Replication Data for: 'Sedimentary deformation relating to episodic seepage in the last 1.2 million years: a multi-scale seismic study from the Vestnesa Ridge, eastern Fram Strait'

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Cooke, Frances; Plaza-Faverola, Andreia; Buenz, Stefan; Sultan, Nabil; Ramachandran, Hariharan; Bedle, Heather; Patton, Henry; Singhroha, Sunny; Knies, Jochen, 2023, "Replication Data for: 'Sedimentary deformation relating to episodic seepage in the last 1.2 million years: a multi-scale seismic study from the Vestnesa Ridge, eastern Fram Strait'", https://doi.org/10.18710/NMGLRL, DataverseNO, V1

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Description	The dataset contains high resolution seismic (.segy) acquired using the 3D P-cable system onboard the RV Helmer Hanssen on research cruise CAGE 18-4 (https://doi.org/10.7557/cage.6850), and Chirp (.sgy) data acquired using the Kongsberg SBP300 (MK2) onboard the RV Kronprins Haakon on research cruise CAGE 19-3 (https://doi.org/10.7557/cage.6911). The dataset also contains bottom simulating reflection (BSR) modelling (.txt) files. (2023-03-14) Seafloor hydrocarbon seepage is a natural fluid release process that occurs worldwide on continental shelves, slopes, and in deep oceanic basins. The Vestnesa sedimentary ridge in the eastern Fram Strait hosts a deep-water gas hydrate system that became charged with hydrocarbons ~2.7 Ma and has experienced episodic seepage along the entire ridge until a few thousand years ago, when seepage activity apparently ceased in the west but persisted in the east. Although it has been documented that faults and fractures play a key role in feeding the seeps with thermogenic gases, the mechanisms controlling seepage periodicity remain poorly understood. Here we integrate high-resolution P-cable 3D seismic data and Chirp data to investigate the spatial and temporal evolution of high-resolution fractures and fluid flow features in the west of the Vestnesa Ridge. We characterize sediment deformation using the fracture density seismic attribute workflow revealing two highly deformed stratigraphic intervals and associated small-scale pockmarks (< 20 m diameter). Chronostratigraphic constraints from the region show that two highly deformed intervals are influenced by at least three major climatic events for last 1.2 million years: the Mid-Pleistocene Transition (~1.25 – 0.7 Ma), the penultimate deglaciation (~130 Ka) and the last deglacial warming (~14 – 15 Ka). These periods of deformation appear associated with buried methane-derived authigenic carbonate and are potentially sensitive to shifts in the boundary of the free gas - gas hydrate interface. In addition, our results show that it is likely that several metre shifts in the depth of the base of the gas hydrate stability zone associated with major climatic changes, have enhanced deformation and gas leakage along the ridge. Our results have implications for understanding how changes in eustatic sea level and glacial isostatic loading, through key climatic periods, impacts fracture formation and the control on seepage activity. (2023-03-14)
Subject	Earth and Environmental Sciences
Keyword	High resolution 3D seismic, Chirp, Seismic attributes, P-cable, BSR modelling
Related Publication	Cooke F, Plaza-Faverola A, Bünz S, Sultan N, Ramachandran H, Bedle H, Patton H, Singhroha S and Knies J (2023), Sedimentary deformation relating to episodic seepage in the last 1.2 million years: a multi-scale seismic study from the Vestnesa Ridge, eastern Fram Strait. Front. Earth Sci. 11:1188737. doi: 10.3389/feart.2023.1188737
License/Data Use Agreement	CC0 1.0

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Citation Metadata

Persistent Identifier	doi:10.18710/NMGLRL
Publication Date	2023-05-19
Title	Replication Data for: 'Sedimentary deformation relating to episodic seepage in the last 1.2 million years: a multi-scale seismic study from the Vestnesa Ridge, eastern Fram Strait'
Author	Cooke, Frances (UiT The Arctic University of Norway) - ORCID: 0000-0003-2244-3673 Plaza-Faverola, Andreia (UiT The Arctic University of Norway) - ORCID: 0000-0001-7282-4277 Buenz, Stefan (UiT The Arctic University of Norway) - ORCID: 0000-0002-9215-7325 Sultan, Nabil (IFREMER, Brest, France) - ORCID: 0000-0003-0927-4908 Ramachandran, Hariharan (Heriot-Watt University, Edinburgh) - ORCID: 0000-0001-5979-0930 Bedle, Heather (The Univeristy of Oklahoma) - ORCID: 0000-0003-3010-0195 Patton, Henry (UiT The Arctic University of Norway) - ORCID: 0000-0001-9670-611X Singhroha, Sunny (UiT The Arctic University of Norway) - ORCID: 0000-0003-4040-1821 Knies, Jochen (NGU - Geological Survey of Norway) - ScopusID: 15025016200
Point of Contact	Use email button above to contact. Cooke, Frances (UiT The Arctic University of Norway) Plaza Faverola, Andreia (UiT The Arctic University of Norway) Buenz, Stefan (UiT The Arctic University of Norway)
Description	The dataset contains high resolution seismic (.segy) acquired using the 3D P-cable system onboard the RV Helmer Hanssen on research cruise CAGE 18-4 (https://doi.org/10.7557/cage.6850), and Chirp (.sgy) data acquired using the Kongsberg SBP300 (MK2) onboard the RV Kronprins Haakon on research cruise CAGE 19-3 (https://doi.org/10.7557/cage.6911). The dataset also contains bottom simulating reflection (BSR) modelling (.txt) files. (2023-03-14) Seafloor hydrocarbon seepage is a natural fluid release process that occurs worldwide on continental shelves, slopes, and in deep oceanic basins. The Vestnesa sedimentary ridge in the eastern Fram Strait hosts a deep-water gas hydrate system that became charged with hydrocarbons ~2.7 Ma and has experienced episodic seepage along the entire ridge until a few thousand years ago, when seepage activity apparently ceased in the west but persisted in the east. Although it has been documented that faults and fractures play a key role in feeding the seeps with thermogenic gases, the mechanisms controlling seepage periodicity remain poorly understood. Here we integrate high-resolution P-cable 3D seismic data and Chirp data to investigate the spatial and temporal evolution of high-resolution fractures and fluid flow features in the west of the Vestnesa Ridge. We characterize sediment deformation using the fracture density seismic attribute workflow revealing two highly deformed stratigraphic intervals and associated small-scale pockmarks (< 20 m diameter). Chronostratigraphic constraints from the region show that two highly deformed intervals are influenced by at least three major climatic events for last 1.2 million years: the Mid-Pleistocene Transition (~1.25 – 0.7 Ma), the penultimate deglaciation (~130 Ka) and the last deglacial warming (~14 – 15 Ka). These periods of deformation appear associated with buried methane-derived authigenic carbonate and are potentially sensitive to shifts in the boundary of the free gas - gas hydrate interface. In addition, our results show that it is likely that several metre shifts in the depth of the base of the gas hydrate stability zone associated with major climatic changes, have enhanced deformation and gas leakage along the ridge. Our results have implications for understanding how changes in eustatic sea level and glacial isostatic loading, through key climatic periods, impacts fracture formation and the control on seepage activity. (2023-03-14)
Subject	Earth and Environmental Sciences
Keyword	High resolution 3D seismic Chirp Seismic attributes P-cable BSR modelling
Related Publication	Cooke F, Plaza-Faverola A, Bünz S, Sultan N, Ramachandran H, Bedle H, Patton H, Singhroha S and Knies J (2023), Sedimentary deformation relating to episodic seepage in the last 1.2 million years: a multi-scale seismic study from the Vestnesa Ridge, eastern Fram Strait. Front. Earth Sci. 11:1188737. doi: 10.3389/feart.2023.1188737 https://doi.org/10.3389/feart.2023.1188737
Language	English
Producer	UiT The Arctic University of Norway (UiT) https://en.uit.no/
Contributor	Research Group : Centre for Arctic Gas Hydrate, Environment and Climate (CAGE)
Funding Information	Tromsø Research Foundation: A31680 The Research Council of Norway: 287865 The Research Council of Norway: 223259
Distributor	UiT The Arctic University of Norway (UiT The Arctic University of Norway) https://dataverse.no/dataverse/uit
Depositor	Cooke, Frances Ann
Deposit Date	2023-03-08
Date of Collection	Start Date: 2018-07-22 ; End Date: 2018-07-24 Start Date: 2019-03 ; End Date: 2019-03
Data Type	Survey data; 3D seismic; chirp; sub-bottom profiler; P-cable
Software	OpendTect, Version: 6.6 Petrel, Version: 2020
Other Reference	Cruise report: Bünz, S. (2022). Cruise CAGE-18-4. CAGE – Centre for Arctic Gas Hydrate, Environment and Climate Report Series, 6. https://doi.org/10.7557/cage.6850; Cruise report: Knies, J., & Vadakkepuliyambatta, S. (2023). CAGE19-3 Cruise Report: Calypso giant piston coring in the Atlantic-Arctic gateway – Investigation of continental margin development and effect of tectonic stress on methane release. CAGE – Centre for Arctic Gas Hydrate, Environment and Climate Report Series, 7. https://doi.org/10.7557/cage.6911

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Geographic Coverage	Svalbard and Jan Mayen
Geographic Bounding Box	6.00896 6.33314 79.13797 79.09021

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