Cumming, G L (1976): Lead isotope ratios of basalts from DSDP Leg 37 (Table 1) [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.708696, Supplement to: Cumming, GL (1976): Lead isotope ratios in DSDP Leg 37 basalts. Earth and Planetary Science Letters, 31(1), 179-183, https://doi.org/10.1016/0012-821X(76)90110-2
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Abstract:
Analyses of Pb from mid-ocean ridge basalts obtained from DSDP Leg 37 lie on a line of near-zero-age slope. The data seem consistent with an evolutionary model of three stages, the beginning of the second stage being at about 600 m.y. - the model age obtained for the least radiogenic Pb. The beginning of the third stage of evolution at the time of formation of the rocks apparently did not change the average Th/U ratio since measured values are consistent with the ratio deduced from Pb isotope ratios. Ratios of U/Pb are not consistent with Pb isotope ratios, however, thus ruling out a simple two-stage evolutionary model.
Project(s):
Deep Sea Drilling Project (DSDP)
Coverage:
Median Latitude: 37.017700 * Median Longitude: -34.160233 * South-bound Latitude: 36.878700 * West-bound Longitude: -35.198700 * North-bound Latitude: 37.295700 * East-bound Longitude: -33.641000
Date/Time Start: 1974-06-17T00:00:00 * Date/Time End: 1974-07-18T00:00:00
Minimum Elevation: -3188.0 m * Maximum Elevation: -1806.0 m
Event(s):
37-332A * Latitude: 36.878700 * Longitude: -33.641000 * Date/Time: 1974-06-17T00:00:00 * Elevation: -1818.0 m * Penetration: 434.5 m * Recovery: 66.2 m * Location: North Atlantic/VALLEY * Campaign: Leg37 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 39 cores; 370.5 m cored; 0 m drilled; 17.9 % recovery
37-332B * Latitude: 36.878700 * Longitude: -33.641000 * Date/Time: 1974-06-17T00:00:00 * Elevation: -1806.0 m * Penetration: 721.5 m * Recovery: 122.9 m * Location: North Atlantic/VALLEY * Campaign: Leg37 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 48 cores; 582.5 m cored; 0 m drilled; 19.4 % recovery
37-335 * Latitude: 37.295700 * Longitude: -35.198700 * Date/Time: 1974-07-18T00:00:00 * Elevation: -3188.0 m * Penetration: 562 m * Recovery: 59 m * Location: North Atlantic * Campaign: Leg37 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 16 cores; 152 m cored; 0 m drilled; 38.8 % recovery
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Event label | Event | ||||
| 2 | Sample code/label | Sample label | Cumming, G L | DSDP/ODP/IODP sample designation | ||
| 3 | Lead | Pb | mg/kg | Cumming, G L | ||
| 4 | Uranium | U | mg/kg | Cumming, G L | ||
| 5 | Uranium, standard deviation | U std dev | ± | Cumming, G L | ||
| 6 | Thorium | Th | mg/kg | Cumming, G L | ||
| 7 | Thorium, standard deviation | Th std dev | ± | Cumming, G L | ||
| 8 | Lead-206/Lead-204 ratio | 206Pb/204Pb | Cumming, G L | Isotope ratio mass spectrometry | ||
| 9 | Lead-206/Lead-204 ratio, error | 206Pb/204Pb e | ± | Cumming, G L | Isotope ratio mass spectrometry | |
| 10 | Lead-207/Lead-204 ratio | 207Pb/204Pb | Cumming, G L | Isotope ratio mass spectrometry | ||
| 11 | Lead-207/Lead-204 ratio, error | 207Pb/204Pb e | ± | Cumming, G L | Isotope ratio mass spectrometry | |
| 12 | Lead-208/Lead-204 ratio | 208Pb/204Pb | Cumming, G L | Isotope ratio mass spectrometry | ||
| 13 | Lead-208/Lead-204 ratio, error | 208Pb/204Pb e | ± | Cumming, G L | Isotope ratio mass spectrometry |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
110 data points