Bonté, Philippe (2022): Radiochemical data for layers inside manganese crusts retrieved during the ROMANCHA campaign of the R/V Jean Charcot on the Romanche trench area (Atlantic ocean) [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.949944, In: Bonté, P (2022): Relationships between the Fe-Mn deposits from the Romanche Trench and its hydrothermal environment [dataset bundled publication]. PANGAEA, https://doi.org/10.1594/PANGAEA.949950
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Abstract:
Radiochemical analyses have been performed on micro-samples extracted from various surface and inside layers of manganese crusts covering basalt or volcanic breccia rocks (see, Table Annex7-B). Non manganese oxide parts consisting essentially of the surrounding carbonate sediment inlays have been separated using hydrofluoric acid. After processing the samples have been dissecated at 110 Celsius and prepared as an aliquot from which a part is used for radiometric measurements using Alpha spectrometry and the other part is used for uranium-238 and thorium-232 using co-solvant precipitation.
Related to:
Bonté, Philippe (1981): Relations entre l'environnement et les caractéristiques des concrétions polymétalliques marines dans la fosse de la Romanche [dissertation]. Université Paris XI Orsay, Orsay, France, 243 pp, 13677600.pdf
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: -0.023166 * Median Longitude: -18.508555 * South-bound Latitude: -0.085833 * West-bound Longitude: -18.543333 * North-bound Latitude: 0.051667 * East-bound Longitude: -18.490000
Date/Time Start: 1977-12-08T00:00:00 * Date/Time End: 1977-12-14T00:00:00
Minimum Elevation: -4970.0 m * Maximum Elevation: -3640.0 m
Event(s):
RMA-CH80-DR01 * Latitude: 0.051667 * Longitude: -18.543333 * Date/Time: 1977-12-08T00:00:00 * Elevation: -3640.0 m * Campaign: ROMANCHA * Basis: Jean Charcot * Method/Device: Dredge (DRG)
RMA-CH80-DR03 * Latitude: -0.035333 * Longitude: -18.492333 * Date/Time: 1977-12-09T00:00:00 * Elevation: -4300.0 m * Campaign: ROMANCHA * Basis: Jean Charcot * Method/Device: Dredge (DRG)
RMA-CH80-DR10 * Latitude: -0.085833 * Longitude: -18.490000 * Date/Time: 1977-12-14T00:00:00 * Elevation: -4970.0 m * Campaign: ROMANCHA * Basis: Jean Charcot * Method/Device: Dredge (DRG)
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 17, page 116 of the related publication.
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It is worth noting that in this table the author has ratioed isotope concentrations (ex: 230TH/232Th) while measuring each of them using inherently different methods (ex: 230Th using Alpha spectrometry and 232Th using Wet chemistry determination). Thus these terms have been labeled as plain "ratio" rather than "activity ratio".
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Event label | Event | Bonté, Philippe | |||
| 2 | Latitude of event | Latitude | Bonté, Philippe | |||
| 3 | Longitude of event | Longitude | Bonté, Philippe | |||
| 4 | Elevation of event | Elevation | m | Bonté, Philippe | ||
| 5 | Sample ID | Sample ID | Bonté, Philippe | |||
| 6 | Deposit type | Deposit type | Bonté, Philippe | |||
| 7 | Sample surface | Samp surf | cm2 | Bonté, Philippe | ||
| 8 | Distance | Dist | mm | Bonté, Philippe | ||
| 9 | Distance, minimum | Dist min | mm | Bonté, Philippe | ||
| 10 | Distance, maximum | Dist max | mm | Bonté, Philippe | ||
| 11 | Uranium-238 | 238U | mg/kg | Bonté, Philippe | Wet chemistry | |
| 12 | Uranium-238, standard deviation | 238U std dev | ± | Bonté, Philippe | Wet chemistry | |
| 13 | Uranium-234 | 234U | dpm/g | Bonté, Philippe | Alpha spectrometry | |
| 14 | Uranium-234, standard deviation | 234U std dev | ± | Bonté, Philippe | Alpha spectrometry | |
| 15 | Uranium-234/Uranium-238 ratio | 234U/238U | Bonté, Philippe | |||
| 16 | Uranium-234/Uranium-238 ratio, standard deviation | 234U/238U std dev | ± | Bonté, Philippe | ||
| 17 | Thorium-232 | 232Th | mg/kg | Bonté, Philippe | Wet chemistry | |
| 18 | Thorium-232, standard deviation | 232Th std dev | ± | Bonté, Philippe | Wet chemistry | |
| 19 | Thorium-230 | 230Th | dpm/g | Bonté, Philippe | Alpha spectrometry | |
| 20 | Thorium-230, standard deviation | 230Th std dev | ± | Bonté, Philippe | Alpha spectrometry | |
| 21 | Thorium-230/Thorium-232 ratio | 230Th/232Th | Bonté, Philippe | |||
| 22 | Sample mass | Samp m | g | Bonté, Philippe | Wet chemistry |
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
162 data points