Hunter Fracture Zone
Hunter Fracture Zone | |
---|---|
Etymology |
The Hunter Fracture Zone is a sinistral (left-lateral) transform faulting fracture zone,[1] that to its south is part of a triple junction with the New Hebrides Trench, and the North Fiji Basin Central Spreading Ridge.[2] The Hunter Fracture Zone, with the Hunter Ridge, an area with recent volcanic activity to its north, is the southern boundary of the North Fiji Basin.[3] This boundary area in the south-western part of the Hunter Fracture Zone is associated with hot subduction, and a unique range of volcanic geochemistry.[4]
Geography
The Hunter Fracture Zone is located to the south and southwest of Fiji and starts where the southern part of the New Hebrides Trench ends due to the increasing obliqueness of convergence lending to more strike slip faulting than subducting. It terminates around the International Date Line, with the Kadavu Islands immediately to its north.[5] However some earlier work has postulated that the fault structures around Suva on Fiji itself are related and different authors have defined the zone variably.[6]
Seismicity
The western Hunter Fracture Zone is an area of fair shallow seismicity.[7] Large (more than Mw6) earthquakes have occurred in historic times.[8]
Tectonics
It defines part of the
See also
References
- ^ a b Durance et al. 2012, p915
- ^ Durance et al. 2012, p929
- S2CID 53477063.
- ^ Durance et al. 2012, p929
- S2CID 129542546.
- .
- ISBN 9783642850431. Retrieved 4 July 2023.
- ^ "Seismotectonics of the Eastern Margin of the Australia Plate" (PDF). Retrieved 3 July 2023.
- ^ McCarthy et al. 2022, 1. Introduction.
- ^ McCarthy et al. 2022, 2.1. The Vanuatu – Hunter Ridge subduction system.
- Sources
- Durance, PM; Jadamec, MA; Falloon, TJ; Nicholls, IA (1 August 2012). "Magmagenesis within the Hunter Ridge Rift Zone resolved from olivine-hosted melt inclusions and geochemical modelling with insights from geodynamic models". Australian Journal of Earth Sciences. 59 (6): 913–31. S2CID 67848457.
- McCarthy, A; Falloon, TJ; Danyushevsky, LV; Sauermilch, I; Patriat, M; Jean, MM; Maas, R; Woodhead, JD; Yogodzinski, GM (15 July 2022). "Implications of high-Mg# adakitic magmatism at Hunter Ridge for arc magmatism of the Fiji-Vanuatu region". Earth and Planetary Science Letters. 590 (117592). .