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Cronan, David S; Tooms, J S (1968): (Table 1, page 220), Spot chemical analyses of a section of nodule 5133.7. PANGAEA,, 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,

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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.
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: m * Maximum DEPTH, sediment/rock: m
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) * Device: Dredge, rock (DRG_R)
The analyses cover each an area of 2 km**2.
#NameShort NameUnitPrincipal InvestigatorMethodComment
1Sample IDSample IDCronan, David S
2DEPTH, sediment/rockDepthmCronan, David SGeocode
3Manganese dioxideMnO2%Cronan, David SElectron Probe Microanalysis (GEOSCAN)
4Iron oxide, Fe2O3Fe2O3%Cronan, David SElectron Probe Microanalysis (GEOSCAN)
5Titanium dioxideTiO2%Cronan, David SElectron Probe Microanalysis (GEOSCAN)
6Cobalt oxideCoO%Cronan, David SElectron Probe Microanalysis (GEOSCAN)
7Nickel oxideNiO%Cronan, David SElectron Probe Microanalysis (GEOSCAN)
8Copper(II) oxideCuO%Cronan, David SElectron Probe Microanalysis (GEOSCAN)
9Calcium oxideCaO%Cronan, David SElectron Probe Microanalysis (GEOSCAN)
10DescriptionDescriptionCronan, David S
18 data points

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