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Holm, Paul Martin (2002): (Table T1) Geochemical composition of gabbroic rocks from ODP Hole 176-735B. PANGAEA,, Supplement to: Holm, PM (2002): Data report: On the composition of the lower ocean crust-major and trace element analyses of gabbroic rocks from Hole 735B, 500-1500 mbsf. In: Natland, JH; Dick, HJB; Miller, DJ; Von Herzen, RP (eds.) Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 176, 1-13,

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Elemental data for 89 whole-rock samples from Hole 735B, 500-1500 meters below seafloor (Ocean Drilling Program Leg 176), are presented. The samples represent the rock types recovered. The data set is compared to shipboard analyses. The index Na/(Na + Al) is used to monitor magmatic evolution. Oxide-rich rocks are enriched in the albite component and are thus derived from relatively evolved melts. Not all evolved magmas precipitated Fe-Ti oxide. The geochemistry of most rocks is largely controlled by the proportion of cumulus clinopyroxene and plagioclase. The primitive magmas had Zr/Nb < 60, Sr = 0.100 ppm, and Sc = 0.35 ppm. All oxide-rich rocks are found to be mixtures of primitive and evolved mineral parageneses, and this supports the concept that Fe-Ti oxide-rich magmas percolated through olivine gabbros.
Latitude: -32.723210 * Longitude: 57.266010
Date/Time Start: 1997-10-24T13:45:00 * Date/Time End: 1997-12-01T19:00:00
Minimum DEPTH, sediment/rock: 517.62 m * Maximum DEPTH, sediment/rock: 1490.16 m
176-735B * Latitude: -32.723210 * Longitude: 57.266010 * Date/Time Start: 1997-10-24T13:45:00 * Date/Time End: 1997-12-01T19:00:00 * Elevation: -720.6 m * Penetration: 1508 m * Recovery: 865.99 m * Location: Indian Ocean * Campaign: Leg176 * Basis: Joides Resolution * Device: Drilling/drill rig (DRILL) * Comment: 122 cores; 1003.2 m cored; 504.8 m drilled; 86.3 % recovery
Sediment depth is given in mbsf. More geochemical data on Hole 176-735B can be found in Tables 1-2 of Holm et al. (2002, doi:10.1016/S0009-2541(01)00364-3) dataset: doi:10.1594/PANGAEA.705251.
#NameShort NameUnitPrincipal InvestigatorMethodComment
1Sample code/labelSample labelHolm, Paul MartinODP sample designation
2PiecePieceHolm, Paul Martin
3DEPTH, sediment/rockDepthmGeocode
4Lithologic unit/sequenceUnitHolm, Paul Martin
5Interval numberInterval NoHolm, Paul Martin
6Grain size descriptionGrain size descrHolm, Paul Martin
7MineralsMineralsHolm, Paul Martin
8Rock typeRockHolm, Paul Martin
9DescriptionDescriptionHolm, Paul Martin
10Silicon dioxideSiO2%Holm, Paul MartinX-ray fluorescence (XRF)
11Titanium dioxideTiO2%Holm, Paul MartinX-ray fluorescence (XRF)
12Aluminium oxideAl2O3%Holm, Paul MartinX-ray fluorescence (XRF)
13Iron oxide, Fe2O3Fe2O3%Holm, Paul Martin
14Iron oxide, FeOFeO%Holm, Paul Martin
15Manganese oxideMnO%Holm, Paul MartinX-ray fluorescence (XRF)
16Magnesium oxideMgO%Holm, Paul MartinX-ray fluorescence (XRF)
17Calcium oxideCaO%Holm, Paul MartinX-ray fluorescence (XRF)
18Sodium oxideNa2O%Holm, Paul MartinFlame photometry
19Potassium oxideK2O%Holm, Paul MartinX-ray fluorescence (XRF)
20Phosphorus oxideP2O5%Holm, Paul MartinX-ray fluorescence (XRF)
21VolatilesVolat%Holm, Paul Martin
22Elements, totaltotal%Holm, Paul Martin
23Iron oxide, Fe2O3Fe2O3%Holm, Paul MartinFe2O3 tot
24Calcium numberCa#Holm, Paul MartinCalculated= 100 x Ca/(Ca+Na)
25Magnesium numberMg#Holm, Paul MartinCalculated= 100 x Mg/(Mg+Fe tot)
26RatioRatioHolm, Paul MartinCalculatedNa#; = 100 x Na/(Na+Al)
27RubidiumRbmg/kgHolm, Paul MartinX-ray fluorescence (XRF)
28BariumBamg/kgHolm, Paul MartinX-ray fluorescence (XRF)
29LeadPbmg/kgHolm, Paul MartinX-ray fluorescence (XRF)
30StrontiumSrmg/kgHolm, Paul MartinX-ray fluorescence (XRF)
31LanthanumLamg/kgHolm, Paul MartinX-ray fluorescence (XRF)
32CeriumCemg/kgHolm, Paul MartinX-ray fluorescence (XRF)
33NeodymiumNdmg/kgHolm, Paul MartinX-ray fluorescence (XRF)
34YttriumYmg/kgHolm, Paul MartinX-ray fluorescence (XRF)
35ZirconiumZrmg/kgHolm, Paul MartinX-ray fluorescence (XRF)
36NiobiumNbmg/kgHolm, Paul MartinX-ray fluorescence (XRF)
37ZincZnmg/kgHolm, Paul MartinX-ray fluorescence (XRF)
38CopperCumg/kgHolm, Paul MartinX-ray fluorescence (XRF)
39CobaltComg/kgHolm, Paul MartinX-ray fluorescence (XRF)
40NickelNimg/kgHolm, Paul MartinX-ray fluorescence (XRF)
41ScandiumScmg/kgHolm, Paul MartinX-ray fluorescence (XRF)
42VanadiumVmg/kgHolm, Paul MartinX-ray fluorescence (XRF)
43ChromiumCrmg/kgHolm, Paul MartinX-ray fluorescence (XRF)
44GalliumGamg/kgHolm, Paul MartinX-ray fluorescence (XRF)
2423 data points

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