Ferromanganese Crusts in the South Atlantic Ocean: Compositional Evolution and Specific Features of Ore Formation

Дубинин, А. В.; Rimskaya-Korsakova, M. N.; Berezhnaya, E. D.; Uspenskaya, T. Yu.; Dara, O. M.

doi:10.1134/s0016702918110034

Cited by 8 publications

(5 citation statements)

References 27 publications

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“…It should be noted that the number of studied samples from the Atlantic Ocean is not sufficient to make conclusions on the contents of platinum elements in ferromanganese ores of the Atlantic. Nevertheless, the observed PGE concentrations are consistent with the general trend of the lower redox-sensitive element concentration in Fe-Mn oxyhydroxides of the Atlantic compared to the Pacific Ocean [52]. In general, PGE contents in crusts are higher than in nodules.…”

Section: Variations Of Pge Contents In Nodules and Crustssupporting

confidence: 83%

“…Ferromanganese nodules of the Brazil and Cape Basins are located in the same field on the diagram, which we have determined as the nodule area of the Atlantic Ocean. The diagram shows the hydrogenous nodules of the Atlantic and Pacific Oceans in the different areas, since ferromanganese deposits of the Pacific Ocean contain more cobalt [52]. sorbs more effectively on a mixture of ferromanganese oxyhydroxides than on iron oxyhydroxides and manganese oxides separately.…”

Section: Variations Of Pge Contents In Nodules and Crustsmentioning

confidence: 99%

“…Ferromanganese nodules of the Brazil and Cape Basins are located in the same field on the diagram, which we have determined as the nodule area of the Atlantic Ocean. The diagram shows the hydrogenous nodules of the Atlantic and Pacific Oceans in the different areas, since ferromanganese deposits of the Pacific Ocean contain more cobalt [52]. 3-hydrogenous nodules from the Pacific Ocean [14,15], reference samples GSPN-2, OOPE-601, OOPE-603; 4-diagenetic nodules [14,15], reference samples JMn-1, NOD-P-1, GSPN-3, OOPE-602; 5-marginal sea nodules [15,17].…”

Section: Variations Of Pge Contents In Nodules and Crustsmentioning

confidence: 99%

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Accumulation of Platinum Group Elements in Hydrogenous Fe–Mn Crust and Nodules from the Southern Atlantic Ocean

et al. 2018

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Distribution of platinum group elements (Ru, Pd, Pt, and Ir) and gold in hydrogenous ferromanganese deposits from the southern part of the Atlantic Ocean has been studied. The presented samples were the surface and buried Fe-Mn hydrogenous nodules, biomorphous nodules containing predatory fish teeth in their nuclei, and crusts. Platinum content varied from 47 to 247 ng/g, Ru from 5 to 26 ng/g, Pd from 1.1 to 2.8 ng/g, Ir from 1.2 to 4.6 ng/g, and Au from less than 0.2 to 1.2 ng/g. In the studied Fe-Mn crusts and nodules, Pt, Ir, and Ru are significantly correlated with some redox-sensitive trace metals (Co, Ce, and Tl). Similar to cobalt and cerium behaviour, ruthenium, platinum, and iridium are scavenged from seawater by suspended ferromanganese oxyhydroxides. The most likely mechanism of Platinum Group Elements (PGE) accumulation can be sorption and oxidation on δ-MnO 2 surfaces. The obtained platinum fluxes to ferromanganese crusts and to nodules are close and vary from 35 to 65 ng•cm −2 •Ma −1. Palladium and gold do not accumulate in hydrogenous ferromanganese deposits relative to the Earth's crust. No correlation of Pd and Au content with major and trace elements in nodules and crusts have been identified.

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Section: Variations Of Pge Contents In Nodules and Crustssupporting

confidence: 83%

Section: Variations Of Pge Contents In Nodules and Crustsmentioning

confidence: 99%

“…Ferromanganese nodules of the Brazil and Cape Basins are located in the same field on the diagram, which we have determined as the nodule area of the Atlantic Ocean. The diagram shows the hydrogenous nodules of the Atlantic and Pacific Oceans in the different areas, since ferromanganese deposits of the Pacific Ocean contain more cobalt [52]. 3-hydrogenous nodules from the Pacific Ocean [14,15], reference samples GSPN-2, OOPE-601, OOPE-603; 4-diagenetic nodules [14,15], reference samples JMn-1, NOD-P-1, GSPN-3, OOPE-602; 5-marginal sea nodules [15,17].…”

Section: Variations Of Pge Contents In Nodules and Crustsmentioning

confidence: 99%

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Accumulation of Platinum Group Elements in Hydrogenous Fe–Mn Crust and Nodules from the Southern Atlantic Ocean

et al. 2018

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“…The contents of the TEs ( 23 Na, 25 Mg, 27 Al, 29 Si, 31 P, 39 K, 43 Ca, 49 Ti, 51 V, 52 Cr, 55 Mn, 59 Co, 60 Ni, 65 Cu, 66 Zn, 75 As, 77 Se, 95 Mo, 107 Ag, 111 Cd, 118 Sn, 121 Sb, 125 Te, 182 W, 197 Au, 205 Tl, 208 Pb, 209 Bi, 232 Th, 238 U, 139 La, 140 Ce, 141 Pr, 146 Nd, 147 Sm, 153 Eu, 157 Cd, 159 Tb, 163 Dy, 165 Ho, 166 Er, 169 Tm, 172 Yb, 175 Lu) of sulfides and IOHs were analyzed on a New Wave 213-nm solid-state laser microprobe coupled to an Agilent 7700× quadrupole ICP-MS housed at the IMin SU FRC MG UB RAS. The analyses were performed by ablating spots ranging in size from 40 to 80 µm.…”

Section: Methodsmentioning

confidence: 99%

“…The composition of the IOHs in the Ca-P plot is broadly dispersed, and is restricted by the composition of natural Ca-Fe hydroxyphosphates, which are widespread in the IOHs of metalliferous sediments [38,95]. The Ca-Fe hydroxyphosphates have elevated Sr contents (up to 1.08 wt%), while chemogenic apatite has a low Sr content (<0.1 wt%) [38].…”

Section: Tea-iimentioning

confidence: 99%

Trace Element Assemblages of Pseudomorphic Iron Oxyhydroxides of the Pobeda-1 Hydrothermal Field, 17°08.7′ N, Mid-Atlantic Ridge: The Development of a Halmyrolysis Model from LA-ICP-MS Data

et al. 2022

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Halmyrolysis, as one of the global processes of alteration of seafloor hydrothermal sediments, needs to be recognized in terms of mineral and trace element evolution to elaborate new criteria for metallogenic and geoecological forecasts with respect to ocean exploration. The purpose of this paper is to explain trace elements’ behavior during the halmyrolysis of sulfide deposits. This task is resolved using an LA-ICP-MS analysis of iron oxyhydroxides (IOHs) on examples of oxidized pyrrhotite-rich diffusers of the ultramafic-hosted Pobeda-1 hydrothermal field (Mid-Atlantic Ridge). The IOHs formed after the sulfides were enriched in seawater-derived trace elements (Na, K, Mg, Ca, Sr, P, U, Mo, V, REE, Cr). Six trace element assemblages (TEAs) are statistically recognized for the IOHs. TEA-I (Cu, In, Sn, Bi, Se, Te) is inherited from chalcopyrite, isocubanine and bornite microinclusions. TEA-II is typical of Zn sulfides (Zn, Cd, Sb, Tl, Ag) interacted with seawater (Mg, U, Mo, Ni, Na, K) and hydrothermal fluid (Eu). TEA-III (Ca, Sr, Cu, Si, Se, P, As) reflects the inclusions of aragonite, opal, atacamite and possibly native selenium, while P and As occur as absorbed oxyanion groups on IOHs or Ca–Fe hydroxyphosphates. TEA-IV (Al, Ga, Ge, Tl, W, Ti ± Mn, Co, Ba) indicates the presence of minor clays, Co-rich Mn oxyhydroxides and barite. TEA-V with Pb and V is closely related to TEA-VI with REEs except for Eu. The halmyrolysis of sulfides includes two stages: (i) oxidation of S(II) of primary sulfides and the formation of supergene sulfides, which scavenge the redox-sensitive elements (e.g., U, Mo, Ni, Eu), and (ii) oxidation of Fe (II) to Fe (III) and absorption of most elements of TEAs III, IV, V and VI by IOHs.

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Estimates of Metals Contained in Abyssal Manganese Nodules and Ferromanganese Crusts in the Global Ocean Based on Regional Variations and Genetic Types of Nodules

Mizell

Hein

et al. 2022

Perspectives on Deep-Sea Mining

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Ferromanganese Crusts in the South Atlantic Ocean: Compositional Evolution and Specific Features of Ore Formation

Cited by 8 publications

References 27 publications

Accumulation of Platinum Group Elements in Hydrogenous Fe–Mn Crust and Nodules from the Southern Atlantic Ocean

Accumulation of Platinum Group Elements in Hydrogenous Fe–Mn Crust and Nodules from the Southern Atlantic Ocean

Trace Element Assemblages of Pseudomorphic Iron Oxyhydroxides of the Pobeda-1 Hydrothermal Field, 17°08.7′ N, Mid-Atlantic Ridge: The Development of a Halmyrolysis Model from LA-ICP-MS Data

Estimates of Metals Contained in Abyssal Manganese Nodules and Ferromanganese Crusts in the Global Ocean Based on Regional Variations and Genetic Types of Nodules

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