Chemical composition and rate of accumulation of manganese nodules in the western North Pacific
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| Auteurs principaux: | , , |
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| Format: | Dataset Open Access |
| Langue: | en |
| Publié: |
PANGAEA
1975
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| _version_ | 1867169513561128960 |
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| author | Sugimura, Y Miyake, Yasuo Yanagawa, Hatsue |
| author_facet | Sugimura, Y Miyake, Yasuo Yanagawa, Hatsue |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | The major and some of the minor constituents and the rate of accumulation of manganese nodules in the western North Pacific were determined. Manganese concentration in the nodules ranged from 20 to 30 per cent in the acid soluble fraction. As to the rare earth concentration, enrichment of cerium was observed in the manganese nodule as compared with that in shales or sea water. Thorium to uranium ratio in the nodule ranged from 9.4 to 14.3, which was very much higher than that in sea water. From the distribution of excess ionium, excess protactinium and Io/Th ratio, a rate of accumulation of 7 mm per million years was obtained with the surface layer of several mm in thickness of the JEDS-4-E4 nodule. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_863982 |
| institution | PANGAEA |
| language | en |
| publishDate | 1975 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Chemical composition and rate of accumulation of manganese nodules in the western North Pacific Sugimura, Y Miyake, Yasuo Yanagawa, Hatsue NOAA and MMS Marine Minerals Geochemical Database; NOAA-MMS The major and some of the minor constituents and the rate of accumulation of manganese nodules in the western North Pacific were determined. Manganese concentration in the nodules ranged from 20 to 30 per cent in the acid soluble fraction. As to the rare earth concentration, enrichment of cerium was observed in the manganese nodule as compared with that in shales or sea water. Thorium to uranium ratio in the nodule ranged from 9.4 to 14.3, which was very much higher than that in sea water. From the distribution of excess ionium, excess protactinium and Io/Th ratio, a rate of accumulation of 7 mm per million years was obtained with the surface layer of several mm in thickness of the JEDS-4-E4 nodule. |
| title | Chemical composition and rate of accumulation of manganese nodules in the western North Pacific |
| topic | NOAA and MMS Marine Minerals Geochemical Database; NOAA-MMS |
| url | https://doi.org/10.1594/PANGAEA.863982 |