Journal article
Late Holocene rupture behavior and earthquake chronology on the Hope fault, New Zealand
N Khajavi, RM Langridge, MC Quigley, C Smart, A Rezanejad, F Martín-González
Bulletin of the Geological Society of America | GEOLOGICAL SOC AMER, INC | Published : 2016
DOI: 10.1130/B31199.1
Abstract
The Hope fault is the most active and southernmost splay of the Marlborough fault system in the northern South Island of New Zealand. The fault consists of five geometrically defined segments. We used trenching to acquire paleoseismic data and radiocarbon dating of faulted late Holocene sediments on the Hurunui segment of the Hope fault to derive an earthquake chronology that extends from the historic 1888 Mw 7.1 Amuri earthquake to ca. 300 C.E., thereby providing the longest chronologic record of earthquakes on the Hope fault to date. Earthquake event horizons were identified by upward fault terminations, colluvial wedges, unconformities, and/or progressive folding of shutter basin deposits..
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Funding Acknowledgements
We wish to thank New Zealand Natural Hazards Research Platform for funding the light detection and ranging (LiDAR) project. We thank the Department of Geological Sciences, University of Canterbury, GHZ Paleoseismicity (GNS Science), and the New Zealand Earthquake Commission (EQC) for funding this research. We thank the Department of Conservation and the owner of Poplar Station, Kevin Henderson, for site access. We acknowledge Stefan Winkler for providing a Schmidt hammer and related academic discussions. We thank Sam McColl for reviewing this work and giving constructive comments. We acknowledge the reviewers and editors for their constructive comments to improve the manuscript. We also thank David Norton and Jarg Pettinga for their advice on dendrochronology and fault behavior.