Zealand
We present the first paleoseismic investigation of the Hyde Fault, one of a series of north-east striking reverse faults within the Otago range and basin province in southern New Zealand. Surface traces of the fault and associated geomorphology were mapped using a lidar digital elevation model and field investigations. Trenches were excavated at two sites across fault scarps on alluvial fan surfaces. The trenches revealed stratigraphic evidence for four surface-rupturing earthquakes. Optically stimulated luminescence dating constrains the timing of these events to around 47.2 ka (37.5–56.7 ka at 95% confidence), 34.6 ka (24.7–46.4 ka),23.5 ka (19.7–27.3 ka) and 10.5 ka (7.9–13.1 ka). We obtain a mean inter-event time of12.4 kyr (2.3–23.9 kyr at 95% confidence) and the slip rate is estimated to be 0.22 mm/yr (0.15–0.3 mm/yr). We do not find evidence to suggest that earthquake recurrence on the Hyde Fault is episodic, in contrast to other well-studied faults within Otago, suggesting diverse recurrence styles may co-exist in the same fault system. This poses challenges for characterising the seismic hazard potential of faults in the region, particularly when paleoearthquake records are limited to the most recent few events.
<b>Citation:</b> Jonathan D. Griffin, Mark W. Stirling, David J.A. Barrell, Ella J. van den Berg, Erin K. Todd, Ross Nicolls & Ningsheng Wang (2022) Paleoseismology of the Hyde Fault, Otago, New Zealand, <i>New Zealand Journal of Geology and Geophysics</i>, 65:4, 613-637, DOI: 10.1080/00288306.2021.1995007
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- Date (Creation)
- 2021-07-28T09:07:00
- Date (Publication)
- 2024-03-20T05:50:59
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Digital Object Identifier
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Role Organisation / Individual Name Details Author Griffin, J.
PSCD Internal Contact Author Stirling, M.
External Contact Author Barrell, D.J.A.
External Contact Author van den Berg, E.
External Contact Author Todd, E.K.
External Contact Author Nicolls, R.
External Contact Author Wang, N.
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New Zealand Journal of Geology and Geophysics
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Volume 65, Issue 4, 2022
- Page
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613-634
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Manuscript for publication in the New Zealand Journal of Geology and Geophysics
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EARTH SCIENCES
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Paleoseismology
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- Keywords
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Hyde fault
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- Keywords
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reverse faulting
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Otago range and basin
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- Keywords
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earthquake recurrence
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seismic hazard
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© 2022 The Author(s)
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Manuscript for publication in the New Zealand Journal of Geology and Geophysics
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Australian Government Security Classification System
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urn:uuid/d885d0ea-0372-46b0-b867-b7146698e2d9
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GeoNetwork UUID
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Role Organisation / Individual Name Details Point of contact Commonwealth of Australia (Geoscience Australia)
Voice Owner Allen, T
Internal Contact Point of contact Griffin, J.
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Journal Article
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- 2019-04-08T01:55:29
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- 2019-04-08T01:55:29
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AU/NZS ISO 19115-1:2014
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ISO 19115-1:2014
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ISO 19115-3
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Geoscience Australia Community Metadata Profile of ISO 19115-1:2014
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Version 2.0, September 2018
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