Cronan, David S; Tooms, J S (1968): (Table 1, page 220), Spot chemical analyses of a section of nodule 5133.7 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.849212, In supplement to: Cronan, DS; Tooms, JS (1968): A microscopic and electron probe investigation of manganese nodules from the northwest Indian Ocean. Deep Sea Research and Oceanographic Abstracts, 15(2), 215-223, https://doi.org/10.1016/0011-7471(68)90042-9
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Abstract:
Microscopic and electron probe examination of some manganese nodules show that they consist of segregations of manganese-iron oxides in an interstitial material almost free of manganese but rich in iron and silicates. The segregations are widely spaced in the volcanic cores of the nodules but become more abundant towards their outer crusts where they form the centres of linked polygons of interstitial materials. Most of the minor elements are concentrated in the segregations compared to the interstitial materials. It is suggested that the structures observed result partly from solution and reprecipitation of elements in the original volcanic cores of the nodules and partly from the replacement and coating of these cores by manganese-iron oxides precipitated from sea water.
Project(s):
Coverage:
Latitude: 2.756667 * Longitude: 60.046667
Date/Time Start: 1963-09-06T07:00:00 * Date/Time End: 1963-09-06T07:00:00
Minimum DEPTH, sediment/rock: 0 m * Maximum DEPTH, sediment/rock: 0 m
Event(s):
D5133 * Latitude: 2.756667 * Longitude: 60.046667 * Date/Time: 1963-09-06T07:00:00 * Elevation: -3980.0 m * Location: Indian Ocean * Campaign: D2 * Basis: Discovery (1962) * Method/Device: Dredge, rock (DRG_R)
Comment:
The analyses cover each an area of 2 km**2.
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1989 NOAA-NCEI compiled the NOAA-MMS Marine Minerals Geochemical Database from journal articles, technical reports and unpublished sources from other institutions.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 | Sample ID | Sample ID | Cronan, David S | |||
| 2 | DEPTH, sediment/rock | Depth sed | m | Cronan, David S | Geocode | |
| 3 | Manganese dioxide | MnO2 | % | Cronan, David S | Electron Probe Microanalysis (GEOSCAN) | |
| 4 | Iron oxide, Fe2O3 | Fe2O3 | % | Cronan, David S | Electron Probe Microanalysis (GEOSCAN) | |
| 5 | Titanium dioxide | TiO2 | % | Cronan, David S | Electron Probe Microanalysis (GEOSCAN) | |
| 6 | Cobalt oxide | CoO | % | Cronan, David S | Electron Probe Microanalysis (GEOSCAN) | |
| 7 | Nickel oxide | NiO | % | Cronan, David S | Electron Probe Microanalysis (GEOSCAN) | |
| 8 | Copper(II) oxide | CuO | % | Cronan, David S | Electron Probe Microanalysis (GEOSCAN) | |
| 9 | Calcium oxide | CaO | % | Cronan, David S | Electron Probe Microanalysis (GEOSCAN) | |
| 10 | Description | Description | Cronan, David S |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
18 data points
Data
| 1 Sample ID | 2 Depth sed [m] | 3 MnO2 [%] | 4 Fe2O3 [%] | 5 TiO2 [%] | 6 CoO [%] | 7 NiO [%] | 8 CuO [%] | 9 CaO [%] | 10 Description |
|---|---|---|---|---|---|---|---|---|---|
| 7-S | 0 | 32.61 | 53.40 | 0.91 | 0.53 | 0.44 | 0.15 | 3.30 | Local segregation of manganese-iron oxides (see Fig. 5) |
| 7-I | 0 | 0.83 | 27.92 | 0.26 | 0.04 | 0.04 | 0.03 | 3.14 | Interstitial material almost free of manganese but rich in iron and silicates (see Fig. 5) |