Geochemical features of Fe-Mn micronodules in deep-sea sediments of the western North Pacific Ocean: Potential for co-product metal extraction from REY-rich mud

Yasukawa, Kazutaka; Kino, Satoshi; Azami, Keishiro; Tanaka, Erika; Mimura, Kazuhide; Ohta, Junichiro; Fujinaga, Koichiro; Nakamura, Kozo; Kato, Yasuhiro

doi:10.1016/j.oregeorev.2020.103805

Cited by 37 publications

(47 citation statements)

References 75 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Yasukawa et al [37] handpicked Fe-Mn micronodules from 30 horizons of the three cores (11 horizons in PC05, 11 horizons in PC09, and eight horizons in PC11) and determined their chemical compositions using an inductively coupled plasma quadrupole mass spectrometer. Note that the analytical results represent the bulk chemical composition of multiple micronodules (~5 to 15 mg of the micronodules per sampling horizon were used for acid digestion), not that of a single sample.…”

Section: Samples and Datamentioning

confidence: 99%

“…Note that the analytical results represent the bulk chemical composition of multiple micronodules (~5 to 15 mg of the micronodules per sampling horizon were used for acid digestion), not that of a single sample. All chemical composition data have been presented in Yasukawa et al [37]. Locations of the study sites modified from [10] and [37].…”

Section: Samples and Datamentioning

confidence: 99%

“…All chemical composition data have been presented in Yasukawa et al [37]. Locations of the study sites modified from [10] and [37]. Figure 1.…”

Section: Samples and Datamentioning

confidence: 99%

“…Yasukawa et al [37] reported that Fe-Mn micronodules in the deep-sea sediments south of Minamitorishima Island, including the extremely REY-rich mud, have a diagenetic origin and contain up to 2900 ppm Co, 7200 ppm Cu, and 39,000 ppm Ni. Although the authors did not investigate these Fe-Mn micronodules from a paleoceanographic perspective, these geochemical features could be indicators of the environmental conditions during the formation of the extremely REY-rich mud.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Stratigraphic Variations of Fe–Mn Micronodules and Implications for the Formation of Extremely REY-Rich Mud in the Western North Pacific Ocean

et al. 2021

Self Cite

View full text Add to dashboard Cite

The origin of deep-sea sediments in the western North Pacific Ocean, which are significantly enriched in rare-earth elements and yttrium (REY), and its paleoceanographic implications have been poorly constrained. Here, we investigated stratigraphic variations in the chemical compositions and textures of ferromanganese (Fe–Mn) micronodules separated from western North Pacific sediments. The characteristics of the micronodules of an extremely REY-rich mud layer vary from almost purely diagenetic to relatively hydrogenetic. This indicates the abundant supply of organic matter to the sediment together with fish debris that accumulates REY at the onset of the REY-enrichment of the mud, followed by the exposure of the seafloor to oxic water masses during the latter half of the formation of the REY-rich mud. These results support a previously proposed formation mechanism based on which enhanced bottom water currents caused pelagic fish proliferation via the upwelling of nutrients and fish debris was physically sorted and selectively accumulated on the seafloor. After the main REY-enrichment, the micronodules exhibit varying diagenetic signatures, suggesting changes in the bottom current intensities after the main REY-enrichment. However, the bulk REY contents do not increase. This implies that a sufficient increase in the fish productivity is an essential factor affecting the formation of REY-rich mud.

show abstract

Section: Samples and Datamentioning

confidence: 99%

Section: Samples and Datamentioning

confidence: 99%

“…All chemical composition data have been presented in Yasukawa et al [37]. Locations of the study sites modified from [10] and [37]. Figure 1.…”

Section: Samples and Datamentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Stratigraphic Variations of Fe–Mn Micronodules and Implications for the Formation of Extremely REY-Rich Mud in the Western North Pacific Ocean

et al. 2021

Self Cite

View full text Add to dashboard Cite

show abstract

“…After these technical clarifications, a realistic economic feasibility analysis will be conducted. We note that although detailed and useful geological data of REE-rich mud have already been published [82][83][84][85], the geotechnical data corresponding to geological variations are not available currently.…”

Section: Technical Considerationsmentioning

confidence: 99%

Combined Mining and Pulp-Lifting of Ferromanganese Nodules and Rare-Earth Element-Rich Mud around Minamitorishima Island in the Western North Pacific: A Prefeasibility Study

et al. 2021

View full text Add to dashboard Cite

An examination of the technical and economic feasibility of the combined mining of the rare-earth element-rich mud (REE-rich mud) and ferromanganese nodules (FN) around Minamitorishima (Marcus) Island in Northwest Pacific is introduced. A previous study showed that the mining of REE-rich mud around Minamitorishima Island was not economically feasible. Therefore, in this study, three changes from the previous mining model to improve its economy are proposed. The first one is combined mining with FN in the area. The second one is introducing a pulp-lifting system that can lift both REE-rich mud and FN at high concentrations through a riser pipe. The third one is the reuse of waste mud and processed slag for construction materials. The economic evaluation results show a change from a slightly negative to quite positive economy depending on the mixing ratio of REE-rich mud and FN in the pulp-lifting. In addition, some technical approaches necessary to realize the combined mining method are introduced.

show abstract

Distribution of REY-Rich Mud in Deep-Sea Sediments from the Magellan Seamount Trail Zone in the Northwestern Pacific

Lee,

Kim,

Hyeong

2024

Ocean Sci. J.

View full text Add to dashboard Cite

Geochemical features of Fe-Mn micronodules in deep-sea sediments of the western North Pacific Ocean: Potential for co-product metal extraction from REY-rich mud

Cited by 37 publications

References 75 publications

Stratigraphic Variations of Fe–Mn Micronodules and Implications for the Formation of Extremely REY-Rich Mud in the Western North Pacific Ocean

Stratigraphic Variations of Fe–Mn Micronodules and Implications for the Formation of Extremely REY-Rich Mud in the Western North Pacific Ocean

Combined Mining and Pulp-Lifting of Ferromanganese Nodules and Rare-Earth Element-Rich Mud around Minamitorishima Island in the Western North Pacific: A Prefeasibility Study

Distribution of REY-Rich Mud in Deep-Sea Sediments from the Magellan Seamount Trail Zone in the Northwestern Pacific

Contact Info

Product

Resources

About