Barrett, T J; Friedrichsen, Hans (1982): (Table 3) Pb- and Sr-isotopic compositions of selected samples of nontronite, Mn-oxide crust, Mn-Fe-oxide mud, and pelagic sediments from the Galapagos mounds area, Leg 70 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.695904, In supplement to: Barrett, TJ; Friedrichsen, H (1982): Elemental and isotopic compositions of some metalliferous and pelagic sediments from the Galapagos mounds area, DSDP Leg 70. Chemical Geology, 36(3-4), 275-298, https://doi.org/10.1016/0009-2541(82)90052-3
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Project(s):
Deep Sea Drilling Project (DSDP)
Coverage:
Median Latitude: 0.591650 * Median Longitude: -86.099100 * South-bound Latitude: 0.566700 * West-bound Longitude: -86.132200 * North-bound Latitude: 0.610200 * East-bound Longitude: -86.090000
Date/Time Start: 1979-11-15T00:00:00 * Date/Time End: 1979-11-27T00:00:00
Minimum DEPTH, sediment/rock: 0.22 m * Maximum DEPTH, sediment/rock: 28.77 m
Event(s):
70-506 * Latitude: 0.609800 * Longitude: -86.099800 * Date/Time: 1979-11-15T00:00:00 * Elevation: -2710.0 m * Penetration: 36.7 m * Recovery: 22.7 m * Location: North Pacific/MOUND * Campaign: Leg70 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 7 cores; 27.9 m cored; 8.8 m drilled; 81.5 % recovery
70-506B * Latitude: 0.610200 * Longitude: -86.091300 * Date/Time: 1979-11-15T00:00:00 * Elevation: -2711.0 m * Penetration: 20.7 m * Recovery: 20.2 m * Location: North Pacific/MOUND * Campaign: Leg70 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 6 cores; 20.7 m cored; 0 m drilled; 97.6 % recovery
70-506C * Latitude: 0.607700 * Longitude: -86.091300 * Date/Time: 1979-11-15T00:00:00 * Elevation: -2710.0 m * Penetration: 31.3 m * Recovery: 29.7 m * Location: North Pacific/MOUND * Campaign: Leg70 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 8 cores; 31.3 m cored; 0 m drilled; 95 % recovery
Comment:
Pb was extracted from whole-rock powder splits by dissolution followed by electrodeposition technique of Arden & Gale (1974), doi:10.1021/ac60337a037. Cathodic electrodeposition was carried out twice prior to anodic electrodeposition in order to ensure removal of all Fe prior to analysis. Samples were mounted on a single Fe filament using silica gel-phosphoric acid activator and the analyses were made on the Oxford 12-in. solid source mass spectrometer designed by Dr. N.H.Gale. Pb-isotope data have been corrected for mass fractionation by comparison with results on standard NBS 981. Typical errors on Pb-isotopic ratios are 0.1-0.15% (2 sigma). Sr was extracted from powder splits by standard ion-exchange methods (O'Nions, Pankhurst, 1973; doi:10.1016/0009-2541(73)90110-1), and analysed on a V.G. MM-30 mass spectrometer at Oxford. 87Sr/86Sr ratios have been normalised to a value of 0.70800 for the Eimer and Amend Sr standard. Typical errors on 87Sr/86Sr measurements are 0.01%.
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Event label | Event | ||||
| 2 | Latitude of event | Latitude | ||||
| 3 | Longitude of event | Longitude | ||||
| 4 | Elevation of event | Elevation | m | |||
| 5 | DEPTH, sediment/rock | Depth sed | m | Geocode | ||
| 6 | Sample code/label | Sample label | Barrett, T J | DSDP/ODP/IODP sample designation | ||
| 7 | Lithology/composition/facies | Lithology | Barrett, T J | |||
| 8 | Lead-206/Lead-204 ratio | 206Pb/204Pb | Barrett, T J | |||
| 9 | Lead-207/Lead-204 ratio | 207Pb/204Pb | Barrett, T J | |||
| 10 | Lead-208/Lead-204 ratio | 208Pb/204Pb | Barrett, T J | |||
| 11 | Strontium-87/Strontium-86 ratio | 87Sr/86Sr | Barrett, T J | |||
| 12 | Strontium-87/Strontium-86 ratio, error | 87Sr/86Sr e | ± | Barrett, T J |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
120 data points