Radionuclide concentrations, ratios, and derived ages of massive sulfides from ODP Leg 139 and Leg 169 sites
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| Format: | Dataset Open Access |
| Sprache: | en |
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PANGAEA
2000
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| _version_ | 1867168561636573184 |
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| author | Scholten, Jan Christoph Lackschewitz, Klas Sven Marchig, Vesna Stoffers, Peter Mangini, Augusto |
| author_facet | Scholten, Jan Christoph Lackschewitz, Klas Sven Marchig, Vesna Stoffers, Peter Mangini, Augusto |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | Massive sulfide samples from the Bent Hill area were analyzed for 230Th/234U and 231Pa/235U disequilibria. Apparent ages calculated from these ratios are between 8.2 and >300 ka. Concordant ages were found for only three samples that originate near the surface from the clastic sulfide zone and suggest "true" ages of between 8.5 and 16.0 ka (mean of 230Th and 231Pa ages). The uranium vs. depth distribution in the Bent Hill Massive Sulfide deposit suggests an open system for uranium for the deeper part of the deposit, which was probably caused by extensive recrystallization processes inhibiting true age determinations. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_788692 |
| institution | PANGAEA |
| language | en |
| publishDate | 2000 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Radionuclide concentrations, ratios, and derived ages of massive sulfides from ODP Leg 139 and Leg 169 sites Scholten, Jan Christoph Lackschewitz, Klas Sven Marchig, Vesna Stoffers, Peter Mangini, Augusto Ocean Drilling Program; ODP Massive sulfide samples from the Bent Hill area were analyzed for 230Th/234U and 231Pa/235U disequilibria. Apparent ages calculated from these ratios are between 8.2 and >300 ka. Concordant ages were found for only three samples that originate near the surface from the clastic sulfide zone and suggest "true" ages of between 8.5 and 16.0 ka (mean of 230Th and 231Pa ages). The uranium vs. depth distribution in the Bent Hill Massive Sulfide deposit suggests an open system for uranium for the deeper part of the deposit, which was probably caused by extensive recrystallization processes inhibiting true age determinations. |
| title | Radionuclide concentrations, ratios, and derived ages of massive sulfides from ODP Leg 139 and Leg 169 sites |
| topic | Ocean Drilling Program; ODP |
| url | https://doi.org/10.1594/PANGAEA.788692 |