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Iyer, S D; Mukhopadhyay, R; Popko, D C (2007): Major and trace element composition in the Central Indian Ocean Basin ferrobasalts (Table 2, 3). PANGAEA,, Supplement to: Iyer, SD et al. (1999): Ferrobasalts from the Central Indian Ocean Basin. Geo-Marine Letters, 18(4), 297-304,

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We report the occurrence of ferrobasalts recovered from the Central Indian Ocean Basin crust generated at the Southeast Indian Ridge during a phase of moderate to fast spreading accretion (~110-190 mm/yr, full rate).The rocks are rich in plagioclase, FeO* (13/19 %), and TiO2 (2.27/2.76 %), poor in olivine and MgO (3.44/6.20%), and associated with topographic highs and increased amplitude magnetic anomalies corresponding to chrons A25 and A24. We suggest that secon dary eruptions from ancient N-MORB magma, which may have been trapped at a shallow depth in a horizon of neutral buoyancy, could have produced the ferrobasalts.
Median Latitude: -12.069990 * Median Longitude: 77.296670 * South-bound Latitude: -13.333300 * West-bound Longitude: 76.500000 * North-bound Latitude: -11.000000 * East-bound Longitude: 78.000000
Minimum DEPTH, sediment/rock: m * Maximum DEPTH, sediment/rock: m
CIOB * Latitude Start: -11.000000 * Longitude Start: 76.000000 * Latitude End: -13.000000 * Longitude End: 78.000000 * Elevation Start: -4900.0 m * Elevation End: -5500.0 m * Location: Indian Ocean * Device: Dredge (DRG)
Whole rock chemistry of the ferrobasalts was determined through XRF and ICP-AES
#NameShort NameUnitPrincipal InvestigatorMethodComment
3DEPTH, sediment/rockDepthmGeocode
4Depth, bathymetricBathy depthmIyer, S D
5Sample code/labelSample labelIyer, S D
6Sample commentSample commentIyer, S D
7Lithology/composition/faciesLithologyIyer, S D
8Silicon dioxideSiO2%Iyer, S D
9Titanium dioxideTiO2%Iyer, S D
10Aluminium oxideAl2O3%Iyer, S D
11Iron oxide, FeOFeO%Iyer, S Dtotal iron
12Magnesium oxideMgO%Iyer, S D
13Calcium oxideCaO%Iyer, S D
14Sodium oxideNa2O%Iyer, S D
15Potassium oxideK2O%Iyer, S D
16Manganese oxideMnO%Iyer, S D
17Phosphorus oxideP2O5%Iyer, S D
18BariumBamg/kgIyer, S D
19CobaltComg/kgIyer, S D
20ChromiumCrmg/kgIyer, S D
21CopperCumg/kgIyer, S D
22NickelNimg/kgIyer, S D
23YttriumYmg/kgIyer, S D
24VanadiumVmg/kgIyer, S D
25ZincZnmg/kgIyer, S D
26ZirconiumZrmg/kgIyer, S D
174 data points

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