Results 71 to 80 of about 2,744 (183)

DEEP SEA GEOMET: POLYMETALLIC NODULE GEOCHEMISTRY AND MINERALOGY FOR SUSTAINABLE SEAFLOOR MINING

, 2022
196 pages ; Deep sea mining of polymetallic nodules in the Clarion Clipperton Zone (CCZ) is a method for sourcing critical minerals for renewable energy and battery technologies. In this study, seafloor nodules from the CCZ were analyzed using μ-XRF, p-XRF, X- CT, and whole rock geochemistry.
openaire   +2 more sources

Numerical simulations and large-scale experimental research into air-lifting system for deep-sea mining

International Journal of Naval Architecture and Ocean Engineering
The deep seabed harbors abundant mineral resources. To achieve the economic viability of deep-sea mining, the efficiency of polymetallic nodule lifting is critical.
JianYu Xiao, Zhuang Kang, Jing Leng, Ming Chen, Jun Liu   +4 more
doaj   +1 more source

Effects of experimental in situ seabed disturbance on deep‐sea macrofaunal communities of Chatham Rise, Southwest Pacific

New Zealand Journal of Marine and Freshwater Research, Volume 59, Issue 5, Page 1422-1459, December 2025.
ABSTRACT With the possibility of deep‐sea mining of mineral resources occurring, it is necessary to understand potential impacts on benthic communities. Previous simulated mining experiments revealed direct benthic impacts; however, indirect impacts of sedimentation are not well understood.
Campbell Murray, Ashley A. Rowden, Daniel Leduc, Scott D. Nodder, Rachel Hale, Jane Halliday, Malcolm R. Clark   +6 more
wiley   +1 more source

Almost billfish: convergent longirostry, micro‐dentition, and possible glandular sinuses in a large teleost fish from the Upper Cretaceous of Northern Italy

Journal of Anatomy, Volume 247, Issue 6, Page 1109-1130, December 2025.
A fossil rostrum fragment of a large teleost fish from the Upper Cretaceous of Northern Italy reveals remarkable anatomical convergences with Cenozoic and Recent billfishes (marlins, swordfishes, and akin). The extinct group Plethodidae independently acquired a long snout, micro‐teeth, and oil‐gland sinuses well before the evolution of true billfishes.
Giovanni Serafini, Jürgen Kriwet, Tommaso Toldo, Eliana Fornaciari, Jacopo Amalfitano, Giorgio Carnevale   +5 more
wiley   +1 more source

From Sea Surface to Seafloor: A Benthic Allochthonous eDNA Survey for the Abyssal Ocean

Frontiers in Marine Science, 2020
Environmental DNA (eDNA) metabarcoding could facilitate rapid and comprehensive biotic surveys in the deep ocean, yet many aspects of the sources and distribution of eDNA in the deep sea are still poorly understood.
Olivier Laroche, Olivier Laroche, Oliver Kersten, Craig R. Smith, Erica Goetze   +4 more
doaj   +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

Millennial‐Scale Hydrothermal Variability at the Carlsberg Ridge Driven by Sea‐Level Change and Transient Magmatism

Geochemistry, Geophysics, Geosystems, Volume 26, Issue 11, November 2025.
Abstract Hydrothermal systems at mid‐ocean ridges (MORs) mediate the transfer of heat and geochemical fluxes from the mantle to the hydrosphere, facilitating fluid‐rock interaction and metal cycling. While short‐term hydrothermal dynamics are well studied, the long‐term response of these systems at slow‐spreading ridges to glacial‐interglacial sea ...
Sayantan De, Sunil Kumar Singh, Robin John   +2 more
wiley   +1 more source

The Stability of Manganese Oxides Under Laser Irradiation During Raman Analyses: II. Layer Structures

Journal of Raman Spectroscopy, Volume 56, Issue 10, Page 1072-1088, October 2025.
Manganese oxides are important geomaterials with diverse technological applications. Here, we investigate the behaviour of the most common Mn oxides with layer structures under irradiation by a 532‐nm laser, with intensity ranging from 23 µW/µm2 to 36.8 mW/µm2.
Simone Bernardini, Giancarlo Della Ventura, Luigi Jovane, Armida Sodo, Boriana Mihailova   +4 more
wiley   +1 more source

Advancing Nitrate‐to‐Ammonia Electrocatalysis: Strategies in Catalyst Design, Electrolyte Engineering, and Performance Evaluation

Advanced Science, Volume 12, Issue 34, September 11, 2025.
This review highlights the latest advances in electrocatalytic nitrate reduction to ammonia, with a focus on catalyst design strategies, electrolyte engineering, and performance evaluation. Abstract The electrochemical reduction of nitrate for ammonia production not only offers a promising alternative to the traditional Haber–Bosch process, which ...
Juan Bai, Ziyou Dong, Xudong Jiang, Qianqin Zhou, Jiahao Zhao, Jun Mei, Ziqing Tan, Ting Liao, Ziqi Sun   +8 more
wiley   +1 more source

Experimental investigation of the inhibition of deep-sea mining sediment plumes by polyaluminum chloride

International Journal of Mining Science and Technology
Deep-sea sediment disturbance may occur when collecting polymetallic nodules, resulting in the creation of plumes that could have a negative impact on the ecological environment. This study aims to investigate the potential solution of using polyaluminum
Fengpeng Zhang, Xuguang Chen, Jiakang Wei, Yangyang Zhang, Weikun Xu, Hao Li   +5 more
doaj   +1 more source