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Dubinin, Alexander V; Sval'nov, Vyacheslav N (2000): Rare earth and other element contents and speciations in samples from Core AKO26-35, Pacific Ocean, Southwest Basin [dataset publication series]. P.P. Shirshov Institute of Oceanology, Russian Academy of Sciences, Moscow, PANGAEA, https://doi.org/10.1594/PANGAEA.783336, Supplement to: Dubinin, AV; Sval'nov, VN (2000): Geochemistry of rare earth elements in ferromanganese micro- and macronodules from the Pacific non-productive zone. Translated from Litologiya i Polezyiye Iskopaemye, 2000, 6, 586-604, Lithology and Mineral Resources, 35(6), 520-537, https://doi.org/10.1023/A:1026693314236

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Abstract:
Ferromanganese micro- and macronodules in eupelagic clays at Site AKO26-35 in the Southwest Pacific Basin were studied in order to check REE distribution during ferromanganese ore formation in non-productive zones of the Pacific Ocean. Host sediments and their labile fraction, ferromanganese micronodules (in size fractions 50-100, 100-250, 250-500, and >500 ?m) from eupelagic clays (horizons 37-10, 105-110, 165-175, and 189-190 cm), and buried ferromanganese micronodules (horizons 64-68, 158-159, and 165-166 cm) were under study. Based on partition analysis data anomalous REE enrichment in eupelagic clays from Site AKO26-35 is related to accumulation of rare earth elements in iron hydroxophosphates. Concentration of Ce generally bound with manganese oxyhydroxides is governed by oxidation of Mn and Ce in ocean surface waters. Micronodules (with Mn/Fe from 0.7 to 1.6) inherit compositional features of the labile fraction of bottom sediments. Concentrations of Ce, Co, and Th depend on micronodule sizes. Enrichment of micronodules in hydrogenic or hydrothermal matter is governed by their sizes and by a dominant source of suspended oxyhydroxide material. The study of buried ferromanganese micronodules revealed general regularities in compositional evolution of oxyhydroxide matrices of ferromanganese micro- and macronodules. Compositional variation of micro- and macronodules relative to the labile fraction of sediments in the Pacific non-productive zone dramatically differs from the pattern in bioproductive zones where micronodule compositions in coarser fractions are similar to those in associated macronodules and labile fractions of host sediments due to more intense suboxidative diagenesis.
Project(s):
Archive of Ocean Data (ARCOD)
Coverage:
Latitude: -29.600000 * Longitude: -149.966700
Event(s):
AKO26-35 * Latitude: -29.600000 * Longitude: -149.966700 * Elevation: -3880.0 m * Campaign: AKO_1970-1982_USSR * Basis: Akademik Korolev * Method/Device: Gravity corer (GC)
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
6 datasets

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Datasets listed in this publication series

  1. Dubinin, AV; Sval'nov, VN (2000): (Table 1) Mass relationships between ferromanganese micronodule fractions and host sediments from Core AKO26-35. https://doi.org/10.1594/PANGAEA.783688
  2. Dubinin, AV; Sval'nov, VN (2000): (Table 2) REE partitions by different leachates in bottom sediments of Core AKO26-35. https://doi.org/10.1594/PANGAEA.783329
  3. Dubinin, AV; Sval'nov, VN (2000): (Table 3) Rare earth and other element contents in bottom sediments and Fe-Mn manifestations from Core AKO26-35. https://doi.org/10.1594/PANGAEA.783331
  4. Dubinin, AV; Sval'nov, VN (2000): (Table 4) Rare earth and other element contents in residues left after treatment of bottom sediments from Core AKO26-35 by 3.5N H2SO4 and 1M NH2OH x HCl + 25% CH3COOH. https://doi.org/10.1594/PANGAEA.783333
  5. Dubinin, AV; Sval'nov, VN (2000): (Table 5) Rare earth and other element contents in micronodules of different size fractions from bottom sediments of Core AKO26-35. https://doi.org/10.1594/PANGAEA.783335
  6. Dubinin, AV; Sval'nov, VN (2000): (Table 6) Rare earth and other element contents bound with leached fraction and with residues left after treatment of micronodules from bottom sediments of Core AKO26-35 by 1M NH2OHxHCl + 25% CH3COOH. https://doi.org/10.1594/PANGAEA.783441