Results 101 to 110 of about 2,801 (218)

Beyond the plains: deep-sea mining of polymetallic nodules on and around seamounts

Frontiers in Marine Science
Deep-sea mining management, scientific research, and public discourse have largely focused on polymetallic nodule extraction from abyssal plains. However, there is growing commercial interest in nodules on and around seamounts, with exploration and ...
Cherisse Du Preez, Cherisse Du Preez, Heidi Gartner, Sheryl Murdock, Verena Tunnicliffe   +4 more
doaj   +1 more source

Peak Last Glacial weathering intensity on the North American continent recorded by the authigenic Hf isotope composition of North Atlantic deep-sea sediments [PDF]

, 2014
We have retrieved radiogenic hafnium (Hf) isotope compositions (ɛHf) from authigenic Fe–Mn oxyhydroxides of deep northwest Atlantic sediments deposited over the past 26 ka to investigate the oceanic evidence of changes in dissolved weathering inputs from
Frank, Martin, Gutjahr, Marcus, Halliday, Alex N., Lippold, Jörg   +3 more
core   +1 more source

Radiogenic isotopes: Tracers of past ocean circulation and erosional input [PDF]

, 2002
The radiogenic isotope composition of dissolved trace metals in the ocean represents a set of relatively new and not yet fully exploited tracers with a large potential for oceanographic and paleoceanographic research on timescales from the present back ...
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core   +1 more source

Petrography and stratigraphic Os isotopic ages of ferromanganese nodules from the Northwest Pacific east of Minamitorishima Island

Journal of Asian Earth Sciences: X
The area offshore of Minamitorishima Island, Northwestern Pacific Ocean, contains large amounts of seafloor mineral resources such as ferromanganese (Fe–Mn) nodules, Fe–Mn crusts, and rare-earth element and yttrium (REY)-rich muds.
Tatsuo Nozaki, Kosuke T. Goto, Yutaro Takaya, Kazuhiko Shimada, Akira Owada, Gen Shimoda, Jun-Ichi Kimura, Qing Chang, Tetsuji Onoue, Shiki Machida, Teruaki Ishii, Kenji Shimizu, Naoto Hirano, Kazuhide Mimura, Moei Yano, Junichiro Ohta, Yasuhiro Kato   +16 more
doaj   +1 more source

In-situ analysis of polymetallic nodules from the clarion-Clipperton zone, Pacific Ocean: implication for controlling on chemical composition variability

Frontiers in Marine Science
Polymetallic ferromanganese nodules (PMNs) in the Clarion-Clipperton Zone (CCZ) exhibit significant spatial variability in chemical composition, which complicates exploration efforts and increases associated costs.
Jie Li, Yinjia Jin, Hao Wang, Kehong Yang, Zhimin Zhu, Xingwei Meng, Xiaohu Li   +6 more
doaj   +1 more source

Discovery of mature thermogenic hydrocarbons in ferromanganese nodules from the Gulf of Cadiz: a new tool for oil and gas exploration [PDF]

, 2010
Ferromanganese nodules were firstly collected during the Tasyo Project cruises from mudcarbonate mounds and mud volcanoes at the Guadalquivir Diapiric Ridge (Central Eastern Atlantic).
González, Francisco Javier, León, Ricardo, Medialdea, Teresa, Ortiz Menéndez, José Eugenio, Somoza, Luis, Torres Pérez-Hidalgo, Trinidad José   +5 more
core  

DIRECT CATALYTIC REDUCTION OF SO2BY SYNTHESIS GASOVER GRANULATED AND MONOLITHIC Fe-Mn CATALYSTS

Вестник Кемеровского государственного университета, 2015
Preparation methods of granulated and monolithic Fe-Mn catalysts on the base of ferromanganese nodules were developed. The textural, structural and strength properties of catalysts were studied.
N. V. Shikina, S. R. Khairulin, S. A. Yashnik, A. A. Gavrilovа, Z. R. Ismagilov   +4 more
doaj  

Séance spécialisée : géodynamique des bassins océaniques et des marges continentales [PDF]

, 1992
Une morphologie de fonds sous-marins bathyaux comportant des indurations liées à des dépôts ferro-manganésifères inclus dans des sédiments hémipélagiques peu ou pas cimentés a été découverte sur une ride volcanique tertiaire au large de la Nouvelle ...
Bouchet, Philippe, Bourseau, Jean-Paul, Gaillard, Christian, Grandperrin, René, Guille, Alain, Guérin, H., Laurin, Bernard, Monniot, Claude, Richer de Forges, Bertrand, Rio, M., Roux, M., Segonzac, Michel, Vacelet, J., Vanney, J.R., Zibrowius, H.   +14 more
core  

The biogeochemistry of metal cycling [PDF]

The results of the Planetary Biology and Microbial Ecology's summer 1987 program are summarized. The purpose of the interdisciplinary PBME program is to integrate, via lectures and laboratory work, the contributions of university and NASA scientists and ...
Dutcher, F. Ronald, Nealson, Kenneth H., Nealson, Molly   +2 more
core   +1 more source

Near-Earth Supernova Explosions: Evidence, Implications, and Opportunities [PDF]

, 2019
There is now solid experimental evidence of at least one supernova explosion within 100 pc of Earth within the last few million years, from measurements of the short-lived isotope ⁶⁰Fe in widespread deep-ocean samples, as well as in the lunar regolith ...
Fields, Brian D., Mewaldt, Richard A.
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