The Significance of Heat Transport by Shallow Fluid Flow at an Active Plate Boundary

The Southern Alps, New Zealand

Jamie Coussens (Corresponding Author), Nicolas Woodman, Phaedra Upton, Catriona Menzies, Lucie Janku-Capova, Rupert Sutherland, Damon A. H. Teagle (Corresponding Author)

Research output: Contribution to journalArticle

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Abstract

Fluid flow can influence fault behavior. Here we quantify the role of groundwater heat advection in establishing the thermal structure of the Alpine Fault, a major tectonic boundary in southern New Zealand that accommodates most of the motion between the Australian and Pacific Plates. Convergence on the Alpine Fault has rapidly uplifted the Southern Alps, resulting in high geothermal gradients and a thin seismogenic zone. A new equilibrium temperature profile from the 818-m-deep Deep Fault Drilling Project 2B borehole has been interrogated using one-dimensional analytical models of fluid and rock advection. Models indicate a total heat flux of 720-mW m2 results from groundwater flow with Darcy velocities approximating to 7.8 × 1010 m s1. Groundwaters advect significantly more heat than rock advection in the shallow orogen (<6-km depth) and are the major control on the subsurface temperature field.
Original languageEnglish
Pages (from-to)10,323-10,331
Number of pages8
JournalGeophysical Research Letters
Volume45
Issue number19
Early online date5 Oct 2018
DOIs
Publication statusPublished - 16 Oct 2018

Fingerprint

New Zealand
ground water
advection
plate boundary
fluid flow
heat
rocks
boreholes
drilling
Australian plate
temperature profiles
groundwater
heat flux
tectonics
geothermal gradient
Pacific plate
temperature distribution
thermal structure
temperature profile
rock

Keywords

  • hydrogeology
  • Alpine Fault
  • Southern Alps
  • mountain belt
  • fluid flow
  • heat flow

Cite this

Coussens, J., Woodman, N., Upton, P., Menzies, C., Janku-Capova, L., Sutherland, R., & Teagle, D. A. H. (2018). The Significance of Heat Transport by Shallow Fluid Flow at an Active Plate Boundary: The Southern Alps, New Zealand. Geophysical Research Letters, 45(19), 10,323-10,331. https://doi.org/10.1029/2018GL078692

The Significance of Heat Transport by Shallow Fluid Flow at an Active Plate Boundary : The Southern Alps, New Zealand. / Coussens, Jamie (Corresponding Author); Woodman, Nicolas; Upton, Phaedra; Menzies, Catriona; Janku-Capova, Lucie; Sutherland, Rupert; Teagle, Damon A. H. (Corresponding Author).

In: Geophysical Research Letters, Vol. 45, No. 19, 16.10.2018, p. 10,323-10,331.

Research output: Contribution to journalArticle

Coussens, J, Woodman, N, Upton, P, Menzies, C, Janku-Capova, L, Sutherland, R & Teagle, DAH 2018, 'The Significance of Heat Transport by Shallow Fluid Flow at an Active Plate Boundary: The Southern Alps, New Zealand', Geophysical Research Letters, vol. 45, no. 19, pp. 10,323-10,331. https://doi.org/10.1029/2018GL078692
Coussens, Jamie ; Woodman, Nicolas ; Upton, Phaedra ; Menzies, Catriona ; Janku-Capova, Lucie ; Sutherland, Rupert ; Teagle, Damon A. H. / The Significance of Heat Transport by Shallow Fluid Flow at an Active Plate Boundary : The Southern Alps, New Zealand. In: Geophysical Research Letters. 2018 ; Vol. 45, No. 19. pp. 10,323-10,331.
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abstract = "Fluid flow can influence fault behavior. Here we quantify the role of groundwater heat advection in establishing the thermal structure of the Alpine Fault, a major tectonic boundary in southern New Zealand that accommodates most of the motion between the Australian and Pacific Plates. Convergence on the Alpine Fault has rapidly uplifted the Southern Alps, resulting in high geothermal gradients and a thin seismogenic zone. A new equilibrium temperature profile from the 818-m-deep Deep Fault Drilling Project 2B borehole has been interrogated using one-dimensional analytical models of fluid and rock advection. Models indicate a total heat flux of 720-mW m2 results from groundwater flow with Darcy velocities approximating to 7.8 × 1010 m s1. Groundwaters advect significantly more heat than rock advection in the shallow orogen (<6-km depth) and are the major control on the subsurface temperature field.",
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