Results 11 to 20 of about 235 (134)

Checklist of ichthyoplankton of NORI-D polymetallic nodule exploration claim (eastern Clarion-Clipperton Zone) during winter 2021 [PDF]

Biodiversity Data Journal
There been increasing interest in polymetallic nodule mining within the Clarion-Clipperton Zone (CCZ). Polymetallic nodule mining within NORI-D will release a sediment plume within the water column and a previous mining collector test within the Nauru ...
Leah Bergman, Javier Montenegro, Charlotte Seid, Tiffany Bachtel, Frazer Mann, Erik Thuesen, Dhugal Lindsay, Jeffrey Drazen   +7 more
doaj   +3 more sources

Comminution of Polymetallic Nodules with a High-Pressure Water Jet

Materials, 2022
This paper presents an original method for the comminution of polymetallic nodules in a hydro-jet mill of our own design, having the water jet pressure in the range of 70–200 MPa. The best comminution results are ensured by equipping the mill with a water jet having a diameter dw = 0.7 mm and a comminution-homogenization tube having a diameter dh = 2.4
Przemysław J. Borkowski, Tomasz Abramowski, Monika Szada-Borzyszkowska, Wiesław Szada-Borzyszkowski   +3 more
openaire   +2 more sources

From the Surface to the Deep-Sea: Bacterial Distributions across Polymetallic Nodule Fields in the Clarion-Clipperton Zone of the Pacific Ocean

Frontiers in Microbiology, 2017
Marine bacteria regulate fluxes of matter and energy essential for pelagic and benthic organisms and may also be involved in the formation and maintenance of commercially valuable abyssal polymetallic nodules.
Markus V. Lindh, Brianne M. Maillot, Christine N. Shulse, Andrew J. Gooday, Diva J. Amon, Craig R. Smith, Matthew J. Church, Matthew J. Church   +7 more
doaj   +1 more source

Polymetallic Nodule Resource Assessment of Seabed Photography Based on Denoising Diffusion Probabilistic Models

Journal of Marine Science and Engineering, 2023
Polymetallic nodules, found abundantly in deep-ocean deposits, possess significant economic value and represent a valuable resource due to their high metal enrichment, crucial for the high-tech industry.
Mingyue Shao, Wei Song, Xiaobing Zhao
doaj   +1 more source

Near-Field Analysis of Turbidity Flows Generated by Polymetallic Nodule Mining Tools

Mining, 2021
The interest in polymetallic nodule mining has considerably increased in the last few decades. This has been largely driven by population growth and the need to move towards a green future, which requires strategic raw materials. Deep-Sea Mining (DSM) is
Mohamed Elerian, Said Alhaddad, Rudy Helmons, Cees van Rhee   +3 more
doaj   +1 more source

Simultaneous Leaching of Seafloor Massive Sulfides and Polymetallic Nodules [PDF]

Minerals, 2019
Simultaneous leaching of seafloor massive sulfides (SMS) from Loki’s Castle on the Arctic Mid-Ocean Ridge (AMOR) and polymetallic nodules (PN) from Clarion Clipperton Zone (CCZ) of the Central Pacific Ocean was studied. Leaching tests were conducted using sulfuric acid and sodium chloride, at a temperature of 80 °C for 48 h under reflux.
Przemyslaw Kowalczuk, Hassan Bouzahzah, Rolf Kleiv, Kurt Aasly   +3 more
openaire   +2 more sources

Alpha radiation from polymetallic nodules and potential health risks from deep-sea mining

Scientific Reports, 2023
In search for critical elements, polymetallic nodules at the deep abyssal seafloor are targeted for mining operations. Nodules efficiently scavenge and retain several naturally occurring uranium-series radioisotopes, which predominantly emit alpha ...
Jessica B. Volz, Walter Geibert, Dennis Köhler, Michiel M. Rutgers van der Loeff, Sabine Kasten   +4 more
doaj   +1 more source

Are seamounts refuge areas for fauna from polymetallic nodule fields? [PDF]

Biogeosciences, 2020
Seamounts are abundant and prominent features on the deep-sea floor and intersperse with the nodule fields of the Clarion-Clipperton Fracture Zone (CCZ).
D. Cuvelier, P. A. Ribeiro, P. A. Ribeiro, S. P. Ramalho, S. P. Ramalho, D. Kersken, D. Kersken, P. Martinez Arbizu, A. Colaço   +8 more
doaj   +1 more source

Copper-binding ligands in deep-sea pore waters of the Pacific Ocean and potential impacts of polymetallic nodule mining on the copper cycle

Scientific Reports, 2021
The release of potentially toxic metals, such as copper (Cu), into the water column is of concern during polymetallic nodule mining. The bioavailability and thus toxicity of Cu is strongly influenced by its speciation which is dominated by organic ligand
Sophie A. L. Paul, Rebecca Zitoun, Ann Noowong, Mythili Manirajah, Andrea Koschinsky   +4 more
doaj   +1 more source

Meiofauna in a Potential Deep-Sea Mining Area—Influence of Temporal and Spatial Variability on Small-Scale Abundance Models

Diversity, 2020
In large areas of the Clarion Clipperton Fracture Zone (northeast Pacific), exploration of deep-sea polymetallic nodules as a potential source of high-technology metals is ongoing. Deep-sea mining may have a severe impact on the benthic communities. Here,
Katja Uhlenkott, Annemiek Vink, Thomas Kuhn, Benjamin Gillard, Pedro Martínez Arbizu   +4 more
doaj   +1 more source