Bender, Michael L; Ku, Teh-Lung; Broecker, Wallace S (2022): Accumation rates of manganese in manganese nodules using differential 230Th-231Pa activities [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.949668, In: Bender, ML et al. (2022): Accumulation rates of manganese in pelagic sediments and nodules [dataset bundled publication]. PANGAEA, https://doi.org/10.1594/PANGAEA.949670
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Abstract:
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.
Related to:
Bender, Michael L; Ku, Teh-Lung; Broecker, Wallace S (1970): Accumulation rates of manganese in pelagic sediments and nodules. Earth and Planetary Science Letters, 8(2), 143-148, https://doi.org/10.1016/0012-821X(70)90164-0
Source:
Grant, John Bruce; Moore, Carla J; Alameddin, George; Chen, Kuiying; Barton, Mark (1992): The NOAA and MMS Marine Minerals Geochemical Database. National Geophysical Data Center, NOAA, https://doi.org/10.7289/V52Z13FT
Further details:
Warnken, Robin R; Virden, William T; Moore, Carla J (1992): The NOAA and MMS Marine Minerals Bibliography. National Geophysical Data Center, NOAA, https://doi.org/10.7289/V53X84KN
Project(s):
Coverage:
Median Latitude: -5.002371 * Median Longitude: -152.882839 * South-bound Latitude: -55.000000 * West-bound Longitude: 62.600000 * North-bound Latitude: 34.900000 * East-bound Longitude: -24.683300
Date/Time Start: 1959-11-27T00:00:00 * Date/Time End: 1965-09-23T00:00:00
Minimum Elevation: -5954.0 m * Maximum Elevation: -1937.0 m
Event(s):
ELT17.036-BT * Latitude: -55.000000 * Longitude: -94.900000 * Date/Time: 1965-01-01T00:00:00 * Elevation: -4433.0 m * Location: Southern Ocean * Campaign: ELT17 * Basis: Eltanin * Method/Device: Trawl net (TRAWL)
Comment:
From 1983 until 1989 NOAA-NCEI compiled the NOAA-MMS Marine Minerals Geochemical Database from journal articles, technical reports and unpublished sources from other institutions. At the time it was the most extended data compilation on ferromanganese deposits world wide. Initially published in a proprietary format incompatible with present day standards it was jointly decided by AWI and NOAA to transcribe this legacy data into PANGAEA. This transfer is augmented by a careful checking of the original sources when available and the encoding of ancillary information (sample description, method of analysis...) not present in the NOAA-MMS database.
This dataset represents the digitized Table 2 - Part 1, pp. 145 of the related publication.
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Event label | Event | Bender, Michael L | |||
| 2 | Latitude of event | Latitude | Bender, Michael L | |||
| 3 | Longitude of event | Longitude | Bender, Michael L | |||
| 4 | Elevation of event | Elevation | m | Bender, Michael L | ||
| 5 | Identification | ID | Bender, Michael L | |||
| 6 | Deposit type | Deposit type | Bender, Michael L | |||
| 7 | Manganese | Mn | % | Bender, Michael L | Neutron activation analysis | in calcium carbonate free part |
| 8 | Accumulation rate, manganese | Acc rate Mn | g/cm2/ka | Bender, Michael L | see description in data abstract |
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
32 data points