Results 31 to 40 of about 446 (170)

Geomorphology of the Clarion Clipperton Zone, tropical North Pacific Ocean

Journal of Maps, 2021
The Clarion Clipperton Zone (CCZ) hosts a valuable deposit of polymetallic nodules. Understanding the geology of this deposit is key to its effective exploration and future mining.
John Parianos, Pedro Madureira
doaj   +1 more source

Cobalt and Manganese Extraction from Ocean Nodules by Co-Processing with Steel Metallurgical Slag

Metals, 2023
Polymetallic nodules, also called manganese nodules (due to their high content of this element), contain various valuable metals such as Cu, Ni and Co. These seabed minerals are a good alternative source of Co and Mn due to the decrease in the grade of ...
Kevin Pérez, Norman Toro, Pedro Robles, Sandra Gallegos, Edelmira Gálvez, Francisco Javier González, Egidio Marino, Pía C. Hernández   +7 more
doaj   +1 more source

Slurry electrolysis of ocean polymetallic nodule

Transactions of Nonferrous Metals Society of China, 2010
Abstract The ocean poly-metallic nodule was leached by using slurry electrolysis process in HCl-NaCl medium. The leaching rates of Mn, Co, Cu and Ni in the ocean poly-metallic nodule are all above 97%. Meanwhile, the high purity of electrolytic MnO 2 is also obtained as an anode product.
Cheng-yan WANG, Ding-fan QIU, Fei YIN, Han-yuan WANG, Yong-qiang CHEN   +4 more
openaire   +1 more source

Anomalous oxygen concentration increases in benthic experiments from the Clarion Clipperton Zone are not related to polymetallic nodules [version 1; peer review: 2 approved, 1 not approved]

F1000Research
* Background Polymetallic nodules in the deep sea of the Clarion Clipperton zone (CCZ) have been implicated in the abiotic production of oxygen during benthic chamber respirometer experiments.
Alexander P. Webber, Patrick Downes, Joaquim Bento, Leigh Marsh, Felipe S. Freitas, Michael Clarke   +5 more
doaj   +1 more source

Impact of small-scale disturbances on geochemical conditions, biogeochemical processes and element fluxes in surface sediments of the eastern Clarion–Clipperton Zone, Pacific Ocean [PDF]

Biogeosciences, 2020
The thriving interest in harvesting deep-sea mineral resources, such as polymetallic nodules, calls for environmental impact studies and, ultimately, for regulations for environmental protection.
J. B. Volz, L. Haffert, M. Haeckel, A. Koschinsky, S. Kasten, S. Kasten   +5 more
doaj   +1 more source

Key Seabed Collection Technologies for Commercial Exploitation of Deep-Sea Polymetallic Nodules: Advances and Prospects [PDF]

中国工程科学
Driven by the carbon peaking and carbon neutrality goals as well as the accelerated development of new quality productive forces, the supply-demand tension of critical metals has become increasingly pronounced. As a strategic successor resource, deep-sea
Lubao Luan, Xixi Liu, Xiaodong Niu, Yipeng Xie, Xuelin Liu, Xuguang Chen, Huajun Li   +6 more
doaj   +1 more source

Air-Lift Pumping System for Hybrid Mining of Rare-Earth Elements-Rich Mud and Polymetallic Nodules around Minamitorishima Island

Journal of Marine Science and Engineering
REE-rich mud under the seabed at a 5500–5700 m water depth around Minamitorishima island and polymetallic nodules buried in the deep seabed are very promising and attractive to explore and develop.
Yoshiyuki Shimizu, Masatoshi Sugihara, Koichiro Fujinaga, Kentaro Nakamura, Yasuhiro Kato   +4 more
doaj   +1 more source

Cautionary Tales for Science‐Based Policy in Deep‐Sea Mining Governance

Global Policy, EarlyView.
ABSTRACT This article examines how low‐certainty scientific claims permeate high‐stakes policy debates before rigorous validation. Using deep‐sea mining governance as a focal domain, the study traces high‐visibility narratives, including the “dark oxygen” hypothesis, radioactive risks of polymetallic nodules, projected impacts of sediment plume ...
Lucía Villar‐Muñoz
wiley   +1 more source

Hybrid Mining of Rare-Earth Elements-Rich Mud and Polymetallic Nodules by Air-Lift Pump in Deep Sea around Minamitorishima Island

Journal of MMIJ
REE-rich mud and polymetallic nodules located under the seabed at water depth of 5500–5700 m around Minamitorishima island are highly attractive for exploration and development, given the recent paradigm shift towards renewable energies based on green ...
Yoshiyuki SHIMIZU, Masatoshi SUGIHARA, Yutaro TAKAYA, Koichiro FUJINAGA, Kentaro NAKAMURA, Yasuhiro KATO   +5 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