RT Journal Article
T1 Rupture history of the whirinaki fault, an active normal fault in the taupo rift, New Zealand
A1 Canora Catalán, Carolina
A1 Villamor Pérez, María Pilar
A1 Berryman, K.R.
A1 Martínez Díaz, José Jesús
A1 Raen, Tracey
AB Trenching of two fault strands that form part of the 21 km long, and up to 2 km wide Whirinaki Fault, Taupo Rift, New Zealand, shows that surface fault rupture has occurred at least eight times during the past 26.5 kyr. Single-event displacements on each strand vary from a few decimetres to perhaps >2.5 m. Fault trace mapping, geomorphic analysis, and paleoseismic studies indicate a maximum magnitude for the Whirinaki Fault of c. Mw 6.6, with a recurrence interval of between 1000 and 4000 yr. The variability of single-event displacement and timing of rupture on the two strands is attributed to various unsegmented and segmented rupture modes. Airfall tephra revealed in the trenches span the past 26.5 kyr, and provide time horizons to enable interpretation of how slip has accumulated on each of the strands of the fault. Temporal variation in slip rate ranges from 0.3 to 1.5 mm/yr and is indicative of spatial and temporal changes in the locus of strain in the Taupo Rift and the interdependence of the displacement rates and paleoearthquakes in the area.
PB Royal Society of New Zealand
SN 0028-8306
YR 2008
FD 2008-12
LK https://hdl.handle.net/20.500.14352/88268
UL https://hdl.handle.net/20.500.14352/88268
LA eng
NO Foundation for Research, Science and Technology
DS Docta Complutense
RD 9 abr 2025