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Дубинин, А. В.; Sval'nov, Vyacheslav N

doi:10.1023/a:1023420324531

Cited by 21 publications

(5 citation statements)

References 15 publications

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“…The features of the Fe-Mn micronodules support the previously proposed enhancement of bottom currents during the formation of the extremely REY-rich mud [35,36,53]. This reinforces the importance of micronodules as effective indicators of the sedimentation environments of oxic pelagic sediments [1][2][3][4][5][6][7][8][9].…”

Section: Implications For the Genesis Of Extremely Rey-rich Mudsupporting

confidence: 79%

“…They are submillimeter-sized particles that are mainly composed of Fe-Mn (oxyhydr)oxides and rich in multiple transition metals with significantly varying abundances, reflecting environmental factors such as redox conditions. Thus, they are expected to be effective indicators of the sedimentary environment in the pelagic realm [1][2][3][4][5][6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

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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

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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.

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Section: Implications For the Genesis Of Extremely Rey-rich Mudsupporting

confidence: 79%

Section: Introductionmentioning

confidence: 99%

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

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“…Their study sites as well as ours are all located in basins neighboring mid-ocean ridges, thus the results adds to the growing evidence that REY are bound primarily to apatites, even in the oceans under significant influence of hydrothermal plume (Kashiwabara et al, 2018). (Zhang & Nozaki, 1996), hydrothermal plume particulates from a vent at 9°45′N on the East Pacific Rise (EPR; Sherrell et al, 1999), micronodules (Dubinin & Sval'nov, 2000, 2003, Dubinin et al, 2008Liao, Sun, Wu, et al, 2019;Yasukawa et al, 2020;Zhou et al, 2021), and bioapatites (Kon et al, 2014;Liao, Sun, Li, et al, 2019;Takaya et al, 2018;Wang et al, 2016).…”

Section: Discussionsupporting

confidence: 63%

“…Micronodules from the CCFZ are known to have high Mn/Fe ratios ranging from 3.5 to 20 (Dekov et al, 2021;Dubinin & Sval'nov, 2003;Jeong et al, 1994), meaning that they consist primarily of Mn-oxides rather than Fe-(oxyhydr)oxides. However, Mn content shows a poor correlation with ∑REY in bulk composition (Pearson R 2 = 0.16; Figure 4d).…”

Section: Discussionmentioning

confidence: 99%

“…Data for leachates of steps 4 and 5 are not presented, as they could not be calculated with confidence because of the low concentrations of REY. (e) REY patterns of Pacific deep seawater(Zhang & Nozaki, 1996), hydrothermal plume particulates from a vent at 9°45′N on the East Pacific Rise (EPR;Sherrell et al, 1999), micronodules(Dubinin & Sval'nov, 2000, 2003, Dubinin et al, 2008Liao, Sun, Wu, et al, 2019;Yasukawa et al, 2020;Zhou et al, 2021), and bioapatites(Kon et al, 2014;Liao, Sun, Li, et al, 2019;Takaya et al, 2018;Wang et al, 2016).…”

mentioning

confidence: 99%

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Distribution of Rare Earth Elements and Yttrium in Sediments From the Clarion‐Clipperton Fracture Zone, Northeastern Pacific Ocean

Kim

Hyeong

Yoo

2022

Geochem Geophys Geosyst

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Deep‐sea sediments enriched in rare earth elements and yttrium (REY) are attracting scientific and exploration attention as a new REY resource. In the Clarion‐Clipperton Fracture Zone (CCFZ) of the northeastern Pacific, sedimentary units with high REY contents (average REY content >700 ppm) occur sporadically at only a few decimeters beneath the sediment surface covered with polymetallic nodules. Here we report the results of bulk chemical and sequential extraction analyses of sediment cores containing these units, collected from the southeastern part of the CCFZ. Correlations between element contents and shale‐normalized REY patterns suggest that the REY are associated primarily with calcium phosphates. Sequential extraction to determine the contribution from different sedimentary components confirms that calcium phosphates contain >70% of trivalent REY in REY‐enriched units. Despite the study location being favorable for nodule formation and subject to distal hydrothermal plume fallout, only subordinate amounts of REY are hosted by Mn‐ and Fe‐(oxyhydr)oxides. Hydrothermal Fe‐(oxyhydr)oxides may have played a more important role in accumulating REY, as evidence suggest that large amounts of Fe‐(oxyhydr)oxides have been transformed into Fe‐rich smectite during early diagenesis of REY‐enriched units.

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Rare earth elements (REE) and isotope composition (δ13C and δ18O) of manganese ores of Chiatura deposit (Georgia): features of ore formation and genesis

et al. 2023

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Cited by 21 publications

References 15 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

Distribution of Rare Earth Elements and Yttrium in Sediments From the Clarion‐Clipperton Fracture Zone, Northeastern Pacific Ocean

Rare earth elements (REE) and isotope composition (δ13C and δ18O) of manganese ores of Chiatura deposit (Georgia): features of ore formation and genesis

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