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| Sigman, Dm; Altabet, Ma; Francois, R; Mccorkle, Dc; Gaillard, Jf. |
| Treatment of diatom microfossils from Southern Ocean sediments with hot perchloric acid leaves a "diatom-bound" N fraction which is 0-4 parts per thousand lower in delta(15)N than the bulk sediment, typically 3 parts per thousand lower in recent Antarctic diatom ooze. Results from Southern Ocean surface sediments indicate that early diagenetic changes in bulk sediment N content and delta(15)N are not reflected in diatom-bound N, suggesting that diatom-bound N is physically protected from early diagenesis by the microfossil matrix. A meridional transect of multicores from the Indian sector of the Southern Ocean shows a northward increase in the delta(15)N Of diatom-bound N, suggesting that diatom-bound delta(15)N, like bulk sedimentary delta(15)N, varies... |
| Tipo: Text |
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| Ano: 1999 |
URL: https://archimer.ifremer.fr/doc/00239/35065/34591.pdf |
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