Particulate aluminium, iron and manganese chemistry at the deep Atlantic boundary layer
| Autor: | James K. B. Bishop, C.E. Lambert, R. Chesselet, Pierre E. Biscaye |
|---|---|
| Přispěvatelé: | Centre des Faibles Radioactivités, Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS), Lamont-Doherty Earth Observatory (LDEO), Columbia University [New York] |
| Jazyk: | angličtina |
| Rok vydání: | 1984 |
| Předmět: |
010504 meteorology & atmospheric sciences
chemistry.chemical_element Mineralogy Flux Manganese 010502 geochemistry & geophysics 01 natural sciences Water column Geochemistry and Petrology Aluminium Earth and Planetary Sciences (miscellaneous) 14. Life underwater [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment Scavenging ComputingMilieux_MISCELLANEOUS 0105 earth and related environmental sciences [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere geography geography.geographical_feature_category Chemistry Abyssal plain Particulates Geophysics 13. Climate action Space and Planetary Science Ridge (meteorology) |
| Zdroj: | Earth and Planetary Science Letters Earth and Planetary Science Letters, Elsevier, 1984, 70 (2), pp.237-248. ⟨10.1016/0012-821X(84)90008-6⟩ Earth and Planetary Science Letters, 1984, 70 (2), pp.237-248. ⟨10.1016/0012-821X(84)90008-6⟩ |
| ISSN: | 0012-821X |
| DOI: | 10.1016/0012-821X(84)90008-6⟩ |
| Popis: | Scanning electron microscopy and instrumental neutron activation analyses of filtered suspended matter from the Atlantic Ocean show that particulate aluminium (Al p ) is a sensitive measure of bottom derived or resuspended material. The proportion of Al p in suspended particulate matter (SPM) increases slightly between surface and intermediate depths but shows large and steady increases in deep waters with approach to the bottom. Fe p /Al p andMn p /Al p ratios are always higher than the crustal ratios throughout the water column. We show that the processes which can explain such enrichments are different for particulate matter in surface waters (scavenging, incorporation in biogenic particles) than for resuspended material (precipitation from interstitial waters on surficial sediments). Close to the Mid-Atlantic Ridge, the bottom suspended matter exhibits higher Fe p /Al p andMn p /Al p ratios than in abyssal plains. A ridge crest source must be invoked to explain the striking enrichment of Mn p . This source could also explain the enrichment of Fe p , although primarily because the resuspended flux is small in that region, one cannot exclude the contribution of particles from the mid-water column. |
| Databáze: | OpenAIRE |
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