Submarine canyon systems focusing sub-surface fluid in the Canterbury Basin, South Island, New Zealand

Abstract This work uses a high-quality 3D seismic volume from offshore Canterbury Basin, New Zealand, to investigate how submarine canyon systems can focus sub-surface fluid. The seismic volume was structurally conditioned to improve the contrast in seismic reflections, preserving their lateral cont...

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Autores principales:	Priyadarshi Chinmoy Kumar, Tiago M. Alves, Kalachand Sain
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/d5d45f768cd64a8b82888db10988864a
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spelling	oai:doaj.org-article:d5d45f768cd64a8b82888db10988864a2021-12-02T18:51:52ZSubmarine canyon systems focusing sub-surface fluid in the Canterbury Basin, South Island, New Zealand10.1038/s41598-021-96574-32045-2322https://doaj.org/article/d5d45f768cd64a8b82888db10988864a2021-08-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-96574-3https://doaj.org/toc/2045-2322Abstract This work uses a high-quality 3D seismic volume from offshore Canterbury Basin, New Zealand, to investigate how submarine canyon systems can focus sub-surface fluid. The seismic volume was structurally conditioned to improve the contrast in seismic reflections, preserving their lateral continuity. It reveals multiple pockmarks, eroded gullies and intra-slope lobe complexes occurring in association with the Waitaki Submarine Canyon. Pockmarks are densely clustered on the northern bank of the canyon and occur at a water depth of 500–900 m. In parallel, near-seafloor strata contain channel-fill deposits, channel lobes, meandering channel belts and overbank sediments deposited downslope of the submarine canyon. We propose that subsurface fluid migrates from relatively deep Cretaceous strata through shallow channel-fill deposits and lobes to latter seep out through the canyon and associated gullies. The new, reprocessed Fluid Cube meta-attribute confirms that fluids have seeped out through the eroded walls of the Waitaki Canyon, with such a seepage generating seafloor depressions in its northern bank. Our findings stress the importance of shallow reservoirs (channel-fill deposits and lobes) as potential repositories for fluid, hydrocarbons, or geothermal energy on continental margins across the world.Priyadarshi Chinmoy KumarTiago M. AlvesKalachand SainNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-16 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Priyadarshi Chinmoy Kumar Tiago M. Alves Kalachand Sain Submarine canyon systems focusing sub-surface fluid in the Canterbury Basin, South Island, New Zealand
description	Abstract This work uses a high-quality 3D seismic volume from offshore Canterbury Basin, New Zealand, to investigate how submarine canyon systems can focus sub-surface fluid. The seismic volume was structurally conditioned to improve the contrast in seismic reflections, preserving their lateral continuity. It reveals multiple pockmarks, eroded gullies and intra-slope lobe complexes occurring in association with the Waitaki Submarine Canyon. Pockmarks are densely clustered on the northern bank of the canyon and occur at a water depth of 500–900 m. In parallel, near-seafloor strata contain channel-fill deposits, channel lobes, meandering channel belts and overbank sediments deposited downslope of the submarine canyon. We propose that subsurface fluid migrates from relatively deep Cretaceous strata through shallow channel-fill deposits and lobes to latter seep out through the canyon and associated gullies. The new, reprocessed Fluid Cube meta-attribute confirms that fluids have seeped out through the eroded walls of the Waitaki Canyon, with such a seepage generating seafloor depressions in its northern bank. Our findings stress the importance of shallow reservoirs (channel-fill deposits and lobes) as potential repositories for fluid, hydrocarbons, or geothermal energy on continental margins across the world.
format	article
author	Priyadarshi Chinmoy Kumar Tiago M. Alves Kalachand Sain
author_facet	Priyadarshi Chinmoy Kumar Tiago M. Alves Kalachand Sain
author_sort	Priyadarshi Chinmoy Kumar
title	Submarine canyon systems focusing sub-surface fluid in the Canterbury Basin, South Island, New Zealand
title_short	Submarine canyon systems focusing sub-surface fluid in the Canterbury Basin, South Island, New Zealand
title_full	Submarine canyon systems focusing sub-surface fluid in the Canterbury Basin, South Island, New Zealand
title_fullStr	Submarine canyon systems focusing sub-surface fluid in the Canterbury Basin, South Island, New Zealand
title_full_unstemmed	Submarine canyon systems focusing sub-surface fluid in the Canterbury Basin, South Island, New Zealand
title_sort	submarine canyon systems focusing sub-surface fluid in the canterbury basin, south island, new zealand
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/d5d45f768cd64a8b82888db10988864a
work_keys_str_mv	AT priyadarshichinmoykumar submarinecanyonsystemsfocusingsubsurfacefluidinthecanterburybasinsouthislandnewzealand AT tiagomalves submarinecanyonsystemsfocusingsubsurfacefluidinthecanterburybasinsouthislandnewzealand AT kalachandsain submarinecanyonsystemsfocusingsubsurfacefluidinthecanterburybasinsouthislandnewzealand
_version_	1718377415251591168

Submarine canyon systems focusing sub-surface fluid in the Canterbury Basin, South Island, New Zealand

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