Results 31 to 40 of about 235 (134)

Hydrothermal Manganese‐Oxide Mineralization of a Carbonate Ooze, Samoan Hotspot Region, South Pacific Ocean

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 8, August 2026.
Abstract Low‐temperature hydrothermal manganese oxides occur throughout the global oceans. However, the hydrothermal replacement of a carbonate ooze by manganese oxides is described here for the first time. The 24 samples dredged from three locations around the Territory of American Samoa in the South Pacific Ocean include six samples with remnant ...
James R. Hein, Amy Gartman, Kira Mizell, Mark Baskaran, Anthony Koppers, Hubert Staudigel   +5 more
wiley   +1 more source

The influence of habitat heterogeneity and disturbance on benthic community structure in deep-sea polymetallic nodule environments and management implications for seabed mining

Frontiers in Marine Science
Habitat heterogeneity is known to influence faunal community structure, but its influence on deep-sea benthic communities remains understudied, particularly for polymetallic nodule environments in abyssal waters.
Ailish Ullmann, Ailish Ullmann, Ashley A. Rowden, Ashley A. Rowden, Daniel Leduc, Daniela Zeppilli   +5 more
doaj   +1 more source

Size reduction of CCZ polymetallic nodules under repeated impact fragmentation

Results in Engineering, 2020
Polymetallic nodules provide an alternative source of valuable metals. Nodules from the seabed of the Clarion Clipperton Zone (CCZ), a prospective mining area, are typically abundant at depths of around 5 ​km. Mining these nodules comprises excavation or
J.M. van Wijk, E. de Hoog
doaj   +1 more source

Potential Short-Term Effects of Mine Tailings on Phytoplankton Assemblages in the Open Ocean

Journal of Marine Science and Engineering, 2022
The disposal of mine tailings into the marine environment is considered an essential option to secure the economic efficiency of deep-sea mining, but it might adversely affects the ecosystem.
Dong Han Choi, Jangyeon Yoo, Wonseok Yang, Jae Hoon Noh, Yeonjung Lee, Kongtae Ra, Kiseong Hyeong, Chan Min Yoo, Jisoo Park   +8 more
doaj   +1 more source

Along the Benthic to Holoplanktonic Continuum: Seafloor Affinity Increases Distance‐Decay Rates Among Abyssal Communities

Global Ecology and Biogeography, Volume 35, Issue 8, August 2026.
ABSTRACT Aim Marine species ranges are often large, contributing to relatively high community similarity over space, with decreased ranges expected among taxa that have lower dispersal and/or higher substrate requirements. We tested for a weakening of biogeographic structuring among dispersing abyssal taxa along the benthic to holoplanktonic habitat ...
Gabrielle N. Ellis, Oliver Kersten, Eric Vetter, Craig R. Smith, Jeffrey C. Drazen, Erica Goetze   +5 more
wiley   +1 more source

Sediment Erosion Generated by a Coandă-Effect-Based Polymetallic-Nodule Collector

Journal of Marine Science and Engineering, 2023
To date, hydraulic collection is the most widely considered technology in polymetallic-nodule mining, since there is no direct contact between hydraulic collectors and ocean floor.
Said Alhaddad, Rudy Helmons
doaj   +1 more source

Abundant interactions and feedbacks between aquatic deoxygenation and the other planetary boundaries suggest “unsafe” levels of oxygen loss with far‐reaching impacts

Limnology and Oceanography, Volume 71, Issue 7, July 2026.
Abstract Oxygen is critical for nearly all life on Earth, including aquatic species that breathe dissolved oxygen in both freshwater and marine systems. The rapid, global, and anthropogenic loss of dissolved oxygen known as “aquatic deoxygenation” threatens life in these environments, the human communities that depend on them, and Earth system ...
Erica M. Ferrer, Yassir A. Eddebbar, Shailja Gangrade, Lillian R. McCormick, Ariel K. Pezner, De'Marcus Robinson, Véronique Garçon, Kevin C. Rose, Lisa A. Levin   +8 more
wiley   +1 more source

Assessing benthic community structure and diversity in the Western Pacific polymetallic nodule area: insights from multi-primer eDNA metabarcoding

Frontiers in Marine Science
IntroductionDeep-sea polymetallic nodules are considered a critical resource for meeting future global metal demands. However, current knowledge of benthic community composition and biodiversity patterns in these regions remains limited, impeding ...
Ziyu Zhao, Ziyu Zhao, Ziyu Li, Ziyu Li, Xuebao He, Juan Yang, Juan Yang, Jianxin Xia, Jianxin Xia   +8 more
doaj   +1 more source

Different Ferromanganese Concretion Morphologies Host Distinct Microbial Communities and Metal Accumulation Patterns in the Baltic Sea

Environmental Microbiology, Volume 28, Issue 7, July 2026.
We investigated how microbes influence the metal accumulation and release in Fe‐Mn concretions from the Gulf of Finland using microcosm incubation experiments. We studied three main concretion morphotypes: crust, discoidal, and spheroidal. Microbes enhanced metal accumulation in discoidal and spheroidal morphotypes.
Renata Majamäki, Joonas Wasiljeff, Lotta Purkamo, Jenni Hultman, Lukas Kohl, Eero Asmala, Pirjo Yli‐Hemminki, Kirsten S. Jørgensen, Johanna Muurinen, Joonas J. Virtasalo   +9 more
wiley   +1 more source

Research Status of Deep-Sea Polymetallic Nodule Collection Technology

Journal of Marine Science and Engineering
The bottom of the ocean is rich in mineral resources, and deep-sea mining has been a research hotspot in recent years. As a key part of deep-sea mining operation, polymetallic nodule collection technology has been researched in many countries around the ...
Boying Liu, Xiaoxiang Wang, Xiuzhan Zhang, Jiancheng Liu, Liangwan Rong, Yong Ma   +5 more
doaj   +1 more source