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| Main Authors: | , , , |
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| Format: | Dataset Open Access |
| Language: | en |
| Published: |
PANGAEA
2001
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| Online Access: | https://doi.org/10.1594/PANGAEA.120604 |
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| _version_ | 1867168630175694848 |
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| author | Hoffmann, Dirk L Woda, Clemens Strobl, Christopher Mangini, Augusto |
| author_facet | Hoffmann, Dirk L Woda, Clemens Strobl, Christopher Mangini, Augusto |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | 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. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_120604 |
| institution | PANGAEA |
| language | en |
| publishDate | 2001 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | (Table 1) Radionuclides and ESR dating of sediment cores PS1535-10 and PS1535-8 Hoffmann, Dirk L Woda, Clemens Strobl, Christopher Mangini, Augusto Age, dated; Age, dated, standard deviation; Age, electron spin resonance (ESR); Age model, optional; Age model, stable isotope stratigraphy; ARK-IV/3; Calculated from mass/volume; DEPTH, sediment/rock; Dose rate, standard deviation; Equivalent dose; Fram Strait; GIK21535-10 PS11/430-10; KL; Method comment; Piston corer (BGR type); Polarstern; Potassium; Potassium, standard deviation; PS11; PS1535-10; Thorium-230; Thorium-230, standard deviation; Thorium-232; Thorium-232, standard deviation; Uranium-234/Uranium-238 activity ratio; Uranium-234/Uranium-238 activity ratio, standard deviation; Uranium-238; Uranium-238, standard deviation; Water content, standard deviation; Water content, wet mass 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. |
| title | (Table 1) Radionuclides and ESR dating of sediment cores PS1535-10 and PS1535-8 |
| topic | Age, dated; Age, dated, standard deviation; Age, electron spin resonance (ESR); Age model, optional; Age model, stable isotope stratigraphy; ARK-IV/3; Calculated from mass/volume; DEPTH, sediment/rock; Dose rate, standard deviation; Equivalent dose; Fram Strait; GIK21535-10 PS11/430-10; KL; Method comment; Piston corer (BGR type); Polarstern; Potassium; Potassium, standard deviation; PS11; PS1535-10; Thorium-230; Thorium-230, standard deviation; Thorium-232; Thorium-232, standard deviation; Uranium-234/Uranium-238 activity ratio; Uranium-234/Uranium-238 activity ratio, standard deviation; Uranium-238; Uranium-238, standard deviation; Water content, standard deviation; Water content, wet mass |
| url | https://doi.org/10.1594/PANGAEA.120604 |