Glasby, Geoffrey P; Tooms, J S; Howarth, R J (2023): Average chemical analyses of ferromanganese deposit samples from dredges taken in the Indian Ocean (Cruise D16, R.R.S. Discovery) [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.956733
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Published: 2023-03-17 • DOI registered: 2023-04-15
Abstract:
Manganese crusts and nodules were retrieved from dredges and grabs performed during Cruise D16 of R.R.S. Discovery. Samples were analysed by a combination of atomic absorption spectrometry and direct-reading optical emission spectrography. Samples were first crushed in an agate mortarand pestle to pass 300 mesh and stored in sealed Polythene tubes. 'Salting' from previoussamples was minimised by washing the mortar and pestle with HC1, de-ionised water, andacetone, and, in order to minimise the effects of sampling errors, care was taken not toincorporate the nodule nucleus into the sample. Samples were ignited at 420°c for 4 h, cooled in a desiccator. The ignited material was then prepared for analysis. All analytical results except are presented on an air-dried basis.
Related to:
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: 2.833336 * Median Longitude: 59.932502 * South-bound Latitude: 2.730000 * West-bound Longitude: 59.768340 * North-bound Latitude: 2.960000 * East-bound Longitude: 60.046670
Date/Time Start: 1967-04-01T00:00:00 * Date/Time End: 1967-04-08T04:00:00
Minimum Elevation: -4137.0 m * Maximum Elevation: -3432.0 m
Event(s):
D6249 * Latitude: 2.730000 * Longitude: 59.903340 * Date/Time: 1967-04-01T00:00:00 * Elevation: -3975.0 m * Location: Carlsberg Ridge * Campaign: D16 * Basis: Discovery (1962) * Method/Device: Dredge, rock (DRG_R) * Comment: Institute: NIO, Wormley
D6252 * Latitude: 2.772500 * Longitude: 59.861670 * Date/Time: 1967-04-02T00:00:00 * Elevation: -3775.0 m * Location: Carlsberg Ridge * Campaign: D16 * Basis: Discovery (1962) * Method/Device: Dredge, rock (DRG_R) * Comment: Institute: NIO, Wormley
D6253 * Latitude: 2.799170 * Longitude: 59.842500 * Date/Time: 1967-04-02T00:00:00 * Elevation: -3563.0 m * Location: Carlsberg Ridge * Campaign: D16 * Basis: Discovery (1962) * Method/Device: Dredge, rock (DRG_R) * Comment: Institute: NIO, Wormley
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.
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Event label | Event | ||||
| 2 | Latitude of event | Latitude | ||||
| 3 | Longitude of event | Longitude | ||||
| 4 | Elevation of event | Elevation | m | |||
| 5 | Identification | ID | ||||
| 6 | Deposit type | Deposit type | ||||
| 7 | Manganese | Mn | % | Glasby, Geoffrey P | Atomic absorption spectrophotometry | |
| 8 | Iron | Fe | % | Glasby, Geoffrey P | Atomic absorption spectrophotometry | |
| 9 | Silicon dioxide | SiO2 | % | Glasby, Geoffrey P | Atomic absorption spectrophotometry | |
| 10 | Titanium | Ti | mg/kg | Glasby, Geoffrey P | Optical emission spectrography | |
| 11 | Vanadium | V | mg/kg | Glasby, Geoffrey P | Optical emission spectrography | |
| 12 | Chromium | Cr | mg/kg | Glasby, Geoffrey P | Optical emission spectrography | |
| 13 | Cobalt | Co | mg/kg | Glasby, Geoffrey P | Optical emission spectrography | |
| 14 | Nickel | Ni | mg/kg | Glasby, Geoffrey P | Optical emission spectrography | |
| 15 | Copper | Cu | mg/kg | Glasby, Geoffrey P | Optical emission spectrography | |
| 16 | Zinc | Zn | mg/kg | Glasby, Geoffrey P | Optical emission spectrography | |
| 17 | Zirconium | Zr | mg/kg | Glasby, Geoffrey P | Optical emission spectrography | |
| 18 | Molybdenum | Mo | mg/kg | Glasby, Geoffrey P | Optical emission spectrography | |
| 19 | Lead | Pb | mg/kg | Glasby, Geoffrey P | Optical emission spectrography | |
| 20 | Number of analyses | N analyses | # | Glasby, Geoffrey P | Number of sample analyses averaged for one station |
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
143 data points