Article
Geosciences, Multidisciplinary
Francesco Turco, Yoann Ladroit, Sally J. Watson, Sarah Seabrook, Cliff S. Law, Gareth J. Crutchley, Joshu Mountjoy, Ingo A. Pecher, Jess I. T. Hillman, Susi Woelz, Andrew R. Gorman
Summary: This study investigates active gas seepage sites along the Hikurangi Margin off the North Island of New Zealand using seismic reflection, multibeam, and split-beam hydroacoustic data. The research reveals significant gas emissions in the region, which may impact seafloor biological communities and ocean biogeochemistry.
FRONTIERS IN EARTH SCIENCE
(2022)
Article
Geosciences, Multidisciplinary
Karsten F. Kroeger, Gareth J. Crutchley, Jess It Hillman, Francesco Turco, Philip M. Barnes
Summary: Gas hydrates are found along convergent margins and their distribution is influenced by factors such as gas sources and permeable faults. 3D modeling shows that the gas is predominantly sourced from microbial generation and migrates through thrust faults and permeable strata to form gas hydrates. Over the past 2 million years, continuous gas migration due to ridge deformation has led to the enrichment of gas hydrates, a process that may be common in many convergent margins.
MARINE AND PETROLEUM GEOLOGY
(2022)
Article
Geosciences, Multidisciplinary
Myriam Kars, Annika Greve, Lilly Zerbst
Summary: Authigenic ferrimagnetic iron sulfides, particularly greigite, are commonly found in gas hydrate-bearing marine sediments of active accretionary prisms. This study at Site U1518 aims to document rock magnetic properties and magnetic mineral composition, revealing high remanent coercivity and single-domain greigite patterns in most samples. The widespread distribution of greigite at this site is associated with methane diffusion and methane hydrate, with enhanced microbial activity likely favoring the formation and preservation of greigite in certain intervals. The close linkage between greigite, methane hydrate, and microbial activity is highlighted at the Hikurangi Margin.
FRONTIERS IN EARTH SCIENCE
(2021)
Article
Geosciences, Multidisciplinary
Michael T. Macnaughtan, Ingo A. Pecher, Lorna J. Strachan
Summary: This study examines the causes of widespread BSR gaps near the hinge area of synclines using seismic stratigraphic and structural interpretation. The researchers suggest a tectono-sedimentary model where sedimentation into accretionary wedge synclines leads to an upward migration of the gas hydrate stability, causing the dissociation of gas hydrates and resulting in BSR gaps.
Article
Geosciences, Multidisciplinary
Uma Shankar, Maheswar Ojha, Ranjana Ghosh
Summary: The Hikurangi margin in New Zealand is a unique location for studying slow slip creep-like deformation, seafloor failure, and the presence of gas hydrates. The International Ocean Discovery Program expedition discovered gas hydrates in the deformed sediments, providing evidence of possible fluid and gas migration pathways. The rock physics modeling and seismic profiles analysis indicated low gas hydrate concentrations in the region and highly deformed sediments due to fluid/gas migration pathways.
MARINE AND PETROLEUM GEOLOGY
(2021)
Article
Engineering, Marine
Maheswar Ojha, Uma Shankar, Ranjana Ghosh
Summary: The Tuaheni Landslide Complex in New Zealand is a valuable location for studying deformation and seabed failure, as well as the presence of gas hydrates and fluid migration. Seismic attributes play a crucial role in identifying these geological features and bed boundaries. This study demonstrates the use of seismic attributes to illustrate fluid migration pathways, sediment slide, debris flow, and gas migration. The role of tectonic activity and gas hydrate dissociation in seafloor sliding and local tectonic activities is also evident.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2023)
Article
Geochemistry & Geophysics
Gareth J. Crutchley, Jess I. T. Hillman, Karsten F. Kroeger, Sally J. Watson, Francesco Turco, Joshu J. Mountjoy, Bryan Davy, Susi Woelz
Summary: Sub-seabed fluid flow, gas hydrate accumulation and seafloor methane seepage are closely connected processes that have significant impacts on marine biodiversity, ocean chemistry, and seafloor stability. The study explores the relationship between shallow structural deformation, focused gas migration, and hydrate accumulation using seismic data in the southern Hikurangi subduction wedge. The results reveal variations in the deformation of ridges and the orientation of gas flow structures, highlighting the importance of understanding shallow stress fields in controlling fluid flow patterns and methane seepage.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2023)
Article
Geochemistry & Geophysics
G. J. Crutchley, J. J. Mountjoy, J. I. T. Hillman, F. Turco, S. Watson, P. B. Flemings, B. Davy, S. Woelz, A. R. Gorman, J. Bialas
Summary: Research has shown that gas migration through vertical conduits within the gas hydrate stability zone is a global phenomenon, impacting seafloor biodiversity and ocean biogeochemistry. Seismic imaging of the gas hydrate system beneath an anticlinal ridge at New Zealand's Hikurangi subduction margin revealed the accumulation of gas beneath the stability zone, leading to the formation of a vertical gas conduit to the seafloor. The presence of highly reflective zones at the bases of gas conduits suggests the importance of intervening sealing units in determining their formation.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2021)
Article
Energy & Fuels
Paul A. Oluwunmi, Matthew T. Reagan, Ingo A. Pecher, Rosalind A. Archer, George J. Moridis, Ashley A. Rowden, David A. Bowden
Summary: Reservoir depressurization is currently the most effective method for extracting gas from natural gas hydrates. This paper models the potential effects of gas hydrate production on fluid flow at the seafloor, specifically for different overburden permeabilities. The models predict a significant influx of water from the ocean when a high-permeability gas hydrate reservoir is overlain by a silt-dominated overburden with moderate permeability, which could have profound implications for production efficiency and seafloor communities.
Article
Geosciences, Multidisciplinary
Stephanie Dupre, Jean-Paul Foucher, Catherine Pierre, Carole Decker, Graham Westbrook, Stephan Ker, Karine Olu, Jean-Pierre Donval, Jean-Luc Charlou, Marie-Madeleine Blanc-Valleron, Herve Nouze
Summary: Fluid seepage within the Nyegga pockmark field off mid-Norway was investigated through ROV dives at the CNE sites. The seafloor morphology corresponds to pockmarks and adjacent ridges, and chimneys underlie these structures. Present-day methane-rich fluid seepage is indicated by chemosynthetic fauna, microbial mats, and bottom-water methane anomalies. The presence of authigenic carbonates and the ages of methane venting periods provide insights into past seepage. The seafloor morphology, seepage patterns, and pore-water chemistry profiles show heterogeneity.
FRONTIERS IN EARTH SCIENCE
(2023)
Article
Energy & Fuels
Xianwei Guo, Kangji Shi, Dawei Guan, Xin Lv, Qingping Li, Hongsheng Dong, Jiafei Zhao, Lei Yang, Zheyuan Liu
Summary: Gas hydrates can occur on the seafloor, coexisting with bubbling gas in cold seeps. The study found that enhanced gas-water contact due to gas flow can lead to universal hydrate nucleation throughout sedimentary matrices. Higher gas flow rates and formation pressures can result in faster hydrate formation, emphasizing the importance of sufficient gas-water contact in the process.
Article
Geosciences, Multidisciplinary
Cornelius O. Schwarze, Jenni L. Hopkins, Sonja Storm, Alan Orpin, Axel K. Schmitt, Nina Kukowski
Summary: This study provides important evidence for the history of activity in the Taupo over bar Volcanic Zone (TVZ) in New Zealand's North Island through the analysis of volcanic ash deposits in MeBo200 sediment cores, including both known and newly discovered tephra layers. This is significant for studying volcanic activity and chronostratigraphic correlation of marine sediment layers.
JOURNAL OF VOLCANOLOGY AND GEOTHERMAL RESEARCH
(2022)
Article
Thermodynamics
Haijun Wang, Peng Wu, Yanghui Li, Weiguo Liu, Xuelian Pan, Qingping Li, Yufa He, Yongchen Song
Summary: This study investigated the influence of hydrate saturation and effective stress on permeability change. It found that hydrate saturation has a dominant effect on permeability dynamic change under low effective stress, while effective stress variation dominates at higher effective stresses. Additionally, compression was found to enhance heat transfer efficiency in high-saturation samples.
Article
Energy & Fuels
Mahboubeh Rahmati-Abkenar, Milad Alizadeh, Marcelo Ketzer
Summary: This study presents a new approach of dynamic transport-reaction model combined with sediment deposition to reproduce the distribution of methane in marine sediments. By predicting methane concentration, the model provides a robust estimation tool for carbon budget in sediments.
Article
Environmental Sciences
Zhiwei Zhu, Yuncheng Cao, Zihan Zheng, Nengyou Wu, Duofu Chen
Summary: This study applied the van der Waals-Platteeuw model to investigate the formation of CH4-H-2 hydrates in marine serpentinization environments, taking into account the effects of salinity. The model accurately predicted the three-phase equilibrium temperature and pressure for CH4-H-2 hydrates in pure water and provided theoretical insights for gas hydrate research in areas with marine serpentinization.
FRONTIERS IN MARINE SCIENCE
(2023)
Editorial Material
Geosciences, Multidisciplinary
Damien Do Couto, Speranta-Maria Popescu, Jean-Pierre Suc, Mihaela Carmen Melinte-Dobrinescu, Nadia Barhoun, Christian Gorini, Laurent Jolivet, Jeffrey Poort, Gwenael Jouannic, Jean-Luc Auxietre
MARINE AND PETROLEUM GEOLOGY
(2015)
Article
Geosciences, Multidisciplinary
Sylvie Leroy, Nadine Ellouz-Zimmermann, Jordane Corbeau, Frederique Rolandone, Bernard Mercier de Lepinay, Bertrand Meyer, Roberte Momplaisir, Jose-Luis Granja Bruna, Anne Battani, Celine Baurion, Evgueni Burov, Valerie Clouard, Remy Deschamps, Christian Gorini, Youri Hamon, Manfred Lafosse, Jottin Leonel, Laetitia Le Pourhiet, Pilar Llanes Estrada, Nicolas Loget, Francis Lucazeau, Daniel Pillot, Jeffrey Poort, Kevin R. Tankoo, Jose-Luis Cuevas, Jose-Fernando Alcaide, Claude Jean Poix, Alfonso Munoz-Martin, Serge Mitton, Yamil Rodriguez, Julien Schmitz, Leonardo Seeber, Andres Carbo-Gorosabel, Santiago Munoz
Review
Geosciences, Multidisciplinary
Estelle Leroux, Marina Rabineau, Daniel Aslanian, Christian Gorini, Stephane Molliex, Francois Bache, Cecile Robin, Laurence Droz, Maryline Moulin, Jeffrey Poort, Jean-Loup Rubino, Jean-Pierre Suc
Article
Geochemistry & Geophysics
V. Le Gal, F. Lucazeau, M. Cannat, J. Poort, C. Monnin, A. Battani, F. Fontaine, B. Goutorbe, F. Rolandone, C. Poitou, M. -M. Blanc-Valleron, A. Piedade, A. Hipolito
EARTH AND PLANETARY SCIENCE LETTERS
(2018)
Article
Geosciences, Multidisciplinary
Alexey A. Krylov, Akihiro Hachikubo, Hirotsugu Minami, Tatyana V. Pogodaeva, Tamara I. Zemskaya, Mariya G. Krzhizhanovskaya, Jeffrey Poort, Oleg M. Khlystov
INTERNATIONAL JOURNAL OF EARTH SCIENCES
(2018)
Article
Geosciences, Multidisciplinary
Nikolay G. Granin, Natalia A. Radziminovich, Marc De Batist, Mikhail M. Makarov, Vladimir V. Chechelnitcky, Vadim V. Blinov, Ilya A. Aslamov, Ruslan Yu Gnatovsky, Jeffry Poort, Sergei G. Psakhie
MARINE AND PETROLEUM GEOLOGY
(2018)
Article
Geosciences, Multidisciplinary
O. M. Khlystov, J. Poort, A. Mazzini, G. G. Akhmanov, H. Minami, A. Hachikubo, A. V. Khabuev, A. V. Kazakov, M. De Batist, L. Naudts, A. G. Chensky, S. S. Vorobeva
MARINE AND PETROLEUM GEOLOGY
(2019)
Article
Geosciences, Multidisciplinary
Giovanni Aloisi, Tatiana V. Pogodaeva, Jeffrey Poort, Andrey V. Khabuev, Andrey V. Kazakov, Grigorii G. Akhmanov, Oleg M. Khlystov
GEO-MARINE LETTERS
(2019)
Article
Environmental Sciences
Tatyana Pogodaeva, Jeffrey Poort, Giovanni Aloisi, Lucas Bataillard, Mikhail M. Makarov, Andrey Khabuev, Andrey Kazakov, Aleksandr G. Chensky, Oleg M. Khlystov
JOURNAL OF GREAT LAKES RESEARCH
(2020)
Article
Geosciences, Multidisciplinary
Jeffrey Poort, Francis Lucazeau, Virginie Le Gal, Michela Dal Cin, Estelle Leroux, Abderrezak Bouzid, Marina Rabineau, Desiree Palomino, Anne Battani, Grigory G. Akhmanov, Giulia Matilde Ferrante, Dina R. Gafurova, Roza Si Bachir, Alexander Koptev, Maxime Tremblin, Massimo Bellucci, Romain Pellen, Angelo Camerlenghi, Sebastien Migeon, Belen Alonso, Gemma Ercilla, Abdel Karim Yelles-Chaouche, Oleg M. Khlystov
Article
Geochemistry & Geophysics
E. d'Acremont, M. Lafosse, A. Rabaute, G. Teurquety, D. Do Couto, G. Ercilla, C. Juan, B. Mercier de Lepinay, S. Lafuerza, J. Galindo-Zaldivar, F. Estrada, J. T. Vazquez, S. Leroy, J. Poort, A. Ammar, C. Gorini
Article
Geosciences, Multidisciplinary
Frederique Rolandone, Francis Lucazeau, Jeffrey Poort, Sylvie Leroy
Article
Geochemistry & Geophysics
V. A. Zhemchugova, N. Evdokimov, J. Poort, G. G. Akhmanov
LITHOLOGY AND MINERAL RESOURCES
(2020)
Article
Multidisciplinary Sciences
Akihiro Hachikubo, Hirotsugu Minami, Satoshi Yamashita, Andrey Khabuev, Alexey Krylov, Gennadiy Kalmychkov, Jeffrey Poort, Marc De Batist, Alexandr Chenskiy, Andrey Manakov, Oleg Khlystov
SCIENTIFIC REPORTS
(2020)
Article
Geosciences, Multidisciplinary
Thomas Mestdagh, Jeffrey Poort, Marc De Batist
EARTH-SCIENCE REVIEWS
(2017)