Results 71 to 80 of about 1,263 (158)

Pockmark-like structures in Lake Constance

, 2008
The role of lakes in the global methane budget seems to be higher than previously thought. Numerous pockmarks have been described for the marine environment, but at freshwater fluid seeps the geological, chemical and biological processes operating are ...
Wessels, M., Bussmann, Ingeborg, Schlüter, Michael, Spiekenbom, K., Schlömer, S.   +4 more
core   +1 more source

Impacts of Coastal Underground Brine Exploitation on the Depletion of Shallow Brine in Beach and Neritic Zones

Water Resources Research, Volume 62, Issue 3, March 2026.
Abstract Coastal underground brine (CUB) exploitation and groundwater discharge jointly drive the depletion of beach and neritic shallow underground brine (BNSUB). BNSUB is crucial for CUB exploitation, yet its reserve remain unquantified, and the impacts of different mining models on its evolution are poorly understood.
Yufeng Zhang, Tengfei Fu, Xiujun Guo, Tianyuan Zheng, Jian Luo   +4 more
wiley   +1 more source

The Enigmatic Pockmarks of the Sandy Southeastern North Sea

Geochemistry, Geophysics, Geosystems
Natural seafloor depressions, known as pockmarks, are common subaqueous geomorphological features found from the deep ocean trenches to shallow lakes.
Christoph Böttner, Jasper J. L. Hoffmann, Daniel Unverricht, Mark Schmidt, Timo Spiegel, Jacob Geersen, Thomas Harald Müller, Jens Karstens, Katrine Juul Andresen, Lasse Sander, Jens Schneider von Deimling, Christopher Schmidt   +11 more
doaj   +1 more source

Pockmarks, Mud Volcanoes and Hydrocarbon Seeps in the Northern Gulf of Mexico: Trends and Controls on Widespread Fluid and Gas Venting

Basin Research, Volume 38, Issue 2, March–April 2026.
Basin‐scale dataset reveals widespread hydrocarbon venting at the seafloor in the northern Gulf of Mexico. Hydrocarbon release at the seafloor is related to the occurrence of the underlying Louann salt and the gas hydrate stability zone. ABSTRACT The release of hydrocarbons, pore water and fluidized sediments impacts seafloor morphology, marine ...
Muhedeen A. Lawal, Ann E. Cook, Alexey Portnov, Aditya Kumar   +3 more
wiley   +1 more source

Fluid flow regimes and growth of a giant pockmark

, 2014
Pockmarks are seafloor depressions commonly associated with fluid escape from the seabed and are believed to contribute noticeably to the transfer of methane into the ocean and ultimately into the atmosphere.
Bohrmann, Gerhard, Marcon, Yann, Olu, Karine, Ondreas, Helene, Sahling, Heiko   +4 more
core   +1 more source

Gas Hydrate Occurrence Inferred from Dissolved Cl− Concentrations and δ18O Values of Pore Water and Dissolved Sulfate in the Shallow Sediments of the Pockmark Field in Southwestern Xisha Uplift, Northern South China Sea

Energies, 2014
Deep-water pockmarks are frequently accompanied by the occurrence of massive gas hydrates in shallow sediments. A decline in pore-water Cl− concentration and rise in δ18O value provide compelling evidence for the gas hydrate dissociation.
Min Luo, Linying Chen, Hongpeng Tong, Wen Yan, Duofu Chen   +4 more
doaj   +1 more source

Numerical modelling of erosional landforms driven by offshore groundwater flow on siliciclastic continental margins: a conceptual approach

Frontiers in Earth Science
Offshore freshened groundwater (OFG) has long been hypothesised to be a key factor shaping continental margins worldwide. Field observations from siliciclastic margins suggest strong causal links between sub-seafloor OFG flow and seafloor depressions ...
Shubhangi Gupta, Shubhangi Gupta, Aaron Micallef   +2 more
doaj   +1 more source

Methane-related community of a carbonate-enriched pockmark, Brazilian Southeastern continental slope

Ocean and Coastal Research, 2022
Pockmarks are geological features that often sustain hydrocarbon-related communities of microorganisms when active, seeping oil or methane. Microbial communities of inactive pockmarks have not been well studied until the present.
Fernanda Mancini Nakamura, Rafael Andre Lourenço, Caio Augusto Magalhães, Amanda Gonçalves Bendia, Ana Carolina de Araújo Butarelli, Julia Gasparini Passos, Luiza Ferreira Soares, Raissa Basti Ramos, Tailisi Hoppe Trevizani, Camila Negrão Signori, Michel Michaelovitch de Mahiques, Paulo Yukio Gomes Sumida, Vivian Helena Pellizari   +12 more
doaj   +2 more sources

Fluid flow at the Loppa High results from the seabed laboratory and test site

Frontiers in Earth Science
The Loppa High is a subsurface structural high located in SW Barents Sea flanked by regional fault complexes where many hydrocarbon discoveries have been made along its peripheries during recent years.
Shyam Chand, Harald Brunstad, Aivo Lepland, Terje Thorsnes, Jon Halvard Pedersen   +4 more
doaj   +1 more source

Archaeal community composition in Holocene methane pockmarks of the Gdańsk Basin (Baltic Sea, Poland): insights from tetraether lipids and 16S rRNA analysis [PDF]

Biogeosciences
Methane pockmarks and shallow gas systems are prominent geomorphological features in the Baltic Sea that act as hotspots of microbial activity. In the Gdańsk Basin, pockmarks vary in gas-seepage intensity and in the extent of freshened porewater ...
I. De Mey-Śnieżyńska, M. Słowakiewicz, F. Peterse, A. Brodecka-Goluch, A. Borkowski, K. Łukawska-Matuszewska   +5 more
doaj   +1 more source