Moore, Willard S (1984): Radionuclide analysis on nodules from MANOP Site [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.882091, Supplement to: Moore, WS (1984): Thorium and radium isotopic relationships in manganese nodules and sediments at MANOP Site S. Geochimica et Cosmochimica Acta, 48(5), 987-992, https://doi.org/10.1016/0016-7037(84)90190-X
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Abstract:
Relationships among Th and Ra isotopes in nodule, sediment and water phases at MANOP Site S establish the most likely source for Th in the nodules, the frequency of nodule turning, and the similarity of micro and macro nodules. Manganese nodules and bottom waters have 230Th/232Th activity ratios considerably higher than other phases at this site suggesting that sea water is the likely source of Th for the nodules. Similar 230Th/232Th activity ratios in nodule tops and bottoms and in certain cases departure from expected 226Ra/230Th activity ratios in nodule tops and bottoms indicate that the nodules rotate every one to ten thousand years. The micro nodules have diffusion coefficients of Ra similar to macro nodule bottoms. I suggest that they may act as a carrier phase for transporting metals through oxic sediments to nodules.
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: 11.022034 * Median Longitude: -140.092175 * South-bound Latitude: 11.016667 * West-bound Longitude: -140.106670 * North-bound Latitude: 11.025000 * East-bound Longitude: -140.078333
Date/Time Start: 1979-05-19T00:00:00 * Date/Time End: 1979-05-26T00:00:00
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1989 NOAA-NCEI compiled the NOAA-MMS Marine Minerals Geochemical Database from journal articles, technical reports and unpublished sources from other institutions.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.
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
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3 datasets
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Datasets listed in this publication series
- Moore, WS (1984): (Tables 1-2, pages 988-989) Major elements geochemistry and thorium, radium series nuclides activity measurements on manganese nodules and a ferromanganese crust from the MANOP Site S in the Pacific Ocean. https://doi.org/10.1594/PANGAEA.882088
- Moore, WS (1984): (Tables 2, page 989) Major elements geochemistry and thorium, radium series nuclides activity measurements on surface sediment manganese micronodules from the MANOP Site S in the Pacific Ocean. https://doi.org/10.1594/PANGAEA.882090
- Moore, WS (1984): (Tables 2, page 989) Major elements geochemistry and thorium, radium series nuclides activity measurements on surface sediment from the MANOP Site S in the Pacific Ocean. https://doi.org/10.1594/PANGAEA.882089