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Hoffmann, Dirk L; Woda, Clemens; Strobl, Christopher; Mangini, Augusto (2001): (Table 1) Radionuclides and ESR dating of sediment cores PS1535-10 and PS1535-8. PANGAEA,, Supplement to: Hoffmann, DL et al. (2001): ESR-dating of the Arctic sediment core PS1535 dose-response and thermal behaviour of the CO-2-signal in foraminifera. Quaternary Science Reviews, 20(5-9), 1009-1014,

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ESR-spectra of foraminifera in arctic sediment cores display the [CO2]- -signal (g=2.0006). Research on the thermal behaviour of the [CO2]- -signal shows that both natural and artificial irradiation generates a precursor and a thermal unstable component of the [CO2]- -signal. The precursor can be transfered to the stable radical, and unstable radicals can be removed by heating. The signal-change by heating depends on the irradiation dose. Because of the varying response on thermal treatment, the dose-response curves show systematic differences depending on the applied procedure (single- or multi-aliquot method with or without heating). A model for the description of the [CO2]- -signal-change is presented. The combination of two exponential saturation functions seems to be an adequate analytical description of the dose-response curve of the [CO2]- -signal in foraminifera. Due to the limited thermal stability this signal can be used for dating foraminifera with ages up to about 190 ka.
Latitude: 78.738330 * Longitude: 1.940000
Date/Time Start: 1987-08-24T00:00:00 * Date/Time End: 1987-08-24T00:00:00
Minimum DEPTH, sediment/rock: 0.37 m * Maximum DEPTH, sediment/rock: 7.00 m
PS1535-10 (GIK21535-10 PS11/430-10) * Latitude: 78.738330 * Longitude: 1.940000 * Date/Time: 1987-08-24T00:00:00 * Elevation: -2555.0 m * Recovery: 8.13 m * Location: Fram Strait * Campaign: ARK-IV/3 (PS11) * Basis: Polarstern * Method/Device: Piston corer (BGR type) (KL) * Comment: 9 core sections: 0-0.87, 0.87-1.87, 1.87-2.87, 2.87-3.18, 3.18-4.18, 4.18-5.18, 5.18-6.18, 6.18-7.18, 7.18-8.13 m
Samples at 0.37-4.63 from core PS1535-8, samples at 5.48 and 7 m from core PS1535-10
#NameShort NameUnitPrincipal InvestigatorMethod/DeviceComment
1DEPTH, sediment/rockDepthmGeocode
2Age model, optionalAge model optkaHoffmann, Dirk LAge model, stable isotope stratigraphyd18O-age
3Method commentMethod commHoffmann, Dirk L
4Equivalent doseDeGyHoffmann, Dirk L
5Dose rate, standard deviationD std dev±Hoffmann, Dirk L
6Thorium-232232Thdpm/gHoffmann, Dirk L
7Thorium-232, standard deviation232Th std dev±Hoffmann, Dirk L
8Thorium-230230Thdpm/gHoffmann, Dirk L
9Thorium-230, standard deviation230Th std dev±Hoffmann, Dirk L
10Uranium-238238Udpm/gHoffmann, Dirk L
11Uranium-238, standard deviation238U std dev±Hoffmann, Dirk L
12Uranium-234/Uranium-238 activity ratio(234U/238U)Hoffmann, Dirk L
13Uranium-234/Uranium-238 activity ratio, standard deviation(234U/238U) std dev±Hoffmann, Dirk L
14PotassiumK%Hoffmann, Dirk L
15Potassium, standard deviationK std dev±Hoffmann, Dirk L
16Water content, wet massWater wm%Hoffmann, Dirk LCalculated from weight/volumewater content for samples 5.48 and 7 m was not measured (assumption)
17Water content, standard deviationWater std dev±Hoffmann, Dirk L
18Age, datedAge datedkaHoffmann, Dirk LAge, electron spin resonance (ESR)
19Age, dated standard deviationAge dated std dev±Hoffmann, Dirk L
162 data points

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