Imperial College London
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DrRebeccaBell

Faculty of Engineering, Department of Earth Science & Engineering

Reader in Tectonics
 
 
 
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Contact

 

+44 (0)20 7594 0903rebecca.bell

 
 
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Location

 

2.37aRoyal School of MinesSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Cook:2020:10.1029/2020gl088474,
author = {Cook, AE and Paganoni, M and Clennell, MB and McNamara, DD and Nole, M and Wang, X and Han, S and Bell, RE and Solomon, EA and Saffer, DM and Barnes, PM and Pecher, IA and Wallace, LM and LeVay, LJ and Petronotis, KE},
doi = {10.1029/2020gl088474},
journal = {Geophysical Research Letters},
pages = {1--11},
title = {Physical properties and gas hydrate at a nearseafloor thrust fault, hikurangi margin, New Zealand},
url = {http://dx.doi.org/10.1029/2020gl088474},
volume = {47},
year = {2020}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - The Ppaku Fault Zone, drilled at International Ocean Discovery Program (IODP) Site U1518, is an active splay fault in the frontal accretionary wedge of the Hikurangi Margin. In loggingwhiledrilling data, the 33mthick fault zone exhibits mixed modes of deformation associated with a trend of downward decreasing density, Pwave velocity, and resistivity. Methane hydrate is observed from ~30 to 585 m below seafloor (mbsf), including within and surrounding the fault zone. Hydrate accumulations are vertically discontinuous and occur throughout the entire logged section at low to moderate saturation in silty and sandy centimeterthick layers. We argue that the hydrate distribution implies that the methane is not sourced from fluid flow along the fault but instead by local diffusion. This, combined with geophysical observations and geochemical measurements from Site U1518, suggests that the fault is not a focused migration pathway for deeply sourced fluids and that the nearseafloor Ppaku Fault Zone has little to no active fluid flow.
AU  - Cook,AE
AU  - Paganoni,M
AU  - Clennell,MB
AU  - McNamara,DD
AU  - Nole,M
AU  - Wang,X
AU  - Han,S
AU  - Bell,RE
AU  - Solomon,EA
AU  - Saffer,DM
AU  - Barnes,PM
AU  - Pecher,IA
AU  - Wallace,LM
AU  - LeVay,LJ
AU  - Petronotis,KE
DO  - 10.1029/2020gl088474
EP  - 11
PY  - 2020///
SN  - 0094-8276
SP  - 1
TI  - Physical properties and gas hydrate at a nearseafloor thrust fault, hikurangi margin, New Zealand
T2  - Geophysical Research Letters
UR  - http://dx.doi.org/10.1029/2020gl088474
UR  - https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2020GL088474
UR  - http://hdl.handle.net/10044/1/83011
VL  - 47
ER  -
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