Analysis of 10Be and Th isotopes in manganese nodules
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| Autores principales: | , , , , , , |
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| Formato: | Dataset Open Access |
| Lenguaje: | en |
| Publicado: |
PANGAEA
1982
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| _version_ | 1867169514351755264 |
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| author | Krishnaswami, Seth Mangini, Augusto Thomas, J H Sharma, P Cochran, J Kirk Turekian, Karl K Parker, P D |
| author_facet | Krishnaswami, Seth Mangini, Augusto Thomas, J H Sharma, P Cochran, J Kirk Turekian, Karl K Parker, P D |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | The usefulness of cosmogenic beryllium-10 (half life = 2.5 Ma) for studying the rates of accumulation of ferromanganese nodules is reported based on its measured depth distribution in the top 20 mm of these deposits. Accumulation rates have been obtained in the range of 1 to 4 mm/Ma, which are in good agreement with rates determined using the 230Th method on the same nodules. The use of 10Be offers promise in extending the dating to the outer few cm of the nodules. This contrasts with conventional methods using 230Th and 231Pa isotopes which, due to their comparatively short half lives, are limited to a few mm at the surface of the nodules. Detailed studies of 10Be in the manganese deposits coupled with other trace element analyses should prove valuable in understanding the processes of formation of these deposits and the chronology of events recorded by them. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_871720 |
| institution | PANGAEA |
| language | en |
| publishDate | 1982 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Analysis of 10Be and Th isotopes in manganese nodules Krishnaswami, Seth Mangini, Augusto Thomas, J H Sharma, P Cochran, J Kirk Turekian, Karl K Parker, P D ARRH-TF; BC; Box corer; DOMES-A47-16; Dredge; DRG; Indian Ocean; NOAA and MMS Marine Minerals Geochemical Database; NOAA-MMS; Oceanographer; Pacific Ocean; RP8OC75; RP8OC75-47-16; Vit 5186; Vityaz (ex-Mars); Vityaz-35; VITYAZ5186 The usefulness of cosmogenic beryllium-10 (half life = 2.5 Ma) for studying the rates of accumulation of ferromanganese nodules is reported based on its measured depth distribution in the top 20 mm of these deposits. Accumulation rates have been obtained in the range of 1 to 4 mm/Ma, which are in good agreement with rates determined using the 230Th method on the same nodules. The use of 10Be offers promise in extending the dating to the outer few cm of the nodules. This contrasts with conventional methods using 230Th and 231Pa isotopes which, due to their comparatively short half lives, are limited to a few mm at the surface of the nodules. Detailed studies of 10Be in the manganese deposits coupled with other trace element analyses should prove valuable in understanding the processes of formation of these deposits and the chronology of events recorded by them. |
| title | Analysis of 10Be and Th isotopes in manganese nodules |
| topic | ARRH-TF; BC; Box corer; DOMES-A47-16; Dredge; DRG; Indian Ocean; NOAA and MMS Marine Minerals Geochemical Database; NOAA-MMS; Oceanographer; Pacific Ocean; RP8OC75; RP8OC75-47-16; Vit 5186; Vityaz (ex-Mars); Vityaz-35; VITYAZ5186 |
| url | https://doi.org/10.1594/PANGAEA.871720 |