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Thompson, Geoffrey; Humphris, Susan E; Schilling, Jean-Guy (1983): (Table 1) Basalt geochemsitry at DSDP Hole 72-516F. PANGAEA, https://doi.org/10.1594/PANGAEA.811425, Supplement to: Thompson, G et al. (1983): Petrology and geochemistry of basaltic rocks from Rio Grande Rise, South Atlantic: Deep Sea Drilling Project Leg 72, Hole 516F. In: Barker, PF; Carlson, RL; Johnson, DA; et al. (eds.), Initial Reports of the Deep Sea Drilling Project (U.S. Govt. Printing Office), 72, 457-466, https://doi.org/10.2973/dsdp.proc.72.115.1983

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Abstract:
Basalts from Hole 516F, DSDP Leg 72 on the Rio Grande Rise are tholeiitic in character but differ from normal mid-ocean ridge basalts in the South Atlantic in higher concentrations of incompatible elements such as Ti, K, V, Sr, Ba, Zr, Nb, and light rare-earth elements and in lower concentrations of Mg, Cr, and Ni. They contrast with previously reported basalts from the Rio Grande Rise, which were highly alkalic in character. The Rio Grande Rise basalts from Hole 516F (age 84.5 Ma) are generally similar to basalts from the eastern end of the Walvis Ridge (80-100 Ma). It is suggested that they either originated, like the Walvis Ridge, from a mantle hot spot that is different from the present-day hot spot (Tristan da Cunha) and that has changed composition with time, or from a spreading center that was shallow and chemically influenced by the adjacent hot spot, similar to the present-day Mid-Atlantic Ridge near the Azores and Tristan da Cunha.
Project(s):
Coverage:
Latitude: -30.276500 * Longitude: -35.285000
Date/Time Start: 1980-03-11T00:00:00 * Date/Time End: 1980-03-11T00:00:00
Minimum Elevation: -1313.0 m * Maximum Elevation: -1313.0 m
Event(s):
72-516F * Latitude: -30.276500 * Longitude: -35.285000 * Date/Time: 1980-03-11T00:00:00 * Elevation: -1313.0 m * Penetration: 1270.6 m * Recovery: 690.1 m * Location: South Atlantic/CONT RISE * Campaign: Leg72 * Basis: Glomar Challenger * Device: Drilling/drill rig (DRILL) * Comment: 127 cores; 1092.5 m cored; 9 m drilled; 63.2 % recovery
Comment:
Blanks indicate "not analyzed."
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethodComment
1Sample code/labelSample labelThompson, GeoffreyODP sample designation
2Silicon dioxideSiO2%Thompson, GeoffreyX-ray fluorescence (XRF)On a volatile-free basis after ignition at 1000°C
3Titanium dioxideTiO2%Thompson, GeoffreyX-ray fluorescence (XRF)On a volatile-free basis after ignition at 1000°C
4Aluminium oxideAl2O3%Thompson, GeoffreyX-ray fluorescence (XRF)On a volatile-free basis after ignition at 1000°C
5Iron oxide, FeOFeO%Thompson, GeoffreyX-ray fluorescence (XRF)Total iron; on a volatile-free basis after ignition at 1000°C
6Manganese oxideMnO%Thompson, GeoffreyX-ray fluorescence (XRF)On a volatile-free basis after ignition at 1000°C
7Magnesium oxideMgO%Thompson, GeoffreyX-ray fluorescence (XRF)On a volatile-free basis after ignition at 1000°C
8Calcium oxideCaO%Thompson, GeoffreyX-ray fluorescence (XRF)On a volatile-free basis after ignition at 1000°C
9Sodium oxideNa2O%Thompson, GeoffreyX-ray fluorescence (XRF)On a volatile-free basis after ignition at 1000°C
10Potassium oxideK2O%Thompson, GeoffreyX-ray fluorescence (XRF)On a volatile-free basis after ignition at 1000°C
11Phosphorus oxideP2O5%Thompson, GeoffreyX-ray fluorescence (XRF)On a volatile-free basis after ignition at 1000°C
12TotalTotal%Thompson, GeoffreyX-ray fluorescence (XRF)On a volatile-free basis after ignition at 1000°C
13Iron oxide, FeOFeO%Thompson, GeoffreyX-ray fluorescence (XRF)On a dried (110°C) basis
14Iron oxide, Fe2O3Fe2O3%Thompson, GeoffreyX-ray fluorescence (XRF)On a dried (110°C) basis
15Water in rockH2O%Thompson, GeoffreyX-ray fluorescence (XRF)+ ; On a dried (110°C) basis
16Water in rockH2O%Thompson, GeoffreyX-ray fluorescence (XRF)-
17Carbon dioxideCO2%Thompson, GeoffreyX-ray fluorescence (XRF)On a dried (110°C) basis
18RubidiumRbmg/kgThompson, GeoffreyX-ray fluorescence (XRF)On a dried (110°C) basis
19ScandiumScmg/kgThompson, GeoffreyX-ray fluorescence (XRF)On a dried (110°C) basis
20VanadiumVmg/kgThompson, GeoffreyX-ray fluorescence (XRF)On a dried (110°C) basis
21ChromiumCrmg/kgThompson, GeoffreyX-ray fluorescence (XRF)On a dried (110°C) basis
22CobaltComg/kgThompson, GeoffreyX-ray fluorescence (XRF)On a dried (110°C) basis
23NickelNimg/kgThompson, GeoffreyX-ray fluorescence (XRF)On a dried (110°C) basis
24CopperCumg/kgThompson, GeoffreyX-ray fluorescence (XRF)On a dried (110°C) basis
25ZincZnmg/kgThompson, GeoffreyX-ray fluorescence (XRF)On a dried (110°C) basis
26StrontiumSrmg/kgThompson, GeoffreyX-ray fluorescence (XRF)On a dried (110°C) basis
27BariumBamg/kgThompson, GeoffreyX-ray fluorescence (XRF)On a dried (110°C) basis
28YttriumYmg/kgThompson, GeoffreyX-ray fluorescence (XRF)On a dried (110°C) basis
29ZirconiumZrmg/kgThompson, GeoffreyX-ray fluorescence (XRF)On a dried (110°C) basis
30NiobiumNbmg/kgThompson, GeoffreyX-ray fluorescence (XRF)On a dried (110°C) basis
31LanthanumLamg/kgThompson, GeoffreyElement analysis, neutron activation (NAA)On a dried (110°C) basis
32CeriumCemg/kgThompson, GeoffreyElement analysis, neutron activation (NAA)On a dried (110°C) basis
33NeodymiumNdmg/kgThompson, GeoffreyElement analysis, neutron activation (NAA)On a dried (110°C) basis
34SamariumSmmg/kgThompson, GeoffreyElement analysis, neutron activation (NAA)On a dried (110°C) basis
35EuropiumEumg/kgThompson, GeoffreyElement analysis, neutron activation (NAA)On a dried (110°C) basis
36GadoliniumGdmg/kgThompson, GeoffreyElement analysis, neutron activation (NAA)On a dried (110°C) basis
37TerbiumTbmg/kgThompson, GeoffreyElement analysis, neutron activation (NAA)On a dried (110°C) basis
38DysprosiumDymg/kgThompson, GeoffreyElement analysis, neutron activation (NAA)On a dried (110°C) basis
39ThuliumTmmg/kgThompson, GeoffreyElement analysis, neutron activation (NAA)On a dried (110°C) basis
40YtterbiumYbmg/kgThompson, GeoffreyElement analysis, neutron activation (NAA)On a dried (110°C) basis
41LutetiumLumg/kgThompson, GeoffreyElement analysis, neutron activation (NAA)On a dried (110°C) basis
42CobaltComg/kgThompson, GeoffreyElement analysis, neutron activation (NAA)On a dried (110°C) basis
43ChromiumCrmg/kgThompson, GeoffreyElement analysis, neutron activation (NAA)On a dried (110°C) basis
44Sodium oxideNa2O%Thompson, GeoffreyElement analysis, neutron activation (NAA)
Size:
511 data points

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