Smalley, P Craig; Qvale, G; Qvale, H (1989): Strontium and rubidium concentrations of ODP Site 104-642 (Table 1) [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.736458, Supplement to: Smalley, PC et al. (1989): Some ages from Leg 104 Site 642 obtained by Rb-Sr glauconite dating and Sr isotope stratigraphy. In: Eldholm, O; Thiede, J; Taylor, E; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 104, 249-253, https://doi.org/10.2973/odp.proc.sr.104.178.1989
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Abstract:
We have attempted to date several samples from Site 642 using a combination of Sr isotope stratigraphy and Rb-Sr dating of glauconite. A carbonate shell fragment from Sample 104-642B-22H-6, 70-73 cm gives a Sr isotope stratigraphy date of 17.3 +/- 1.0 Ma, which agrees well with available biostratigraphic and paleomagnetic data. Glauconites from a nearby sample (104-642B-23H-1, 66-69 cm) give a similar date.
One carbonate shell fragment and two fish teeth samples from Core 104-642D-12X give concordant Sr isotope stratigraphy ages of about 37 Ma (latest Eocene). Rb-Sr glauconite analyses from one of the samples, while showing some substrate contamination, also support an Eocene age. Our results are in conflict with Miocene palynomorph dates from Core 104-642D-12X. As specific reworking of fish teeth and carbonate macrofossils (and also glauconite) from 37 Ma old sediments into three different samples in Core 104-642D-12X is most unlikely, we view the 37-Ma date as the depositional age of the core.
Project(s):
Ocean Drilling Program (ODP)
Coverage:
Median Latitude: 67.222500 * Median Longitude: 2.929150 * South-bound Latitude: 67.220000 * West-bound Longitude: 2.928300 * North-bound Latitude: 67.225000 * East-bound Longitude: 2.930000
Date/Time Start: 1985-06-28T14:40:00 * Date/Time End: 1985-07-04T00:10:00
Minimum Elevation: -1294.0 m * Maximum Elevation: -1292.0 m
Event(s):
104-642B * Latitude: 67.225000 * Longitude: 2.928300 * Date/Time Start: 1985-06-28T14:40:00 * Date/Time End: 1985-06-29T20:15:00 * Elevation: -1294.0 m * Penetration: 221.1 m * Recovery: 214.61 m * Location: Norwegian Sea * Campaign: Leg104 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 25 cores; 221.1 m cored; 0 m drilled; 97.1 % recovery
104-642D * Latitude: 67.220000 * Longitude: 2.930000 * Date/Time Start: 1985-07-01T15:00:00 * Date/Time End: 1985-07-04T00:10:00 * Elevation: -1292.0 m * Penetration: 329.9 m * Recovery: 114.58 m * Location: Norwegian Sea * Campaign: Leg104 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 19 cores; 140 m cored; 0 m drilled; 81.8 % recovery
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Event label | Event | ||||
| 2 | Sample code/label | Sample label | Smalley, P Craig | DSDP/ODP/IODP sample designation | ||
| 3 | Material | Material | Smalley, P Craig | |||
| 4 | Rubidium | Rb | mg/kg | Smalley, P Craig | Isotope dilution | |
| 5 | Strontium | Sr | mg/kg | Smalley, P Craig | Isotope dilution | |
| 6 | Rubidium/Strontium ratio | Rb/Sr | Smalley, P Craig | |||
| 7 | Rubidium-87/Strontium-86 ratio | 87Rb/86Sr | Smalley, P Craig | precises to +/- 1 % (2 sigma) | ||
| 8 | Strontium-87/Strontium-86 ratio | 87Sr/86Sr | Smalley, P Craig | |||
| 9 | Strontium-87/Strontium-86 ratio, error | 87Sr/86Sr e | ± | Smalley, P Craig | ||
| 10 | Age, dated | Age dated | ka | Smalley, P Craig | Dates with quoted uncertainties obtained by marine Sr stratigraphy. Others are Rb-Sr glauconite model dates using I(Sr) equivalent to 87Sr/86Sr of related carbonate/phosphate sample. | |
| 11 | Age, dated standard deviation | Age dated std dev | ± | Smalley, P Craig |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
69 data points
Data
| 1 Event | 2 Sample label | 3 Material | 4 Rb [mg/kg] | 5 Sr [mg/kg] | 6 Rb/Sr | 7 87Rb/86Sr | 8 87Sr/86Sr | 9 87Sr/86Sr e [±] | 10 Age dated [ka] | 11 Age dated std dev [±] |
|---|---|---|---|---|---|---|---|---|---|---|
| 104-642B | 104-642B-23H-1,66-69 | medium green spheres glauvonite | 174.2 | 5.32 | 32.7 | 94.9 | 0.734320 | 0.000090 | 19000 | |
| 104-642B | 104-642B-23H-1,66-69 | medium green glauconite | 163.8 | 6.75 | 24.3 | 70.3 | 0.725310 | 0.000030 | 16700 | |
| 104-642B | 104-642B-23H-1,66-69 | dark green glauconite | 239.2 | 3.55 | 67.4 | 195.7 | 0.753180 | 0.000030 | 16000 | |
| 104-642B | 104-642B-22H-6,70-73 | fragments of carbonate macrofossil shells | 0.708662 | 0.000025 | 17300 | 1000 | ||||
| 104-642D | 104-642D-12X-2,78-81 | light green glauconite | 147.1 | 5.42 | 27.2 | 78.9 | 0.752260 | 0.000090 | 39600 | |
| 104-642D | 104-642D-12X-2,78-81 | very light green glauconite | 116.2 | 5.19 | 22.4 | 65.1 | 0.749760 | 0.000030 | 45400 | |
| 104-642D | 104-642D-12X-2,78-81 | fish teeth | 0.707828 | 0.000006 | 37000 | 1200 | ||||
| 104-642D | 104-642D-12X-4,81-84 | fragments of carbonate macrofossil shells | 0.707811 | 0.000012 | 38500 | 1700 | ||||
| 104-642D | 104-642D-12X-5,145-149 | fish teeth | 0.707825 | 0.000006 | 37000 | 1200 |