Results 61 to 70 of about 102,399 (167)
, 2023 Ferromanganese nodules were retrieved at different levels inside a core taken in the vicinity of the Hawaiian Islands. Total iron contents were determined by the bichromate method with reduction by a bismuth reducing agent.
Fomina, Lidiya S +3 more
core +1 more source
European Journal of Inorganic Chemistry, Volume 28, Issue 30, October 22, 2025.As the reduction of transition metal oxides by coal poses a significant climate risk, the use of alternative reducing agents such as hydrogen is becoming increasingly important. This review summarizes the current knowledge of the reduction pathways of transition metal oxides from groups 6 to 8.
Michael Häger +2 more
wiley +1 more source
, 1965 Chemical composition of manganese nodules and a ferromanganese crust using X-ray fluorescence ...
Kennecott Corporation (6968903) +1 more
core +1 more source
Московский журнал международного права, 2009 The article addresses one of the key documents regarding the activity of the states on prospecting, exploration and exploitation of the mineral resources of the International seabed area – the Regulations on prospecting, exploration and exploitation of ...
A. N. Nosikov
doaj +1 more source
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 +4 more
wiley +1 more source
The hydrothermal component in ferromanganese nodules from the southeast Pacific Ocean [PDF]
, 1989 Statistical analyses of geochemical data from ferromanganese nodule samples representing a broad area of the southeast Pacific Ocean indicate nodule compositions are controlled by four factors: (1) suboxic diagenesis; (2) oxic diagenesis; (3) hydrogenous
Chen, Joy C. +3 more
core +1 more source
The Depositional Record, Volume 11, Issue 4, Page 1166-1195, September 2025.Five large Alpine cave systems on the Dachstein (Austria) were investigated and 35 sediment profiles or outcrops between 860 m a.s.l. and 1945 m a.s.l. were analysed. An altitude‐dependent overall stratigraphy is established and depositional conditions and palaeo‐environments are reconstructed.
Franziska Holzer +2 more
wiley +1 more source
Composition and sorption capacity of oceanic and marine ferromanganese nodules
, 1997 Experimental data obtained show that oceanic and marine ferromanganese nodules and crusts are natural ion-exchangers. Exchange capacity of oceanic ferromanganese aggregates is much higher than that of shallow-water marine ones, whereas reactivities of ...
Gleb N Baturin (6959618) +3 more
core +1 more source
, 1982 Ferromanganese deposits, mostly manganese crusts, are common in elevations along the northeastern Brazilian continental margin. Association of the deposits with more or less altered basaltic rock can be observed. On the Pernambuco Plateau and Ceara Guyot,
Xavier, A, A Xavier (6972662)
core +1 more source
Size, surface texture, chemical composition and mineralogy interrelations in ferromanganese nodules of central Indian Ocean [PDF]
, 1989 201-203Fiftyseven ferromanganese nodules, classified into 3 size class ( 4 cm diam.) class. These observations suggest that the smaller nodules appear to have been influenced more by diagenetic processes that the larger ...
Pattan, J N, Jauhari, P, Banakar, V K
core