Reyss, Jean-Louis; Lemaitre, Nathalie; Ku, Teh-Lung; Marchig, Vesna; Southon, John R; Nelson, D Erle; Vogel, John S (2022): U-Th isotopes and Fe-Mn composition of layers from the bottom side of Mn nodule SO11_262DK (262GBHF) [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.943684, In: Reyss, J-L et al. (2022): Growth of a manganese nodule from Peru Basin: A radiochemical anatomy [dataset bundled publication]. PANGAEA, https://doi.org/10.1594/PANGAEA.943688
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Abstract:
Attempts have been made to study the entire growth history of a manganese nodule from the northern part of Peru Basin in the Pacific using radiochemical profiles of 230Th232Th, 227Th230Th, and 10Be9Be. Combined with the observations on Fe-Mn contents and textural variation, the radiochemical data indicate that the nodule grew more or less concentrically throughout most of its existence since it formed 1.5 my ago, receiving Mn from both bottom water and pore water. This condition appeared to have changed about 180 ky ago when the growth became asymmetric in that the top and bottom sides became fixed in their relative positions on the sea floor. Since then, the bottom side accreted with a fast rate of close to 200 mm/my, apparently fueled by the supply of diagenetically remobilized Mn in pore water from the sediment substrate. In the meantime, the top side accumulated at about 6 mm/my, a value which is in the normal range for deep-sea nodules having their Mn supplied from the hydrogenous source.
Related to:
Reyss, Jean-Louis; Lemaitre, Nathalie; Ku, Teh-Lung; Marchig, Vesna; Southon, John R; Nelson, D Erle; Vogel, John S (1985): Growth of a manganese nodule from Peru Basin: A radiochemical anatomy. Geochimica et Cosmochimica Acta, 49(11), 2401-2408, https://doi.org/10.1016/0016-7037(85)90240-6
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:
Latitude: -7.150000 * Longitude: -92.000000
Date/Time Start: 1979-09-01T00:00:00 * Date/Time End: 1979-09-01T00:00:00
Minimum DEPTH, sediment/rock: 0 m * Maximum DEPTH, sediment/rock: 0 m
Event(s):
Comment:
Digitized Table 1 and 3B, Page 2404;
230Th Excess = 230Th - 234U; 227Th Excess = 227Th - 0.046 * 238U
Because of the relatively fast growth rate in this portion of the nodule (ca. 190 m/my), the excess values are derived by an iterative procedure.
Points of measurements are illustrated in Fig. 1.
.
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.
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Identification | ID | Reyss, Jean-Louis | Alpha spectrometry | ||
| 2 | Latitude of event | Latitude | ||||
| 3 | Longitude of event | Longitude | ||||
| 4 | Elevation of event | Elevation | m | |||
| 5 | DEPTH, sediment/rock | Depth sed | m | Reyss, Jean-Louis | Alpha spectrometry | Geocode |
| 6 | Distance | Dist | mm | Reyss, Jean-Louis | Alpha spectrometry | |
| 7 | Distance, minimum | Dist min | mm | Reyss, Jean-Louis | Alpha spectrometry | |
| 8 | Distance, maximum | Dist max | mm | Reyss, Jean-Louis | Alpha spectrometry | |
| 9 | Uranium-234 | 234U | dpm/g | Reyss, Jean-Louis | Alpha spectrometry | |
| 10 | Uranium-234, standard deviation | 234U std dev | ± | Reyss, Jean-Louis | Alpha spectrometry | |
| 11 | Uranium-234/Uranium-238 activity ratio | (234U/238U) | Reyss, Jean-Louis | Alpha spectrometry | ||
| 12 | Uranium-234/Uranium-238 activity ratio, standard deviation | (234U/238U) std dev | ± | Reyss, Jean-Louis | Alpha spectrometry | |
| 13 | Thorium-232 | 232Th | dpm/g | Reyss, Jean-Louis | Alpha spectrometry | |
| 14 | Thorium-232, standard deviation | 232Th std dev | ± | Reyss, Jean-Louis | Alpha spectrometry | |
| 15 | Thorium-230 | 230Th | dpm/g | Reyss, Jean-Louis | Alpha spectrometry | |
| 16 | Thorium-230, standard deviation | 230Th std dev | ± | Reyss, Jean-Louis | Alpha spectrometry | |
| 17 | Thorium-227 | 227Th | dpm/g | Reyss, Jean-Louis | Alpha spectrometry | |
| 18 | Thorium-227, standard deviation | 227Th std dev | ± | Reyss, Jean-Louis | Alpha spectrometry | |
| 19 | Thorium-230 excess/Thorium-232 activity ratio | (230Th xs/232Th) | Reyss, Jean-Louis | Alpha spectrometry | ||
| 20 | Thorium-230 excess/Thorium-232 activity ratio, standard deviation | (230Th xs/232Th) std dev | ± | Reyss, Jean-Louis | Alpha spectrometry | |
| 21 | Thorium-227 excess/Thorium-230 excess activity ratio | (227Th xs/230Th xs) | Reyss, Jean-Louis | Alpha spectrometry | ||
| 22 | Thorium-227 excess/Thorium-230 excess activity ratio, standard deviation | (227Th xs/230Th xs) std dev | ± | Reyss, Jean-Louis | Alpha spectrometry | |
| 23 | Manganese | Mn | % | Reyss, Jean-Louis | Alpha spectrometry | |
| 24 | Iron | Fe | % | Reyss, Jean-Louis | Alpha spectrometry | |
| 25 | Deposit type | Deposit type | Reyss, Jean-Louis | Alpha spectrometry |
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
243 data points