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| Autori principali: | , , |
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| Natura: | Dataset Open Access |
| Lingua: | en |
| Pubblicazione: |
PANGAEA
1991
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| Accesso online: | https://doi.org/10.1594/PANGAEA.854348 |
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| _version_ | 1867171368720662528 |
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| author | Banerjee, R Iyer, S D Dutta, P |
| author_facet | Banerjee, R Iyer, S D Dutta, P |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | Buried nodules from siliceous sediments in the central Indian Basin are morphologically variable and mineralogically consist of d-MnO2 and incipient todorokite. Compositionally they are weakly diagenetic. The sediment coarse fractions (>63 µm) at different depths show variable abundances of micronodules, volcanic glass shards and biodebris. Dissolution of biodebris increases and abundance of micronodules decreases with increasing depth. Enrichment in Mn, Fe, Cu, Ni, Co, together with a decrease in organic carbon in the sediment column, may result from diagenetic metal remobilization. Diagenetically remobilized trace metals might have been utilized for the growth of micronodules over the buried nodules. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_854348 |
| institution | PANGAEA |
| language | en |
| publishDate | 1991 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Description, geochemistry and growth rate of buried nodules from the Central Indian Basin Banerjee, R Iyer, S D Dutta, P BC; Box corer; Indian Ocean; NOAA and MMS Marine Minerals Geochemical Database; NOAA-MMS; SKAN22-B1 Buried nodules from siliceous sediments in the central Indian Basin are morphologically variable and mineralogically consist of d-MnO2 and incipient todorokite. Compositionally they are weakly diagenetic. The sediment coarse fractions (>63 µm) at different depths show variable abundances of micronodules, volcanic glass shards and biodebris. Dissolution of biodebris increases and abundance of micronodules decreases with increasing depth. Enrichment in Mn, Fe, Cu, Ni, Co, together with a decrease in organic carbon in the sediment column, may result from diagenetic metal remobilization. Diagenetically remobilized trace metals might have been utilized for the growth of micronodules over the buried nodules. |
| title | Description, geochemistry and growth rate of buried nodules from the Central Indian Basin |
| topic | BC; Box corer; Indian Ocean; NOAA and MMS Marine Minerals Geochemical Database; NOAA-MMS; SKAN22-B1 |
| url | https://doi.org/10.1594/PANGAEA.854348 |