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  • 2020-2024  (7)
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  • 1
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    Accumation rates of manganese in a pelagic sediment core using 231Pa activity (2022)
    PANGAEA
    Details
    Publication Date: 2023-08-28
    Description: For a pelagic sediment core taken in the Atlantic Ocean, The decrease of unsupported 231Pa was used for the determination of the accretion rate. Because CaCO3 is a Mn-free diluent, the Mn concentration results and the sediment accumulation rate results are given on a carbonate-free basis. CaCO3 content ofcores raised from below the carbonate compensation level is taken as zero. The in situ density of water-free deep-sea cores was assumed to be 0.7 g/cm³ , this could lead in some cases to an error.
    Keywords: Accumulation rate, manganese; Accumulation rate, non carbonate; Depth, bottom/max; DEPTH, sediment/rock; Depth, top/min; Elevation of event; Geochemistry; Identification; Latitude of event; Longitude of event; Manganese; manganese micronodule; manganese nodule; Neutron activation analysis; NOAA and MMS Marine Minerals Geochemical Database; NOAA-MMS; ocean; PC; Piston corer; RC07; RC0701-RC0708; RC07-4; Robert Conrad; sediment; Sediment type; see description in data abstract
    Type: Dataset
    Format: text/tab-separated-values, 7 data points
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    DATA PANGAEA
  • 2
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    Accumation rates of manganese in pelagic sediments using 130Th activity (2022)
    PANGAEA
    Details
    Publication Date: 2023-08-28
    Description: For 7 pelagic sediment cores, the decrease in unsupported 130Th activity with depth in the core was used to establish the mean accumulation rate over the last 300 000 years. Because CaCO3 is a Mn-free diluent, the Mn concentration results and the sediment accumulation rate results are given on a carbonate-free basis. CaCO3 content ofcores raised from below the carbonate compensation level is taken as zero. The in situ density of water-free deep-sea cores was assumed to be 0.7 g/cm³ , this could lead in some cases to an error.
    Keywords: Accumulation rate, manganese; Accumulation rate, non carbonate; Calcium carbonate; Depth, bottom/max; DEPTH, sediment/rock; Depth, top/min; Elevation of event; Event label; Geochemistry; Identification; Latitude of event; Longitude of event; Manganese; manganese micronodule; manganese nodule; Neutron activation analysis; NOAA and MMS Marine Minerals Geochemical Database; NOAA-MMS; ocean; PC; Piston corer; RC08; RC08-83; Robert Conrad; sediment; Sediment type; see description in data abstract; V10; V10-95; V12; V12-122; V16; V16-21; V16-75; V18; V18-258; V21; V21-48; Vema; Wet chemistry
    Type: Dataset
    Format: text/tab-separated-values, 52 data points
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    DATA PANGAEA
  • 3
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    Accumation rates of manganese in manganese nodules using total alpha activity (2022)
    PANGAEA
    Details
    Publication Date: 2023-08-28
    Description: The manganese content of 4 manganese nodules was determined by atomic absorption. The decrease of total alpha activity was used to evaluate Mn accumulation. Because CaCO3 is a Mn-free diluent, the Mn concentration results and the nodules accumulation rate results are given on a carbonate-free basis. Nodule densities were assumed to be 2.5 g/cm³. The Mn accumulation rates are calculated per unit cross sectional area of the nodule rather than per unit surface area.
    Keywords: Accumulation rate, manganese; Atlantic Ocean; Atomic absorption spectrophotometry; CH05801; CH58-9RD; Chain; Deposit type; DOWNWIND-H; Dredge; Dredge, chain bag; DRG; DRG_C; DWHD47; Elevation of event; Event label; FANB01BD; FANBD-20D; FANFARE-B; Geochemistry; Horizon; Identification; Latitude of event; Longitude of event; Manganese; manganese micronodule; manganese nodule; NOAA and MMS Marine Minerals Geochemical Database; NOAA-MMS; Northern_Holiday; North-West Pacific Ocean; NTHL02HO-010PH; NTHL-10; ocean; Pacific Ocean; sediment; see description in data abstract; Spencer F. Baird; Sta 100; Wired profile sonde; WP
    Type: Dataset
    Format: text/tab-separated-values, 15 data points
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    DATA PANGAEA
  • 4
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    Accumulation rates of manganese in pelagic sediments and nodules (2022)
    PANGAEA
    Details
    Publication Date: 2023-08-28
    Description: Accumulation rates of manganese in sediments of thirty-eight deep-sea cores range from 0.1 to 3.4 mg/cm²/ka. Manganese accumulation rates in five nodules range from 0.2 to 1.0 mg/cm²/ka. In the North Pacific, manganese is apparently incorporated into sediments in association with clay or a related phase; in other ocean basins, no generalizations can be drawn from the data presented here. The similarity between nodule and sediment manganese accumulation rates could be coincidence or could reflect the possibility that nodules and sediments accumulate manganese by the same mechanism.
    Keywords: Accumulation rate; Geochemistry; manganese; NOAA and MMS Marine Minerals Geochemical Database; NOAA-MMS; ocean; sediment
    Type: Dataset
    Format: application/zip, 6 datasets
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    DATA PANGAEA
  • 5
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    Accumation rates of manganese in pelagic sediments using Ericson paleontological boundaries (2022)
    PANGAEA
    Details
    Publication Date: 2023-08-28
    Description: For 4 pelagic sediment cores taken in the Atlantic Ocean, Ericson's paleontologic boundaries X-Y (75 000 yr) and Y-Z (11 000 yr) were used. The age of the upper boundary was determined by 14C dating and that of the lower by extrapolation. Because CaCO3 is a Mn-free diluent, the Mn concentration results and the sediment accumulation rate results are given on a carbonate-free basis. CaCO3 content ofcores raised from below the carbonate compensation level is taken as zero. The in situ density of water-free deep-sea cores was assumed to be 0.7 g/cm³ , this could lead in some cases to an error.
    Keywords: Accumulation rate, manganese; Accumulation rate, non carbonate; AT153; AT153-146P; AT157; AT157-005P; AT164; AT164-023P; AT180; AT180-039P; Atlantic Ocean; Atlantis (1931); Calcium carbonate; Depth, bottom/max; DEPTH, sediment/rock; Depth, top/min; Elevation of event; Event label; Geochemistry; Identification; Latitude of event; Longitude of event; Manganese; manganese micronodule; manganese nodule; Neutron activation analysis; NOAA and MMS Marine Minerals Geochemical Database; NOAA-MMS; ocean; PC; Piston corer; sediment; Sediment type; see description in data abstract; Wet chemistry
    Type: Dataset
    Format: text/tab-separated-values, 32 data points
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    DATA PANGAEA
  • 6
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    Accumation rates of manganese in pelagic sediments using Brunnes-Matuyama magnetic reversal boundary (2022)
    PANGAEA
    Details
    Publication Date: 2024-02-29
    Description: For 27 pelagic sediment cores, the Brunnes-Matuyama magnetic reversal boundary (700 000 yr) was used to establish the mean sedimentation rate between this level and the core top. If the tops of these cores were lost, calculated sedimentation rates would be a few percent less than the true rates. Because CaCO3 is a Mn-free diluent, the Mn concentration results and the sediment accumulation rate results are given on a carbonate-free basis. CaCO3 content of cores raised from below the carbonate compensation level is taken as zero. The in situ density of water-free deep-sea cores was assumed to be 0.7 g/cm³ , this could lead in some cases to an error.
    Keywords: Accumulation rate, manganese; Accumulation rate, non carbonate; Calcium carbonate; Depth, bottom/max; DEPTH, sediment/rock; Depth, top/min; Elevation of event; Event label; Geochemistry; Identification; Latitude of event; Longitude of event; Manganese; manganese micronodule; manganese nodule; Neutron activation analysis; NOAA and MMS Marine Minerals Geochemical Database; NOAA-MMS; ocean; PC; Piston corer; RC08; RC08-52; RC08-53; RC10; RC10-157; RC10-159; RC10-181; RC10-182; Robert Conrad; sediment; Sediment type; see description in data abstract; V16; V16-132; V16-133; V16-134; V16-39; V16-57; V16-60; V16-66; V16-70; V18; V18-72; V19; V19-116; V20; V20-107; V20-184; V20-247; V21; V21-63; V21-65; V21-67; V21-70; V21-71; V21-73; V29; V29-108; Vema; Wet chemistry
    Type: Dataset
    Format: text/tab-separated-values, 191 data points
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  • 7
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    Accumation rates of manganese in manganese nodules using differential 230Th-231Pa activities (2022)
    PANGAEA
    Details
    Publication Date: 2024-02-29
    Description: The manganese content of 7 manganese nodules was determined by neutron activation. The decrease of unsupported 231Pa and 230Th in the outer few tenths of millimeters was used to evaluate Mn accumulation. Because CaCO3 is a Mn-free diluent, the Mn concentration results and the nodules accumulation rate results are given on a carbonate-free basis. Nodule densities were assumed to be 2.5 g/cm³. The Mn accumulation rates are calculated per unit cross sectional area of the nodule rather than per unit surface area.
    Keywords: Accumulation rate, manganese; Atlantic Ocean; Deposit type; Dredge; Dredge, rock; DRG; DRG_R; Elevation of event; ELT17; ELT17.036-BT; Eltanin; Event label; Geochemistry; Identification; Indian Ocean; Latitude of event; Longitude of event; Manganese; manganese micronodule; manganese nodule; Neutron activation analysis; NOAA and MMS Marine Minerals Geochemical Database; NOAA-MMS; ocean; Pacific Ocean; PC; Piston corer; sediment; see description in data abstract; Southern Ocean; TRAWL; Trawl net; V16; V16-19SBT; V16-3SBT; V18; V18-32RD; V20; V20-4RD; V21; V21-2RD; V21-71; Vema
    Type: Dataset
    Format: text/tab-separated-values, 32 data points
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    DATA PANGAEA
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