Proceedings of the Ocean Drilling Program, 144 Scientific Results 1995
DOI: 10.2973/odp.proc.sr.144.057.1995
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Composition of Ferromanganese Crusts and Nodules at Northwestern Pacific Guyots and Geologic and Paleoceanographic Considerations

Abstract: The chemical and mineralogical compositions of ferromanganese crusts collected from surfaces of northwestern Pacific guyots during Ocean Drilling Program (ODP) Leg 144 show that they are mainly hydrogenous deposits; that is, they have been formed by the slow accumulation of trace metal enriched oxides directly from the seawater column. The formation of crusts occurred over a period of 30 (and possibly even 60-90) m.y., when guyots were carried "piggy-back" by the oceanic plates across the equatorial zone of th… Show more

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Cited by 14 publications
(41 citation statements)
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“…The crusts can only form in oxidizing environment. A previous research [19] proved that mineral constituents and structures of crusts located at different latitudes varied, and this fact is regarded by the authors as just the witness of the variations of oxidation degree in different crust-forming environment. The investigation also proved that the oxidation degree of the environment from which the ferromanganese nodules formed was slightly lower than that for crusts, as influence of diagenesis existed in the oceanic bottom and there were abundant todorokites (about 40%-50%) in nodules.…”
mentioning
confidence: 96%
“…The crusts can only form in oxidizing environment. A previous research [19] proved that mineral constituents and structures of crusts located at different latitudes varied, and this fact is regarded by the authors as just the witness of the variations of oxidation degree in different crust-forming environment. The investigation also proved that the oxidation degree of the environment from which the ferromanganese nodules formed was slightly lower than that for crusts, as influence of diagenesis existed in the oceanic bottom and there were abundant todorokites (about 40%-50%) in nodules.…”
mentioning
confidence: 96%
“…• N) seamounts in the Marshall Islands have thick pelagic caps, ranging in thickness from 50 to 150 m (Bogdanov et al, 1995). In the southern study area, the range of thickness of the pelagic caps is similar to that in the Marshall Islands-45-150 m. Drill cores from DSDP site 200 show that the Miocene and Pliocene were the peri- Fig.…”
Section: Seismic Stratigraphy Of the Summitmentioning
confidence: 71%
“…The depth, age, type of host sediment, and size of fossil manganese nodules and crusts are summarized in Table 2 board Scientific Party, 1990aParty, , 1992Party, , 1993aParty, -f, 1996aParty, , b, 1998aParty, -e, 1999bParty, , e, 2000aParty, , 2001aParty, , b, 2002aBogdanov et al, 1995;Murdmaa et al, 1995;Skornyakova and Uspenskaya, 1995;Watkins et al, 1995). The mode of occurrence of fossil manganese nodules and crusts are described for each site in Appendix A1.…”
Section: Fossil Manganese Nodules and Crustsmentioning
confidence: 99%