Geochemistry of rare earth elements in micro-and macronodules from the pacific bioproductive zone

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

doi:10.1007/bf02788282

Cited by 24 publications

(11 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, the network bands have a higher average concentration of REE than the nodules in both samples. Such phenomenon is in contrast to the results from investigations of phosphate (e.g., Kidder et al, 2003) and ferromanganese nodules (e.g., Pattan and Parthiban, 2011), although Dubinin and Sval'nov (2000) reported REE enrichment in Pacific Ocean clays compared with ferromanganese micro-and macro-nodules. The lower concentration of total REE in the Pagoda nodules compared with the inter-nodule networks could be attributed to the higher clay content in the latter, as suggested by greater K and Al concentrations.…”

Section: Major and Trace Element Analysiscontrasting

confidence: 81%

Meganodular limestone of the Pagoda Formation: A time-specific carbonate facies in the Upper Ordovician of South China

Zhan

Jin

et al. 2016

Palaeogeography, Palaeoclimatology, Palaeoecology

View full text Add to dashboard Cite

Section: Major and Trace Element Analysiscontrasting

confidence: 81%

Meganodular limestone of the Pagoda Formation: A time-specific carbonate facies in the Upper Ordovician of South China

Zhan

Jin

et al. 2016

Palaeogeography, Palaeoclimatology, Palaeoecology

View full text Add to dashboard Cite

“…The mass of MN1 and MN2 is always dominated by fraction 100-250 µ m. This is consistent with the fraction distribution in sediments of another Pacific unproductive zone located in the South Pacific Basin (Dubinin and Sval'nov, 2000b). As was mentioned above, authigenic Fe-Mn oxyhydroxide microsegregations in sediments from horizons 0-10 and 240-250 cm are represented by two varieties with the dull (MN1) and lustrous (MN2) surface.…”

Section: Ferromanganese Nodule and Ferruginous Crustsupporting

confidence: 88%

“…The crust is likely related to postsedimentary diagenetic processes leading to reduction of Mn and loss of a considerable portion of microelements from the iron oxyhydroxides in the course of their recrystallization (or even partial dissolution). Micronodules from the unproductive zone are characterized by increase in the hydrogenous sedimentary components in sediments with intensification of the influence of the source of water-suspended material and increase in fraction size (Dubinin and Sval'nov, 2000b). Local variation in the input of organic matter during diagenesis can be related to the activity of benthic organisms.…”

Section: Discussionmentioning

confidence: 99%

10.1007/s10987-008-2001-7

2000

CrossRef Listing of Deleted DOIs

View full text Add to dashboard Cite

Authigenic ferromanganese formations in sediments from two horizons (0-10 and 240-250 cm) located in the low/high bioproductive transitional zone of the Pacific Ocean were studied. In addition to the compositionally different two types of micronodules, crusts and ferromanganese nodules were detected in the surface horizon (0-1 cm). Three size fractions (50-100, 100-250, and 250-500 µ m) of manganese micronodules were investigated. In terms of surface morphology, color, and shape, the micronodules are divided into the dull round (MN1) and angular lustrous (MN2) varieties with different mineral and chemical compositions. The dull MN1 are enriched in Mn and depleted in Fe as compared with the lustrous MN2. The Mn/Fe value in the dull MN1 varies from 13 to 14. Asbolane-buserite and birnessite are the major manganese minerals in them. The lustrous MN2 is mainly composed of vernadite with Mn/Fe = 4.3-4.8. Relative to the dull MN1, fraction 50-100 µ m of the lustrous MN2 is enriched in Fe (2.6 times), W (1.8), Mo (3.2), Th (2.3), Ce (5.8), and REE (1.2-1.8).Relative to counterparts from the dull MN1, separate fractions of the lustrous MN2 are characterized by a greater compositional difference. For example, increase in the size of micronodules leads to decrease in contents of the following elements: Fe (by 10 rel %), Ce (2 times), W (2.1 times), Mo (2.2 times), and Co (1.5 times). At the same time, one can see increase in contents of other elements: Th and Cu (2.1 times), Ni (1.9 times), and REE (1.2-1.6 times). Differences in the chemical and mineral compositions of MN1 and MN2 fractions can be related to alternation of oxidative and suboxidative conditions in the sediments owing to the input of a labile organic matter, which serves as the major reducer, and the allochthonous genesis of MN2.

show abstract

“…Co (4) whereas REE (0.96), Al (0.54) and Fe (0.25) are enriched in the associated sediments (Dubinin and Sval'nov, 2000). Atlantic Ocean nodule-sediment pairs also showed highest enrichment ratio with Mn (30), followed by Th (8), P (4.5), REE (4.7) and Fe (2.8), whereas only Al is enriched in the associated sediments (Dubinin and Rozanov, 2001).…”

Section: Elements Enrichment Ratiomentioning

confidence: 97%

Geochemistry of ferromanganese nodule–sediment pairs from Central Indian Ocean Basin

Pattan

Parthiban

2011

Journal of Asian Earth Sciences

View full text Add to dashboard Cite

Geochemistry of rare earth elements in micro-and macronodules from the pacific bioproductive zone

Cited by 24 publications

References 34 publications

Meganodular limestone of the Pagoda Formation: A time-specific carbonate facies in the Upper Ordovician of South China

Meganodular limestone of the Pagoda Formation: A time-specific carbonate facies in the Upper Ordovician of South China

10.1007/s10987-008-2001-7

Geochemistry of ferromanganese nodule–sediment pairs from Central Indian Ocean Basin

Contact Info

Product

Resources

About